springboot使用jmh基准测试评估json反序列化实体转换的性能差异

Posted 2022-10-06

1、背景

笔者经常把一些经常使用的数据放到redis缓存，方便程序进行读取。

比如按照不同的键名将数值存储到hash值类型中。示例如下

hash             hashkey   hashValue

snapshot          999          "\\"id\\":999,\\"distId\\":999,\\"distName\\":\\"玄武区\\",\\"confirm\\":7,\\"suspect\\":0,\\"dead\\":0,\\"heal\\":2,\\"weight\\":6.6,\\"level\\":\\"area\\",\\"mapId\\":\\"c320100_2\\",\\"updateTime\\":\\"2020-03-03 07:20:39\\""

snapshot1         999           "confirm":7,"dead":0,"heal":2,"weight":6.6,"mapId":"c320100_2","updateTime":"2020-03-03 07:20:39","name":"玄武区"

 

以上数据分别2052条

 

 

 

 

 

 

分别将snapshot1，snapshot转换成实体，现在将对他们进行基准测试，以评测两种存储方式的性能差异

2、基准测试

2个独立进程，分别依1次热身/热加载，批量执行20次，总计40次

2.1、snapshot1相关测试

这里用的实体转换框架是​​ModelMapper​​​，官网：​​http://modelmapper.org/​​ 其性能比较高，主要用于实体属性之间的拷贝，

是笔者工作中项目实践中通过对比，选择到的这个框架。

maven依赖

<dependency>
   <groupId>org.modelmapper</groupId>
   <artifactId>modelmapper</artifactId>
   <version>0.7.7</version>
</dependency>

 以下modelMapper转换成实体代码要加 

modelMapper.getConfiguration().setMatchingStrategy(MatchingStrategies.STRICT);

 

不同的方法会影响基准测试的最终结果

@Benchmark
public void testMapToPojo()

    ModelMapper modelMapper = new ModelMapper();
    Map<String, Map> map = cacheService.getCacheMap("snapshot1");
    Map<String,SnapShot> result = new HashMap<>();

    for(Iterator<Map.Entry<String, Map>> it = map.entrySet().iterator(); it.hasNext();)
    
        Map.Entry<String, Map> entry = it.next();

        String key = entry.getKey();
        SnapShot snapshot = modelMapper.map(entry, SnapShot.class);
        result.put(key, snapshot);
    

/**
     * 获得缓存的Map
     *
     * @param key
     * @return
     */
    @Override
    public <T> Map<String, T> getCacheMap(String key) 
        Map<String, T> map = redisTemplate.opsForHash().entries(key);
        return map;
    

 

