Reduce compile time #6
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Halbaroth
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This PR reduces the huge compile time by a factor of two. I caught the guilty template using the profiler features of `clang++`. Basically, configure the project with ``` CXX=/usr/bin/clang++ CXXFLAGS="-ftime-trace" ./configure ``` will activate the profiler and `clang++` produces a json file per compilation unit. The compiler instantiates massively the template `spdlog::pattern_formatter::handle_flag_` from the spdlog library. It is a well known issue (see for instance the issue gabime/spdlog#1708). The solution consists in using the compiled version of the library with the flag `-DSPDLOG_COMPILED_LIB`. Before this commit, the compile time for the complete project was around 3m30s on my laptop. After this commit, it is 1m50s. The size of the runtime is 69M.
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This PR reduces the huge compile time by a factor of two. I caught the
guilty template using the profiler features of
clang++. Basically,configure the project with
will activate the profiler and
clang++produces a json file percompilation unit. The compiler instantiates massively the template
spdlog::pattern_formatter::handle_flag_from the spdlog library. It is a well known issue (see for instance the issue gabime/spdlog#1708). The solution consists in using the compiled version of the library with the flag-DSPDLOG_COMPILED_LIB.Before this commit, the compile time for the complete project was around
3m30s on my laptop. After this commit, it is 1m50s.
The size of the runtime is 69M.