Date: Tue, 4 Apr 2006 03:51:47 +0000 (UTC) From: Jason Evans <jasone@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/lib/libc/stdlib malloc.c Message-ID: <200604040351.k343pl5k095042@repoman.freebsd.org>
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jasone 2006-04-04 03:51:47 UTC
FreeBSD src repository
Modified files:
lib/libc/stdlib malloc.c
Log:
Refactor per-run bitmap manipulation functions so that bitmap offsets only
have to be calculated once per allocator operation.
Make nil const.
Update various comments.
Remove/avoid division where possible.
For the one division operation that remains in the critical path, add a
switch statement that has a case for each small size class, and do division
with a constant divisor in each case. This allows the compiler to generate
optimized code that does not use hardware division [1].
Obtained from: peter [1]
Revision Changes Path
1.121 +131 -69 src/lib/libc/stdlib/malloc.c
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