测试日志：

D:\\develop\\java\\jdk1.8.0_181\\bin\\java.exe "-javaagent:D:\\Program Files\\JetBrains\\IntelliJ IDEA 2018.3.4\\lib\\idea_rt.jar=52204:D:\\Program Files\\JetBrains\\IntelliJ IDEA 2018.3.4\\bin" -Dfile.encoding=UTF-8 -classpath D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\charsets.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\deploy.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\access-bridge-64.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\cldrdata.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\dnsns.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\jaccess.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\jfxrt.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\localedata.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\nashorn.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\sunec.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\sunjce_provider.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\sunmscapi.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\sunpkcs11.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\zipfs.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\javaws.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\jce.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\jfr.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\jfxswt.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\jsse.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\management-agent.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\plugin.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\resources.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\rt.jar;E:\\project\\java\\springBootJmh\\target\\test-classes;E:\\project\\java\\springBootJmh\\target\\classes;D:\\develop\\apache-maven-3.5.4\\repo\\org\\apache\\commons\\commons-pool2\\2.5.0\\commons-pool2-2.5.0.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\boot\\spring-boot-starter-cache\\2.2.4.RELEASE\\spring-boot-starter-cache-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\boot\\spring-boot-starter\\2.2.4.RELEASE\\spring-boot-starter-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\boot\\spring-boot\\2.2.4.RELEASE\\spring-boot-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\boot\\spring-boot-autoconfigure\\2.2.4.RELEASE\\spring-boot-autoconfigure-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\boot\\spring-boot-starter-logging\\2.2.4.RELEASE\\spring-boot-starter-logging-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\ch\\qos\\logback\\logback-classic\\1.2.3\\logback-classic-1.2.3.jar;D:\\develop\\apache-maven-3.5.4\\repo\\ch\\qos\\logback\\logback-core\\1.2.3\\logback-core-1.2.3.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\apache\\logging\\log4j\\log4j-to-slf4j\\2.12.1\\log4j-to-slf4j-2.12.1.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\apache\\logging\\log4j\\log4j-api\\2.12.1\\log4j-api-2.12.1.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\slf4j\\jul-to-slf4j\\1.7.30\\jul-to-slf4j-1.7.30.jar;D:\\develop\\apache-maven-3.5.4\\repo\\jakarta\\annotation\\jakarta.annotation-api\\1.3.5\\jakarta.annotation-api-1.3.5.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\yaml\\snakeyaml\\1.25\\snakeyaml-1.25.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\spring-context-support\\5.2.3.RELEASE\\spring-context-support-5.2.3.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\spring-beans\\5.2.3.RELEASE\\spring-beans-5.2.3.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\spring-context\\5.2.3.RELEASE\\spring-context-5.2.3.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\spring-expression\\5.2.3.RELEASE\\spring-expression-5.2.3.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\boot\\spring-boot-starter-data-redis\\2.2.4.RELEASE\\spring-boot-starter-data-redis-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\data\\spring-data-redis\\2.2.4.RELEASE\\spring-data-redis-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\data\\spring-data-keyvalue\\2.2.4.RELEASE\\spring-data-keyvalue-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\data\\spring-data-commons\\2.2.4.RELEASE\\spring-data-commons-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\spring-tx\\5.2.3.RELEASE\\spring-tx-5.2.3.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\spring-oxm\\5.2.3.RELEASE\\spring-oxm-5.2.3.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\spring-aop\\5.2.3.RELEASE\\spring-aop-5.2.3.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\slf4j\\slf4j-api\\1.7.30\\slf4j-api-1.7.30.jar;D:\\develop\\apache-maven-3.5.4\\repo\\io\\lettuce\\lettuce-core\\5.2.1.RELEASE\\lettuce-core-5.2.1.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\io\\netty\\netty-common\\4.1.45.Final\\netty-common-4.1.45.Final.jar;D:\\develop\\apache-maven-3.5.4\\repo\\io\\netty\\netty-handler\\4.1.45.Final\\netty-handler-4.1.45.Final.jar;D:\\develop\\apache-maven-3.5.4\\repo\\io\\netty\\netty-buffer\\4.1.45.Final\\netty-buffer-4.1.45.Final.jar;D:\\develop\\apache-maven-3.5.4\\repo\\io\\netty\\netty-codec\\4.1.45.Final\\netty-codec-4.1.45.Final.jar;D:\\develop\\apache-maven-3.5.4\\repo\\io\\netty\\netty-transport\\4.1.45.Final\\netty-transport-4.1.45.Final.jar;D:\\develop\\apache-maven-3.5.4\\repo\\io\\netty\\netty-resolver\\4.1.45.Final\\netty-resolver-4.1.45.Final.jar;D:\\develop\\apache-maven-3.5.4\\repo\\io\\projectreactor\\reactor-core\\3.3.2.RELEASE\\reactor-core-3.3.2.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\reactivestreams\\reactive-streams\\1.0.3\\reactive-streams-1.0.3.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\dyuproject\\protostuff\\protostuff-runtime\\1.1.3\\protostuff-runtime-1.1.3.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\dyuproject\\protostuff\\protostuff-collectionschema\\1.1.3\\protostuff-collectionschema-1.1.3.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\dyuproject\\protostuff\\protostuff-api\\1.0.8\\protostuff-api-1.0.8.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\dyuproject\\protostuff\\protostuff-core\\1.0.8\\protostuff-core-1.0.8.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\projectlombok\\lombok\\1.18.10\\lombok-1.18.10.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\boot\\spring-boot-starter-test\\2.2.4.RELEASE\\spring-boot-starter-test-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\boot\\spring-boot-test\\2.2.4.RELEASE\\spring-boot-test-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\boot\\spring-boot-test-autoconfigure\\2.2.4.RELEASE\\spring-boot-test-autoconfigure-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\jayway\\jsonpath\\json-path\\2.4.0\\json-path-2.4.0.jar;D:\\develop\\apache-maven-3.5.4\\repo\\net\\minidev\\json-smart\\2.3\\json-smart-2.3.jar;D:\\develop\\apache-maven-3.5.4\\repo\\net\\minidev\\accessors-smart\\1.2\\accessors-smart-1.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\ow2\\asm\\asm\\5.0.4\\asm-5.0.4.jar;D:\\develop\\apache-maven-3.5.4\\repo\\jakarta\\xml\\bind\\jakarta.xml.bind-api\\2.3.2\\jakarta.xml.bind-api-2.3.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\jakarta\\activation\\jakarta.activation-api\\1.2.1\\jakarta.activation-api-1.2.1.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\junit\\jupiter\\junit-jupiter\\5.5.2\\junit-jupiter-5.5.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\junit\\jupiter\\junit-jupiter-api\\5.5.2\\junit-jupiter-api-5.5.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\apiguardian\\apiguardian-api\\1.1.0\\apiguardian-api-1.1.0.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\opentest4j\\opentest4j\\1.2.0\\opentest4j-1.2.0.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\junit\\platform\\junit-platform-commons\\1.5.2\\junit-platform-commons-1.5.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\junit\\jupiter\\junit-jupiter-params\\5.5.2\\junit-jupiter-params-5.5.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\junit\\jupiter\\junit-jupiter-engine\\5.5.2\\junit-jupiter-engine-5.5.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\junit\\platform\\junit-platform-engine\\1.5.2\\junit-platform-engine-1.5.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\mockito\\mockito-junit-jupiter\\3.1.0\\mockito-junit-jupiter-3.1.0.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\assertj\\assertj-core\\3.13.2\\assertj-core-3.13.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\hamcrest\\hamcrest\\2.1\\hamcrest-2.1.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\mockito\\mockito-core\\3.1.0\\mockito-core-3.1.0.jar;D:\\develop\\apache-maven-3.5.4\\repo\\net\\bytebuddy\\byte-buddy\\1.10.6\\byte-buddy-1.10.6.jar;D:\\develop\\apache-maven-3.5.4\\repo\\net\\bytebuddy\\byte-buddy-agent\\1.10.6\\byte-buddy-agent-1.10.6.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\objenesis\\objenesis\\2.6\\objenesis-2.6.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\skyscreamer\\jsonassert\\1.5.0\\jsonassert-1.5.0.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\vaadin\\external\\google\\android-json\\0.0.20131108.vaadin1\\android-json-0.0.20131108.vaadin1.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\spring-core\\5.2.3.RELEASE\\spring-core-5.2.3.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\spring-jcl\\5.2.3.RELEASE\\spring-jcl-5.2.3.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\spring-test\\5.2.3.RELEASE\\spring-test-5.2.3.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\xmlunit\\xmlunit-core\\2.6.3\\xmlunit-core-2.6.3.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\google\\guava\\guava\\20.0\\guava-20.0.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\google\\code\\gson\\gson\\2.8.4\\gson-2.8.4.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\modelmapper\\modelmapper\\0.7.7\\modelmapper-0.7.7.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\openjdk\\jmh\\jmh-core\\1.21\\jmh-core-1.21.jar;D:\\develop\\apache-maven-3.5.4\\repo\\net\\sf\\jopt-simple\\jopt-simple\\4.6\\jopt-simple-4.6.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\apache\\commons\\commons-math3\\3.2\\commons-math3-3.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\openjdk\\jmh\\jmh-generator-annprocess\\1.21\\jmh-generator-annprocess-1.21.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\fasterxml\\jackson\\core\\jackson-annotations\\2.10.2\\jackson-annotations-2.10.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\fasterxml\\jackson\\core\\jackson-databind\\2.10.2\\jackson-databind-2.10.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\fasterxml\\jackson\\core\\jackson-core\\2.10.2\\jackson-core-2.10.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\fasterxml\\jackson\\datatype\\jackson-datatype-jsr310\\2.10.2\\jackson-datatype-jsr310-2.10.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\commons-beanutils\\commons-beanutils\\1.9.3\\commons-beanutils-1.9.3.jar;D:\\develop\\apache-maven-3.5.4\\repo\\commons-logging\\commons-logging\\1.2\\commons-logging-1.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\commons-collections\\commons-collections\\3.2.2\\commons-collections-3.2.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\junit\\junit\\4.12\\junit-4.12.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\hamcrest\\hamcrest-core\\2.1\\hamcrest-core-2.1.jar com.springboot.AppTest
# JMH version: 1.21
# VM version: JDK 1.8.0_181, Java HotSpot(TM) 64-Bit Server VM, 25.181-b13
# VM invoker: D:\\develop\\java\\jdk1.8.0_181\\jre\\bin\\java.exe
# VM options: -javaagent:D:\\Program Files\\JetBrains\\IntelliJ IDEA 2018.3.4\\lib\\idea_rt.jar=52204:D:\\Program Files\\JetBrains\\IntelliJ IDEA 2018.3.4\\bin -Dfile.encoding=UTF-8
# Warmup: 1 iterations, 10 s each
# Measurement: 20 iterations, 10 s each
# Timeout: 10 min per iteration
# Threads: 1 thread, will synchronize iterations
# Benchmark mode: Average time, time/op
# Benchmark: com.springboot.AppTest.testMapToPojo

