On Sat, Mar 9, 2013 at 5:40 PM, Duy Nguyen <pclo...@gmail.com> wrote:
> 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.
Another problem is locale. Git's toupper() does not care about locale,
which should be fine in most cases. strcasecmp is locale-aware, our
new str[n]equal_icase is not. It probably does not matter for
(ascii-based) pathnames, I guess. core.ignorecase users, any comments?
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