From: Duy Nguyen <pclouds@gmail.com>
Date: Sat, 09 Mar 2013 10:40:55 GMT
Subject: Re: [PATCH] Replace strcmp_icase with strequal_icase
Message-ID: <CACsJy8CphBDKsAAKjCoze98jv=4U+3pN3cW1OYD5XNhYgfcVCA@mail.gmail.com>
In-Reply-To: <1362818574-16873-1-git-send-email-iveqy@iveqy.com>

On Sat, Mar 9, 2013 at 3:42 PM, Fredrik Gustafsson <iveqy@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.
-- 
Duy