# Run progress: 0.00% complete, ETA 00:07:00
# Fork: 1 of 2
# Warmup Iteration   1: LOGBACK: No context given for c.q.l.core.rolling.SizeAndTimeBasedRollingPolicy@999543437

  .   ____          _            __ _ _
 /\\\\ / ____ __ _ _(_)_ __  __ _ \\ \\ \\ \\
( ( )\\___ | _ | _| | _ \\/ _` | \\ \\ \\ \\
 \\\\/  ___)| |_)| | | | | || (_| |  ) ) ) )
    |____| .__|_| |_|_| |_\\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.2.4.RELEASE)

2020-03-04 10:39:47.875  INFO 10892 --- [jo-jmh-worker-1] o.s.boot.SpringApplication               : Starting application on DESKTOP-AJTC6JT with PID 10892 (started by Administrator in E:\\project\\java\\springBootJmh)
2020-03-04 10:39:47.880  INFO 10892 --- [jo-jmh-worker-1] o.s.boot.SpringApplication               : No active profile set, falling back to default profiles: default
2020-03-04 10:39:48.380  INFO 10892 --- [jo-jmh-worker-1] .s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode!
2020-03-04 10:39:48.384  INFO 10892 --- [jo-jmh-worker-1] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data Redis repositories in DEFAULT mode.
2020-03-04 10:39:48.417  INFO 10892 --- [jo-jmh-worker-1] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 19ms. Found 0 Redis repository interfaces.
2020-03-04 10:39:49.420  INFO 10892 --- [jo-jmh-worker-1] o.s.boot.SpringApplication               : Started application in 2.007 seconds (JVM running for 2.878)
2020-03-04 10:39:49.704  INFO 10892 --- [jo-jmh-worker-1] io.lettuce.core.EpollProvider            : Starting without optional epoll library
2020-03-04 10:39:49.705  INFO 10892 --- [jo-jmh-worker-1] io.lettuce.core.KqueueProvider           : Starting without optional kqueue library
4.977 ms/op
Iteration   1: 4.245 ms/op
Iteration   2: 4.212 ms/op
Iteration   3: 4.223 ms/op
Iteration   4: 4.372 ms/op
Iteration   5: 4.472 ms/op
Iteration   6: 4.559 ms/op
Iteration   7: 4.569 ms/op
Iteration   8: 4.393 ms/op
Iteration   9: 4.357 ms/op
Iteration  10: 4.218 ms/op
Iteration  11: 4.273 ms/op
Iteration  12: 4.372 ms/op
Iteration  13: 4.274 ms/op
Iteration  14: 4.194 ms/op
Iteration  15: 4.198 ms/op
Iteration  16: 4.177 ms/op
Iteration  17: 4.175 ms/op
Iteration  18: 4.180 ms/op
Iteration  19: 4.181 ms/op
Iteration  20: 4.185 ms/op

