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| author | jilles <jilles@FreeBSD.org> | 2010-10-01 13:10:11 +0000 |
|---|---|---|
| committer | jilles <jilles@FreeBSD.org> | 2010-10-01 13:10:11 +0000 |
| commit | d1afef8be57ed26602c57190abd66f744f580a4c (patch) | |
| tree | f673f61b959f822e54ed050a00b32ad578882c75 /tools | |
| parent | 35c65502b901091ef76d27653bcc588fa8117194 (diff) | |
| download | FreeBSD-src-d1afef8be57ed26602c57190abd66f744f580a4c.zip FreeBSD-src-d1afef8be57ed26602c57190abd66f744f580a4c.tar.gz | |
libc: Remove the i386 assembler version of strlen(3).
On anything modern, the C version, which processes a word at a time, is much
faster. The Intel optimization manual explicitly warns against using REP
prefixes with SCAS or CMPS, which is exactly what the assembler version
does.
A simple test on a Phenom II showed the C version, compiled with -O2, to be
about twice as fast determining the length of 100000 strings between 0 and
255 bytes long.
MFC after: 2 weeks
Diffstat (limited to 'tools')
0 files changed, 0 insertions, 0 deletions
