Date: Thu, 30 Mar 2006 20:25:52 +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: <200603302025.k2UKPqs8072476@repoman.freebsd.org>
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jasone 2006-03-30 20:25:52 UTC
FreeBSD src repository
Modified files:
lib/libc/stdlib malloc.c
Log:
Optimize runtime performance, primary using the following techniques:
* Avoid choosing an arena until it's certain that an arena is needed
for allocation.
* Convert division/multiplication to bitshifting where possible.
* Avoid accessing TLS variables in single-threaded code.
* Reduce the amount of pointer dereferencing.
* Move lock acquisition in critical paths to only protect the the code
that requires synchronization, and completely remove locking where
possible.
Revision Changes Path
1.120 +294 -285 src/lib/libc/stdlib/malloc.c
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