# Run progress: 50.00% complete, ETA 00:03:33
# Fork: 2 of 2
# Warmup Iteration   1: LOGBACK: No context given for c.q.l.core.rolling.SizeAndTimeBasedRollingPolicy@142500488

  .   ____          _            __ _ _
 /\\\\ / ____ __ _ _(_)_ __  __ _ \\ \\ \\ \\
( ( )\\___ | _ | _| | _ \\/ _` | \\ \\ \\ \\
 \\\\/  ___)| |_)| | | | | || (_| |  ) ) ) )
    |____| .__|_| |_|_| |_\\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.2.4.RELEASE)

2020-03-04 10:43:21.156  INFO 5872 --- [jo-jmh-worker-1] o.s.boot.SpringApplication               : Starting application on DESKTOP-AJTC6JT with PID 5872 (started by Administrator in E:\\project\\java\\springBootJmh)
2020-03-04 10:43:21.159  INFO 5872 --- [jo-jmh-worker-1] o.s.boot.SpringApplication               : No active profile set, falling back to default profiles: default
2020-03-04 10:43:21.571  INFO 5872 --- [jo-jmh-worker-1] .s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode!
2020-03-04 10:43:21.574  INFO 5872 --- [jo-jmh-worker-1] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data Redis repositories in DEFAULT mode.
2020-03-04 10:43:21.600  INFO 5872 --- [jo-jmh-worker-1] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 14ms. Found 0 Redis repository interfaces.
2020-03-04 10:43:22.461  INFO 5872 --- [jo-jmh-worker-1] o.s.boot.SpringApplication               : Started application in 1.646 seconds (JVM running for 2.298)
2020-03-04 10:43:22.720  INFO 5872 --- [jo-jmh-worker-1] io.lettuce.core.EpollProvider            : Starting without optional epoll library
2020-03-04 10:43:22.722  INFO 5872 --- [jo-jmh-worker-1] io.lettuce.core.KqueueProvider           : Starting without optional kqueue library
4.919 ms/op
Iteration   1: 4.240 ms/op
Iteration   2: 4.222 ms/op
Iteration   3: 4.188 ms/op
Iteration   4: 4.183 ms/op
Iteration   5: 4.188 ms/op
Iteration   6: 4.179 ms/op
Iteration   7: 4.210 ms/op
Iteration   8: 4.185 ms/op
Iteration   9: 4.409 ms/op
Iteration  10: 4.203 ms/op
Iteration  11: 4.219 ms/op
Iteration  12: 4.225 ms/op
Iteration  13: 4.333 ms/op
Iteration  14: 4.302 ms/op
Iteration  15: 4.240 ms/op
Iteration  16: 4.222 ms/op
Iteration  17: 4.297 ms/op
Iteration  18: 4.253 ms/op
Iteration  19: 4.243 ms/op
Iteration  20: 4.308 ms/op


Result "com.springboot.AppTest.testMapToPojo":
  4.267 ±(99.9%) 0.057 ms/op [Average]
  (min, avg, max) = (4.175, 4.267, 4.569), stdev = 0.101
  CI (99.9%): [4.210, 4.324] (assumes normal distribution)


# Run complete. Total time: 00:07:06

REMEMBER: The numbers below are just data. To gain reusable insights, you need to follow up on
why the numbers are the way they are. Use profilers (see -prof, -lprof), design factorial
experiments, perform baseline and negative tests that provide experimental control, make sure
the benchmarking environment is safe on JVM/OS/HW level, ask for reviews from the domain experts.
Do not assume the numbers tell you what you want them to tell.

Benchmark              Mode  Cnt  Score   Error  Units
AppTest.testMapToPojo  avgt   40  4.267 ± 0.057  ms/op

Process finished with exit code 0

结果：40次基准测试，最小（最理想）4.175毫秒，均值 4.267毫秒，最大值（最坏情况）4.569毫秒

 

2.2、snapshot测试

@Benchmark
public void testGetPojo()

    Map<String, SnapShot> map = cacheService.getCacheMap("snapshot", SnapShot.class);

@Override
public <T> Map<String, T> getCacheMap(String key, Class<T> clazz) 
    Map<String, String> raw = redisTemplate.opsForHash().entries(key);
    Map<String, T> map = Maps.newLinkedHashMapWithExpectedSize(raw.size());

    for (Map.Entry<String, String> entry : raw.entrySet()) 
        String hashKey = entry.getKey();
        String value = entry.getValue();
        map.put(hashKey, gson.fromJson(value, clazz));
    
    return map;

