From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751453AbdIMHMu (ORCPT ); Wed, 13 Sep 2017 03:12:50 -0400 Received: from LGEAMRELO11.lge.com ([156.147.23.51]:53579 "EHLO lgeamrelo11.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750993AbdIMHMs (ORCPT ); Wed, 13 Sep 2017 03:12:48 -0400 X-Original-SENDERIP: 156.147.1.151 X-Original-MAILFROM: minchan@kernel.org X-Original-SENDERIP: 10.177.220.163 X-Original-MAILFROM: minchan@kernel.org Date: Wed, 13 Sep 2017 16:12:46 +0900 From: Minchan Kim To: Sergey Senozhatsky Cc: Andrew Morton , linux-kernel@vger.kernel.org, Sergey Senozhatsky Subject: Re: [PATCH 2/2] zram: remove zlib from the list of recommended algorithms Message-ID: <20170913071246.GB2975@bbox> References: <20170912050005.3247-1-sergey.senozhatsky@gmail.com> <20170912050005.3247-2-sergey.senozhatsky@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170912050005.3247-2-sergey.senozhatsky@gmail.com> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Sep 12, 2017 at 02:00:05PM +0900, Sergey Senozhatsky wrote: > ZSTD tends to outperform deflate/inflate, thus we remove > zlib from the list of recommended algorithms and recommend > zstd instead. > > Signed-off-by: Sergey Senozhatsky > Suggested-by: Minchan Kim I did test with my sample data and compared zstd with deflate. zstd's compress ratio is lower a little bit but compression speed is much faster 3 times more and decompress speed is too 2 times more. With different data, it is different but overall, zstd would be better for speed at the cost of a little lower compress ratio(about 5%) so I believe it's worth to replace deflate. Thanks for the patch, Sergey. Acked-by: Minchan Kim