How To Profile Compilation Duration?
summary
Project starts with full build + tests at 15 minutes and grows to ≈1 hour; profiling uses -ftime-report (g++) and -ftime-trace (clang) plus Boost profile templates. Concrete example: a templated function called with six types produces 36 instantiations; collapsing signatures via implicit conversions drops to five instantiations, yields a smaller binary and cuts a measurable chunk (about 20%) of compile time. Focus on counting instantiations, compiler-time hotspots, and refactoring heavy templates.
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