测试日志：

D:\\develop\\java\\jdk1.8.0_181\\bin\\java.exe "-javaagent:D:\\Program Files\\JetBrains\\IntelliJ IDEA 2018.3.4\\lib\\idea_rt.jar=52899:D:\\Program Files\\JetBrains\\IntelliJ IDEA 2018.3.4\\bin" -Dfile.encoding=UTF-8 -classpath D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\charsets.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\deploy.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\access-bridge-64.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\cldrdata.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\dnsns.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\jaccess.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\jfxrt.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\localedata.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\nashorn.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\sunec.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\sunjce_provider.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\sunmscapi.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\sunpkcs11.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\ext\\zipfs.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\javaws.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\jce.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\jfr.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\jfxswt.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\jsse.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\management-agent.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\plugin.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\resources.jar;D:\\develop\\java\\jdk1.8.0_181\\jre\\lib\\rt.jar;E:\\project\\java\\springBootJmh\\target\\test-classes;E:\\project\\java\\springBootJmh\\target\\classes;D:\\develop\\apache-maven-3.5.4\\repo\\org\\apache\\commons\\commons-pool2\\2.5.0\\commons-pool2-2.5.0.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\boot\\spring-boot-starter-cache\\2.2.4.RELEASE\\spring-boot-starter-cache-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\boot\\spring-boot-starter\\2.2.4.RELEASE\\spring-boot-starter-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\boot\\spring-boot\\2.2.4.RELEASE\\spring-boot-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\boot\\spring-boot-autoconfigure\\2.2.4.RELEASE\\spring-boot-autoconfigure-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\boot\\spring-boot-starter-logging\\2.2.4.RELEASE\\spring-boot-starter-logging-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\ch\\qos\\logback\\logback-classic\\1.2.3\\logback-classic-1.2.3.jar;D:\\develop\\apache-maven-3.5.4\\repo\\ch\\qos\\logback\\logback-core\\1.2.3\\logback-core-1.2.3.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\apache\\logging\\log4j\\log4j-to-slf4j\\2.12.1\\log4j-to-slf4j-2.12.1.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\apache\\logging\\log4j\\log4j-api\\2.12.1\\log4j-api-2.12.1.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\slf4j\\jul-to-slf4j\\1.7.30\\jul-to-slf4j-1.7.30.jar;D:\\develop\\apache-maven-3.5.4\\repo\\jakarta\\annotation\\jakarta.annotation-api\\1.3.5\\jakarta.annotation-api-1.3.5.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\yaml\\snakeyaml\\1.25\\snakeyaml-1.25.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\spring-context-support\\5.2.3.RELEASE\\spring-context-support-5.2.3.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\spring-beans\\5.2.3.RELEASE\\spring-beans-5.2.3.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\spring-context\\5.2.3.RELEASE\\spring-context-5.2.3.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\spring-expression\\5.2.3.RELEASE\\spring-expression-5.2.3.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\boot\\spring-boot-starter-data-redis\\2.2.4.RELEASE\\spring-boot-starter-data-redis-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\data\\spring-data-redis\\2.2.4.RELEASE\\spring-data-redis-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\data\\spring-data-keyvalue\\2.2.4.RELEASE\\spring-data-keyvalue-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\data\\spring-data-commons\\2.2.4.RELEASE\\spring-data-commons-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\spring-tx\\5.2.3.RELEASE\\spring-tx-5.2.3.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\spring-oxm\\5.2.3.RELEASE\\spring-oxm-5.2.3.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\spring-aop\\5.2.3.RELEASE\\spring-aop-5.2.3.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\slf4j\\slf4j-api\\1.7.30\\slf4j-api-1.7.30.jar;D:\\develop\\apache-maven-3.5.4\\repo\\io\\lettuce\\lettuce-core\\5.2.1.RELEASE\\lettuce-core-5.2.1.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\io\\netty\\netty-common\\4.1.45.Final\\netty-common-4.1.45.Final.jar;D:\\develop\\apache-maven-3.5.4\\repo\\io\\netty\\netty-handler\\4.1.45.Final\\netty-handler-4.1.45.Final.jar;D:\\develop\\apache-maven-3.5.4\\repo\\io\\netty\\netty-buffer\\4.1.45.Final\\netty-buffer-4.1.45.Final.jar;D:\\develop\\apache-maven-3.5.4\\repo\\io\\netty\\netty-codec\\4.1.45.Final\\netty-codec-4.1.45.Final.jar;D:\\develop\\apache-maven-3.5.4\\repo\\io\\netty\\netty-transport\\4.1.45.Final\\netty-transport-4.1.45.Final.jar;D:\\develop\\apache-maven-3.5.4\\repo\\io\\netty\\netty-resolver\\4.1.45.Final\\netty-resolver-4.1.45.Final.jar;D:\\develop\\apache-maven-3.5.4\\repo\\io\\projectreactor\\reactor-core\\3.3.2.RELEASE\\reactor-core-3.3.2.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\reactivestreams\\reactive-streams\\1.0.3\\reactive-streams-1.0.3.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\dyuproject\\protostuff\\protostuff-runtime\\1.1.3\\protostuff-runtime-1.1.3.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\dyuproject\\protostuff\\protostuff-collectionschema\\1.1.3\\protostuff-collectionschema-1.1.3.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\dyuproject\\protostuff\\protostuff-api\\1.0.8\\protostuff-api-1.0.8.