iris is slower than i965 for gnome-shell
iris is much slower than i965 for gnome-shell. Using an i7-7700 (GT2) at 3840x2160 on Ubuntu 20.10, Mesa version 20.1.2-1ubuntu1. Also confirmed in 20.2.0-devel...
A couple of tests (milliseconds per frame):
Config | iris | i965 |
---|---|---|
Old: Single channel cheap RAM | 6.0 | 4.5 |
New: Dual channel less cheap RAM | 5.1 | 2.5 |