linux-kernel - Re: [f2fs-dev] [PATCH v6] f2fs: compress: support compress level

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Date:   Fri, 4 Dec 2020 15:09:20 +0800
From:   Chao Yu <yuchao0@...wei.com>
To:     Gao Xiang <hsiangkao@...hat.com>
CC:     Eric Biggers <ebiggers@...nel.org>, <jaegeuk@...nel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-f2fs-devel@...ts.sourceforge.net>
Subject: Re: [f2fs-dev] [PATCH v6] f2fs: compress: support compress level

On 2020/12/4 8:31, Gao Xiang wrote:
> could make more sense), could you leave some CR numbers about these
> algorithms on typical datasets (enwik9, silisia.tar or else.) with 16k
> cluster size?

Just from a quick test with enwik9 on vm:

Original blocks:	244382

			lz4			lz4hc-9
compressed blocks	170647			163270
compress ratio		69.8%			66.8%
speed			16.4207 s, 60.9 MB/s	26.7299 s, 37.4 MB/s

compress ratio = after / before

Thanks,