package_rpm: use zstd's default compression level

zstd uses 3 by default (and ZSTD_COMPRESSION_LEVEL is set to that),
while 19 is the highest and slowest.

It's not clear why 19 was picked to begin with, possibly
I copy-pasted it from rpm's examples without thinking:
https://git.yoctoproject.org/poky/commit/?h=master-next&id=4a4d5f78a6962dda5f63e9891825c80a8a87bf66

This brings significant speedups in rpm's compression step:
for example compressing webkitgtk takes 11s instead of 36s.

The rpm size increases from 175648k to 234860k. I think it's
a worthy default tradeoff.

Signed-off-by: Alexander Kanavin <alex@linutronix.de>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/meta/classes-global/package_rpm.bbclass b/meta/classes-global/package_rpm.bbclass
index ddc4bf3a6a51b76349b2aea4f2ceebebd18c152f..fab8f568781765d1b5d4d43918b97151e5678087 100644 (file)
--- a/meta/classes-global/package_rpm.bbclass
+++ b/meta/classes-global/package_rpm.bbclass
@@ -10,7 +10,7 @@ IMAGE_PKGTYPE ?= "rpm"
 
 RPM = "rpm"
 RPMBUILD = "rpmbuild"
-RPMBUILD_COMPMODE ?= "${@'w19T%d.zstdio' % int(d.getVar('ZSTD_THREADS'))}"
+RPMBUILD_COMPMODE ?= "${@'w%dT%d.zstdio' % (int(d.getVar('ZSTD_COMPRESSION_LEVEL')), int(d.getVar('ZSTD_THREADS')))}"
 
 PKGWRITEDIRRPM = "${WORKDIR}/deploy-rpms"