package_rpm: use zstd's default compression level

zstd uses 3 by default, 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: Steve Sakoman <steve@sakoman.com>

diff --git a/meta/classes/package_rpm.bbclass b/meta/classes/package_rpm.bbclass
index f403af53439c76440de4324dca6ae7cbdce0b1c0..198a6d0afdaf6c398fe4ee029427150853ce2c71 100644 (file)
--- a/meta/classes/package_rpm.bbclass
+++ b/meta/classes/package_rpm.bbclass
@@ -4,7 +4,7 @@ IMAGE_PKGTYPE ?= "rpm"
 
 RPM="rpm"
 RPMBUILD="rpmbuild"
-RPMBUILD_COMPMODE ?= "${@'w19T%d.zstdio' % int(d.getVar('ZSTD_THREADS'))}"
+RPMBUILD_COMPMODE ?= "${@'w3T%d.zstdio' % int(d.getVar('ZSTD_THREADS'))}"
 
 PKGWRITEDIRRPM = "${WORKDIR}/deploy-rpms"