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by usefulcat
2723 days ago
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IME, using precompiled headers with gcc is largely a waste of time. I desperately wanted it to be otherwise. I tried many variants: including everything, nothing, a few select, commonly used headers. No matter what I tried, nothing was faster than no PCH. This is a project that has ~90k LOC in 136 object files and compiles in about 2 minutes on 64 cores. Yes, I was measuring time to rebuild everything (including the PCH) from scratch. So it's probable that incremental compilation is slightly faster using PCH, it's just not nearly as much as I was hoping for. |
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