Gregory Szorc wrote:
I have a patch at https://hg.stage.mozaws.net/gecko-collab/rev/d6ea4c36aa65 that will change the build system to measure different phases of compiler execution. For each compile command, it essentially runs -E + -fsyntax-only + -c as separate commands and measures the results.
Note that -E has a significant overhead on Windows; when I switched configure's header detection tests from -E to -c it shaved a noticeable fraction off its run time.
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