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\dyuproject\\protostuff\\protostuff-core\\1.0.8\\protostuff-core-1.0.8.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\projectlombok\\lombok\\1.18.10\\lombok-1.18.10.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\boot\\spring-boot-starter-test\\2.2.4.RELEASE\\spring-boot-starter-test-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\boot\\spring-boot-test\\2.2.4.RELEASE\\spring-boot-test-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\boot\\spring-boot-test-autoconfigure\\2.2.4.RELEASE\\spring-boot-test-autoconfigure-2.2.4.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\jayway\\jsonpath\\json-path\\2.4.0\\json-path-2.4.0.jar;D:\\develop\\apache-maven-3.5.4\\repo\\net\\minidev\\json-smart\\2.3\\json-smart-2.3.jar;D:\\develop\\apache-maven-3.5.4\\repo\\net\\minidev\\accessors-smart\\1.2\\accessors-smart-1.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\ow2\\asm\\asm\\5.0.4\\asm-5.0.4.jar;D:\\develop\\apache-maven-3.5.4\\repo\\jakarta\\xml\\bind\\jakarta.xml.bind-api\\2.3.2\\jakarta.xml.bind-api-2.3.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\jakarta\\activation\\jakarta.activation-api\\1.2.1\\jakarta.activation-api-1.2.1.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\junit\\jupiter\\junit-jupiter\\5.5.2\\junit-jupiter-5.5.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\junit\\jupiter\\junit-jupiter-api\\5.5.2\\junit-jupiter-api-5.5.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\apiguardian\\apiguardian-api\\1.1.0\\apiguardian-api-1.1.0.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\opentest4j\\opentest4j\\1.2.0\\opentest4j-1.2.0.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\junit\\platform\\junit-platform-commons\\1.5.2\\junit-platform-commons-1.5.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\junit\\jupiter\\junit-jupiter-params\\5.5.2\\junit-jupiter-params-5.5.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\junit\\jupiter\\junit-jupiter-engine\\5.5.2\\junit-jupiter-engine-5.5.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\junit\\platform\\junit-platform-engine\\1.5.2\\junit-platform-engine-1.5.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\mockito\\mockito-junit-jupiter\\3.1.0\\mockito-junit-jupiter-3.1.0.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\assertj\\assertj-core\\3.13.2\\assertj-core-3.13.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\hamcrest\\hamcrest\\2.1\\hamcrest-2.1.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\mockito\\mockito-core\\3.1.0\\mockito-core-3.1.0.jar;D:\\develop\\apache-maven-3.5.4\\repo\\net\\bytebuddy\\byte-buddy\\1.10.6\\byte-buddy-1.10.6.jar;D:\\develop\\apache-maven-3.5.4\\repo\\net\\bytebuddy\\byte-buddy-agent\\1.10.6\\byte-buddy-agent-1.10.6.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\objenesis\\objenesis\\2.6\\objenesis-2.6.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\skyscreamer\\jsonassert\\1.5.0\\jsonassert-1.5.0.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\vaadin\\external\\google\\android-json\\0.0.20131108.vaadin1\\android-json-0.0.20131108.vaadin1.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\spring-core\\5.2.3.RELEASE\\spring-core-5.2.3.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\spring-jcl\\5.2.3.RELEASE\\spring-jcl-5.2.3.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\springframework\\spring-test\\5.2.3.RELEASE\\spring-test-5.2.3.RELEASE.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\xmlunit\\xmlunit-core\\2.6.3\\xmlunit-core-2.6.3.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\google\\guava\\guava\\20.0\\guava-20.0.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\google\\code\\gson\\gson\\2.8.4\\gson-2.8.4.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\modelmapper\\modelmapper\\0.7.7\\modelmapper-0.7.7.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\openjdk\\jmh\\jmh-core\\1.21\\jmh-core-1.21.jar;D:\\develop\\apache-maven-3.5.4\\repo\\net\\sf\\jopt-simple\\jopt-simple\\4.6\\jopt-simple-4.6.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\apache\\commons\\commons-math3\\3.2\\commons-math3-3.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\openjdk\\jmh\\jmh-generator-annprocess\\1.21\\jmh-generator-annprocess-1.21.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\fasterxml\\jackson\\core\\jackson-annotations\\2.10.2\\jackson-annotations-2.10.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\fasterxml\\jackson\\core\\jackson-databind\\2.10.2\\jackson-databind-2.10.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\fasterxml\\jackson\\core\\jackson-core\\2.10.2\\jackson-core-2.10.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\com\\fasterxml\\jackson\\datatype\\jackson-datatype-jsr310\\2.10.2\\jackson-datatype-jsr310-2.10.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\commons-beanutils\\commons-beanutils\\1.9.3\\commons-beanutils-1.9.3.jar;D:\\develop\\apache-maven-3.5.4\\repo\\commons-logging\\commons-logging\\1.2\\commons-logging-1.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\commons-collections\\commons-collections\\3.2.2\\commons-collections-3.2.2.jar;D:\\develop\\apache-maven-3.5.4\\repo\\junit\\junit\\4.12\\junit-4.12.jar;D:\\develop\\apache-maven-3.5.4\\repo\\org\\hamcrest\\hamcrest-core\\2.1\\hamcrest-core-2.1.jar com.springboot.AppTest
# JMH version: 1.21
# VM version: JDK 1.8.0_181, Java HotSpot(TM) 64-Bit Server VM, 25.181-b13
# VM invoker: D:\\develop\\java\\jdk1.8.0_181\\jre\\bin\\java.exe
# VM options: -javaagent:D:\\Program Files\\JetBrains\\IntelliJ IDEA 2018.3.4\\lib\\idea_rt.jar=52899:D:\\Program Files\\JetBrains\\IntelliJ IDEA 2018.3.4\\bin -Dfile.encoding=UTF-8
# Warmup: 1 iterations, 10 s each
# Measurement: 20 iterations, 10 s each
# Timeout: 10 min per iteration
# Threads: 1 thread, will synchronize iterations
# Benchmark mode: Average time, time/op
# Benchmark: com.springboot.AppTest.testGetPojo

