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Wed, 28 Sep 2022 18:03:50 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/171152 Thanks for doing the research. What was the build time on the zstd L19 compression vs. xz? Was there=20 still an improvement? On 9/28/22 11:50, Etienne Cordonnier wrote: > I tested it a bit more today. I used the standard poky's local.conf=20 > and added those lines. You can see that at zstd level 9 there is still=20 > a significant difference in the compression ratio with xz for gcc-dbg=20 > which is a big file. At zstd level 19, gcc-dbg is 241MB big instead of=20 > 214MB with xz (12.6% more). > > PACKAGE_CLASSES =3D "package_ipk" > ZSTD_DEFAULTS =3D "-T0 -19" > PACKAGECONFIG:append:pn-opkg-native =3D " zstd" > OPKGBUILDCMD =3D "opkg-build -Z zstd -a ${ZSTD_DEFAULTS}" > > Zstd at level 9: > > build$ ls -lh tmp-zstd-level9/deploy/ipk/core2-64/ =C2=A0--sort=3Dsize = | head=20 > -n10 > total 1.5G > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0302M Sep 28 18:33=20 > gcc-dbg_12.2.0-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0249M Sep 28 18:33=20 > openssl-dbg_3.0.5-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0106M Sep 28 18:33=20 > openssl-ptest_3.0.5-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0 44M Sep 28 18:33=20 > binutils-dbg_2.39-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0 26M Sep 28 18:33=20 > perl-ptest_5.36.0-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0 23M Sep 28 18:33=20 > gcc_12.2.0-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0 15M Sep 28 18:32=20 > elfutils-ptest_0.187-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0 15M Sep 28 18:33=20 > gcc-src_12.2.0-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0 13M Sep 28 18:33=20 > coreutils-dbg_9.1-r0_core2-64.ipk > > zstd at level 19: > > build$ ls -lh tmp-zstd-level19/deploy/ipk/core2-64/ =C2=A0--sort=3Dsize= |=20 > head -n10 > total 1.1G > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0241M Sep 28 18:04=20 > gcc-dbg_12.2.0-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0213M Sep 28 18:03=20 > openssl-dbg_3.0.5-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0 36M Sep 28 17:58=20 > binutils-dbg_2.39-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0 30M Sep 28 18:00=20 > openssl-ptest_3.0.5-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0 22M Sep 28 17:59=20 > perl-ptest_5.36.0-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0 20M Sep 28 17:58=20 > gcc_12.2.0-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0 14M Sep 28 17:57=20 > elfutils-ptest_0.187-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0 12M Sep 28 17:58=20 > gcc-src_12.2.0-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0 12M Sep 28 17:57=20 > g++_12.2.0-r0_core2-64.ipk > > xz at level 9 (the default): > > build$ ls -lh tmp-xz/deploy/ipk/core2-64/ =C2=A0--sort=3Dsize | head -n= 10 > total 963M > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0214M Sep 14 10:44=20 > gcc-dbg_12.2.0-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0193M Sep 14 10:44=20 > openssl-dbg_3.0.5-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0 35M Sep 14 10:44=20 > openssl-ptest_3.0.5-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0 32M Sep 14 10:44=20 > binutils-dbg_2.39-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0 20M Sep 14 10:44=20 > perl-ptest_5.36.0-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0 19M Sep 14 10:44=20 > gcc_12.2.0-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0 13M Sep 14 10:44=20 > elfutils-ptest_0.187-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0 12M Sep 14 10:44=20 > gcc-src_12.2.0-r0_core2-64.ipk > -rw-r--r-- 3 ecordonnier ecordonnier =C2=A0 11M Sep 14 10:44=20 > g++_12.2.0-r0_core2-64.ipk > > On Wed, Sep 14, 2022 at 5:42 PM Khem Raj wrote: > > On Wed, Sep 14, 2022 at 8:37 AM Alex Stewart > wrote: > > > > Thanks for checking. > > > > I'd be interested to know if setting a higher compression level > for zstd > > can get us to a similar compression ratio to xz. If so, then I > think it > > could be some real value to distro maintainers to be able to *tun= e* > > their compression. > > yeah it will be interesting to say try something like level 9 but > I think times > might regress with that but it might be good to know the balance > and perhaps > suggest size mode and performance mode of zstd instead of xz > --=20 Alex Stewart Software Engineer - NI Real-Time OS NI (National Instruments) alex.stewart@ni.com