[An Introduction to GCC 学习笔记] 16 gprof, gcov

Posted 2022-12-06 漫小牛

Compiler-related Tools

• The GNU profiler gprof is a useful tool for measuring the performance of a program - it records the number of calls to each function and the amount of time spent there, on a perfunction basis. Functions which consume a large fraction of the run-time can be identified easily from the output of gprof. Efforts to speed up a program should concentrate first on those functions which dominate the total run-time.
• The GNU coverage testing tool gcov analysis the number of times each line of a program is executed during a run. This makes it possible to find areas of the code which are not used, or which are note exercised in testing. When combined with profiling information from gprof, the information from coverage testing allows efforts to speed up a program to be concentrated on specific lines of the source code.

Summary

In this lesson, you should have learned:

• The history and major features of GCC.
• The basic skills of GCC.
• How the compiler works.