Profiling Compilation Times

References:

• Profiling Compilation Times
• Clang Build Analyzer
• See++ Compiler Profiler

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Some notes about compilation profiling:

Install clang, something like sudo apt install clang should do the job.

At the ccmake step, use clang instead of gcc and pass the -ftime-trace flag:

• C++ Compiler: /usr/bin/clang++
• C++ flags (Release): -ftime-trace -Wall -Wextra -fopenmp=libomp -pthread -std=c++17 -fvisibility=hidden -mavx -fPIC -O3 -DNDEBUG

Use the Clang Build Analyzer tool, to build it:

• clone it
• in the ClangBuildAnalyzer folder: make -f projects/make/Makefile

Now, to build ViSP with profiling info and to analyse it:

• ./ClangBuildAnalyzer --start <>/visp-clang-build
• make -j (in the <>/visp-clang-build folder)
• ./ClangBuildAnalyzer --stop <>/visp-clang-build visp-clang_build_session_analyse.bin
• ./ClangBuildAnalyzer --analyze visp-clang_build_session_analyse.bin

Information about compilation profiling should be printed in the terminal: Analyzing build trace from 'visp-clang_build_session_analyse.bin'...

You can also use the See++ Compiler Profiler tool for visual profiler information: