Re: Assembly string functions in i386 libc

On Wed, 11 Jul 2007, Matthew Dillon wrote:

Long ago I decided that strlen() was simply not in the critical
path for virtually any program. A few nanoseconds here or there is
not going to result in any noticeable improvement for any program
other then a benchmark designed to test strlen(). It isn't worth
the effort to optimize.

Since strlen() is used in every program directly or indirectly through
libc, I thought it was beneficial to make it faster. In the case of
i386, the C version used by all the other architectures, except for ARM,
is much faster that the assembly version. This is without any
optimization on its part.

I need to test out grep (FreeGrep) to see how it behaves when calling
regexec() (may use strlen() in certain cases) many times (i.e., grep -R
on the source tree) using both versions.

Sean
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