[Webkit-unassigned] [Bug 212500] REGRESSION (r262245): WebCore's "Check .xcfilelists" build phase is ~100x slower

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=212500

--- Comment #8 from Darin Adler <darin at apple.com> ---
It’s possible that make now knows about a lot more dependencies, so the output of "make -d" is much bigger, and either make itself is slow, or the code to process it is slow when there's a lot of data.

It’s possible the invocation of "make -d" is not passing the same environment variables that generate-derived-sources.sh is, leading to something particularly slow.

But neither of those things seems particularly likely. I think we have a mystery.

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