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bitbake: build.py: Only execute mkdirhier if stampdir doesn't exist

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I noticed this was showing up on profile logs as a sigificant time user
in "bitbake bash" when bash was already built. It reduces the time from
5.2 to 4.5 seconds in my test environment.

We make use of the parser's mtime cache as once a directory exists,
we can assume it continues to exist and this avoids syscalls.

(Bitbake rev: 769b694eeb617bb793bd79d0d7b29c43d2646ece)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Richard Purdie 2012-08-15 16:57:47 +01:00
parent e2d023ff5f
commit 2718537b4b
1 changed files with 3 additions and 1 deletions
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4
bitbake/lib/bb/build.py
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@ -464,7 +464,9 @@ def stamp_internal(taskname, d, file_name):
stamp = bb.parse.siggen.stampfile(stamp, file_name, taskname, extrainfo)
bb.utils.mkdirhier(os.path.dirname(stamp))
stampdir = os.path.dirname(stamp)
if bb.parse.cached_mtime_noerror == 0:
bb.utils.mkdirhier(stampdir)
return stamp