linux-kernel - Re: [PATCH 2/3] lib: zlib_inflate: improves decompression performance

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Date:   Wed, 11 Nov 2020 04:46:01 +0100
From:   Jann Horn <jannh@...gle.com>
To:     zengzhaoxiu@....com
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        kernel list <linux-kernel@...r.kernel.org>,
        Zhaoxiu Zeng <zhaoxiu.zeng@...il.com>
Subject: Re: [PATCH 2/3] lib: zlib_inflate: improves decompression performance

On Mon, Nov 9, 2020 at 8:27 PM <zengzhaoxiu@....com> wrote:
> This patch does:
> 1. Cleanup code and reduce branches
> 2. Use copy_from_back to copy the matched bytes from the back output buffer

What exactly is copy_from_back()? Is it like memmove()? If yes, have
you tried using memmove() instead of the code added in patch 1/3?