# Run progress: 0.00% complete, ETA 00:07:00
# Fork: 1 of 2
# Warmup Iteration   1: LOGBACK: No context given for c.q.l.core.rolling.SizeAndTimeBasedRollingPolicy@1051164110

  .   ____          _            __ _ _
 /\\\\ / ____ __ _ _(_)_ __  __ _ \\ \\ \\ \\
( ( )\\___ | _ | _| | _ \\/ _` | \\ \\ \\ \\
 \\\\/  ___)| |_)| | | | | || (_| |  ) ) ) )
    |____| .__|_| |_|_| |_\\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.2.4.RELEASE)

2020-03-04 11:08:57.181  INFO 12868 --- [jo-jmh-worker-1] o.s.boot.SpringApplication               : Starting application on DESKTOP-AJTC6JT with PID 12868 (started by Administrator in E:\\project\\java\\springBootJmh)
2020-03-04 11:08:57.185  INFO 12868 --- [jo-jmh-worker-1] o.s.boot.SpringApplication               : No active profile set, falling back to default profiles: default
2020-03-04 11:08:57.710  INFO 12868 --- [jo-jmh-worker-1] .s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode!
2020-03-04 11:08:57.712  INFO 12868 --- [jo-jmh-worker-1] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data Redis repositories in DEFAULT mode.
2020-03-04 11:08:57.746  INFO 12868 --- [jo-jmh-worker-1] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 21ms. Found 0 Redis repository interfaces.
2020-03-04 11:08:58.849  INFO 12868 --- [jo-jmh-worker-1] o.s.boot.SpringApplication               : Started application in 2.147 seconds (JVM running for 3.097)
2020-03-04 11:08:59.086  INFO 12868 --- [jo-jmh-worker-1] io.lettuce.core.EpollProvider            : Starting without optional epoll library
2020-03-04 11:08:59.087  INFO 12868 --- [jo-jmh-worker-1] io.lettuce.core.KqueueProvider           : Starting without optional kqueue library
8.041 ms/op
Iteration   1: 7.019 ms/op
Iteration   2: 7.032 ms/op
Iteration   3: 7.008 ms/op
Iteration   4: 7.081 ms/op
Iteration   5: 6.997 ms/op
Iteration   6: 6.958 ms/op
Iteration   7: 6.925 ms/op
Iteration   8: 6.935 ms/op
Iteration   9: 6.943 ms/op
Iteration  10: 6.940 ms/op
Iteration  11: 6.948 ms/op
Iteration  12: 6.956 ms/op
Iteration  13: 7.033 ms/op
Iteration  14: 6.969 ms/op
Iteration  15: 6.964 ms/op
Iteration  16: 6.962 ms/op
Iteration  17: 6.962 ms/op
Iteration  18: 6.955 ms/op
Iteration  19: 6.959 ms/op
Iteration  20: 6.973 ms/op

# Run progress: 50.00% complete, ETA 00:03:33
# Fork: 2 of 2
# Warmup Iteration   1: LOGBACK: No context given for c.q.l.core.rolling.SizeAndTimeBasedRollingPolicy@1741951395

  .   ____          _            __ _ _
 /\\\\ / ____ __ _ _(_)_ __  __ _ \\ \\ \\ \\
( ( )\\___ | _ | _| | _ \\/ _` | \\ \\ \\ \\
 \\\\/  ___)| |_)| | | | | || (_| |  ) ) ) )
    |____| .__|_| |_|_| |_\\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.2.4.RELEASE)

2020-03-04 11:12:30.673  INFO 12292 --- [jo-jmh-worker-1] o.s.boot.SpringApplication               : Starting application on DESKTOP-AJTC6JT with PID 12292 (started by Administrator in E:\\project\\java\\springBootJmh)
2020-03-04 11:12:30.676  INFO 12292 --- [jo-jmh-worker-1] o.s.boot.SpringApplication               : No active profile set, falling back to default profiles: default
2020-03-04 11:12:31.092  INFO 12292 --- [jo-jmh-worker-1] .s.d.r.c.RepositoryConfigurationDelegate : Multiple Spring Data modules found, entering strict repository configuration mode!
2020-03-04 11:12:31.094  INFO 12292 --- [jo-jmh-worker-1] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data Redis repositories in DEFAULT mode.
2020-03-04 11:12:31.121  INFO 12292 --- [jo-jmh-worker-1] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 15ms. Found 0 Redis repository interfaces.
2020-03-04 11:12:32.013  INFO 12292 --- [jo-jmh-worker-1] o.s.boot.SpringApplication               : Started application in 1.678 seconds (JVM running for 2.34)
2020-03-04 11:12:32.297  INFO 12292 --- [jo-jmh-worker-1] io.lettuce.core.EpollProvider            : Starting without optional epoll library
2020-03-04 11:12:32.299  INFO 12292 --- [jo-jmh-worker-1] io.lettuce.core.KqueueProvider           : Starting without optional kqueue library
7.919 ms/op
Iteration   1: 7.405 ms/op
Iteration   2: 7.021 ms/op
Iteration   3: 7.133 ms/op
Iteration   4: 6.975 ms/op
Iteration   5: 6.915 ms/op
Iteration   6: 6.898 ms/op
Iteration   7: 6.934 ms/op
Iteration   8: 6.939 ms/op
Iteration   9: 6.909 ms/op
Iteration  10: 6.839 ms/op
Iteration  11: 7.037 ms/op
Iteration  12: 7.005 ms/op
Iteration  13: 7.044 ms/op
Iteration  14: 7.009 ms/op
Iteration  15: 6.941 ms/op
Iteration  16: 6.860 ms/op
Iteration  17: 6.848 ms/op
Iteration  18: 6.869 ms/op
Iteration  19: 6.893 ms/op
Iteration  20: 6.874 ms/op


Result "com.springboot.AppTest.testGetPojo":
  6.972 ±(99.9%) 0.053 ms/op [Average]
  (min, avg, max) = (6.839, 6.972, 7.405), stdev = 0.094
  CI (99.9%): [6.919, 7.025] (assumes normal distribution)


# Run complete. Total time: 00:07:07

REMEMBER: The numbers below are just data. To gain reusable insights, you need to follow up on
why the numbers are the way they are. Use profilers (see -prof, -lprof), design factorial
experiments, perform baseline and negative tests that provide experimental control, make sure
the benchmarking environment is safe on JVM/OS/HW level, ask for reviews from the domain experts.
Do not assume the numbers tell you what you want them to tell.

