[ANN] libwebp 0.6.1 release candidate

50 views
Skip to first unread message

James Zern

unread,
Nov 25, 2017, 10:39:45 PM11/25/17
to WebP Discussion
Hi,

Source and binary archives are available [1]. There have been the usual bug
fixes and performance improvements as well as new features and tools added. The
library is compatible with the previous release so everyone is encouraged to
update. This will be finalized in the next few days if there aren't any
regressions.

From the NEWS file:
- 11/24/2017: version 0.6.1
  This is a binary compatible release.
  * lossless performance and compression improvements + a new 'cruncher' mode
    (-m 6 -q 100)
  * ARM performance improvements with clang (15-20% w/ndk r15c, issue #339)
  * webp-js: emscripten/webassembly based javascript decoder
  * miscellaneous bug & build fixes (issue #329, #332, #343, #353, #360, #361,
    #363)
  Tool updates / additions:
    added webpinfo - prints file format information (issue #330)
    gif2webp - loop behavior modified to match Chrome M63+ (crbug.com/649264);
               '-loop_compatibility' can be used for the old behavior

[1]

James Zern

unread,
Nov 28, 2017, 5:45:52 PM11/28/17
to WebP Discussion


On Saturday, November 25, 2017 at 7:39:45 PM UTC-8, James Zern wrote:
Hi,

Source and binary archives are available [1]. There have been the usual bug
fixes and performance improvements as well as new features and tools added. The
library is compatible with the previous release so everyone is encouraged to
update. This will be finalized in the next few days if there aren't any
regressions.

I tagged v0.6.1, the archives are available [2]. There was only one change after rc2:
f66955de WEBP_REDUCE_CSP: restrict colorspace support
[2]
 

gnet...@gmail.com

unread,
Dec 2, 2017, 2:02:32 AM12/2/17
to WebP Discussion
could you show us more information about performance improvement and compression improvements, do you have compare the performance vs 0.6.0, thanks in advance.

在 2017年11月26日星期日 UTC+8上午11:39:45，James Zern写道：

James Zern

unread,
Dec 5, 2017, 1:30:23 AM12/5/17
to WebP Discussion


On Friday, December 1, 2017 at 11:02:32 PM UTC-8, gnet...@gmail.com wrote:
could you show us more information about performance improvement and compression improvements, do you have compare the performance vs 0.6.0, thanks in advance.

The most visible performance (i.e., speed) improvement will be with newer NDKs which default to clang. For those we were incorrectly avoiding some NEON code; decode saw a 15-20% improvement. For lossless the cruncher (-m 6 -q 100) was the biggest change, using that, though slower, will produce the most dense output. There were some other opportunistic cleanups, but I don't have a full rundown or comparison to 0.6.0 specifically. This release contained other bug fixes as well, it's compatible so it's a safe upgrade.

gnet...@gmail.com

unread,
Dec 5, 2017, 6:08:08 AM12/5/17
to WebP Discussion
thanks for your reply, it really a great imporvement to me, i will upgrade it have a test myself.

在 2017年12月5日星期二 UTC+8下午2:30:23，James Zern写道：
Reply all
Reply to author
Forward
0 new messages