On Sat, Mar 9, 2013 at 3:42 PM, Fredrik Gustafsson <iv...@iveqy.com> wrote:
> To improve performance.
BTW, by rolling our own string comparison, we may lose certain
optimizations done by C library. In case of glibc, it may choose to
run an sse4.2 version where 16 bytes are compared at a time. Maybe we
encounter "string not equal" much often than "string equal" and such
an optimization is unncessary, I don't know. Measured numbers say it's
unncessary as my cpu supports sse4.2.
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