From: Linus Torvalds <torvalds@osdl.org>
To: Junio C Hamano <junkio@cox.net>
Cc: Fredrik Kuivinen <freku045@student.liu.se>, git@vger.kernel.org
Subject: Re: git-diff-tree -M performance regression in 'next'
Date: Sun, 12 Mar 2006 17:31:39 -0800 (PST) [thread overview]
Message-ID: <Pine.LNX.4.64.0603121730310.3618@g5.osdl.org> (raw)
In-Reply-To: <Pine.LNX.4.64.0603121710110.3618@g5.osdl.org>
On Sun, 12 Mar 2006, Linus Torvalds wrote:
>
> u64 value = *(u64 *)src;
> src += 8;
> hash = value % 4294967291u;
Btw, this assumes the "only hash every 8 bytes" at the source, in which
case this is ok even on architectures that need aligned reads. For the
non-aligned reads, you'd need your "shift the value" approach.
Linus
next prev parent reply other threads:[~2006-03-13 1:31 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-11 17:28 git-diff-tree -M performance regression in 'next' Fredrik Kuivinen
2006-03-12 3:10 ` Junio C Hamano
2006-03-12 12:28 ` Junio C Hamano
2006-03-12 17:00 ` Linus Torvalds
2006-03-12 19:34 ` Junio C Hamano
2006-03-13 0:42 ` Junio C Hamano
2006-03-13 1:09 ` Linus Torvalds
2006-03-13 1:22 ` Junio C Hamano
2006-03-13 1:39 ` Linus Torvalds
2006-03-13 1:29 ` Linus Torvalds
2006-03-13 1:31 ` Linus Torvalds [this message]
2006-03-13 2:29 ` Linus Torvalds
2006-03-13 2:53 ` Linus Torvalds
2006-03-13 4:14 ` Junio C Hamano
2006-03-14 2:55 ` Junio C Hamano
2006-03-14 3:47 ` Linus Torvalds
2006-03-14 10:26 ` Junio C Hamano
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