Benchmark            Mode  Cnt  Score   Error  Units
AppTest.testGetPojo  avgt   40  6.972 ± 0.053  ms/op

Process finished with exit code 0

结果：最小值：6.839（最理想值）毫秒,  均值6.972    最大值(最坏情况)7.405

 

3、测试数据

3.1、数据存储方式

"confirm":7,"dead":0,"heal":2,"weight":6.6,"mapId":"c320100_2","updateTime":"2020-03-03 07:20:39","name":"玄武区"

  3.1.1 存到redis缓存中，取出来时候是在java这边是以LinkedHashMap（基于链表方式存储的Hash）

 

 

 

 

 

"\\"id\\":999,\\"distId\\":999,\\"distName\\":\\"玄武区\\",\\"confirm\\":7,\\"suspect\\":0,\\"dead\\":0,\\"heal\\":2,\\"weight\\":6.6,\\"level\\":\\"area\\",\\"mapId\\":\\"c320100_2\\",\\"updateTime\\":\\"2020-03-03 07:20:39\\""

3.1.2、从内存中取出来，在java这里是以String存储的

 

 

 

 

测试代码

RedisTest.java

package com.springboot;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.gson.Gson;
import com.springboot.entity.SnapShot;
import com.springboot.service.CacheService;
import org.junit.Before;
import org.junit.jupiter.api.Test;
import org.modelmapper.ModelMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.context.ConfigurableApplicationContext;

import java.util.Iterator;
import java.util.Map;
@SpringBootTest(classes = App.class)
public class RedisTest 
    private ConfigurableApplicationContext context;

    final Gson gson = new Gson();
    ObjectMapper mapper = new ObjectMapper();

    ModelMapper modelMapper = new ModelMapper();

    @Autowired
    CacheService cacheService;


    /**
     * setup初始化容器的时候只执行一次
     */
    @Before
    public void init()
        context = SpringApplication.run(App.class);
        cacheService = context.getBean(CacheService.class);
    

    @Test
    public void testGetPojo()
    
        Map<String, SnapShot> map = cacheService.getCacheMap("snapshot", SnapShot.class);
        System.out.println(map);
        cacheService.setCacheMap("snapshot1",map);
    

    @Test
    public void testMapToPojo()
    
        Map<String, Map> map = cacheService.getCacheMap("snapshot1");

        for(Iterator<Map.Entry<String, Map>> it = map.entrySet().iterator();it.hasNext();)
        
            Map.Entry<String, Map> entry = it.next();

            SnapShot snapshot = modelMapper.map(entry, SnapShot.class);
        
    

 

4、结论

不使用转义字符的 json形式

"confirm":7,"dead":0,"heal":2,"weight":6.6,"mapId":"c320100_2","updateTime":"2020-03-03 07:20:39","name":"玄武区"

 

比使用转义字符的json：

"\\"id\\":999,\\"distId\\":999,\\"distName\\":\\"玄武区\\",\\"confirm\\":7,\\"suspect\\":0,\\"dead\\":0,\\"heal\\":2,\\"weight\\":6.6,\\"level\\":\\"area\\",\\"mapId\\":\\"c320100_2\\",\\"updateTime\\":\\"2020-03-03 07:20:39\\""

转换成实体快。

 

同样的配置机器，使用不带转义字符的json形式存储，然后再用modelMapper反序列化实体， 均值快2.705毫秒，速度提升2.705/6.972=38.798%

 

笔者最终把上面的<T> Map<String, T> getCacheMap(String key, Class<T> clazz);重构成以下代码

@Override
    public <T> Map<String, T> getCacheMap(String key, Class<T> clazz) 
        Map<String, Object> raw = redisTemplate.opsForHash().entries(key);
        Map<String, T> map = Maps.newLinkedHashMapWithExpectedSize(raw.size());

        for (Map.Entry<String, Object> entry : raw.entrySet()) 
            final String hashKey = entry.getKey();
            final Object value = entry.getValue();

            /***
             * 假设redis中hash值类型存储的hashValue是不带转义字符的json，形如:
             * <code>"confirm":7,"dead":0,"heal":2,"weight":6.6,"mapId":"c320100_2","updateTime":"2020-03-03 07:20:39","name":"玄武区"</code>
             * spring redis template(jedis)会把他转换成LinkedHashMap，这个时候利用ModelMapper将其转换成目标实体类型，速度比带转义字符类型快38.798%
            * */
            if(value instanceof Map)
            
                map.put(hashKey,modelMapper.map(value, clazz));
                //处理带转义字符类型的json字符串
                //"\\"id\\":999,\\"distId\\":999,\\"name\\":\\"玄武区\\",\\"confirm\\":7,\\"suspect\\":0,\\"dead\\":0,\\"heal\\":2,\\"weight\\":6.6,\\"level\\":\\"area\\",\\"mapId\\":\\"c320100_2\\",\\"updateTime\\":\\"2020-03-03 07:20:39\\""
            else if(value instanceof String) 
                map.put(hashKey, gson.fromJson((String)value, clazz));
            
        
        return map;