Re: [PATCH 5/5] tree-walk: match_entry microoptimization

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On Sat, Apr 2, 2011 at 4:06 AM, Nguyen Thai Ngoc Duy <pclouds@xxxxxxxxx> wrote:
> On Thu, Mar 31, 2011 at 8:38 AM, Dan McGee <dpmcgee@xxxxxxxxx> wrote:
>> Before calling strncmp(), see if we can get away with checking only the
>> first character of the passed path components instead.
>>
>> Signed-off-by: Dan McGee <dpmcgee@xxxxxxxxx>
>
> I wonder if inlining strcmp() would be better (at least cleaner code).
> It seems like you try to avoid the function call cost here.

100% agree with you, but I have no idea how to do that. Realize also
you can use memcmp() here; I tried that and got no noticeable gain
(likely due to how short these strings are). However, it is what we
use in most other functions in this file. I assume the compiler would
inline versions with a static length, but if you have suggestions as
to how to inline a non-trivial version here I'm all ears.

-Dan
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