2010/12/20 Maarten Maathuis <[email protected]>: > 2010/12/20 Michel Dänzer <[email protected]>: >> On Mon, 2010-12-20 at 15:46 +0100, Maarten Maathuis wrote: >>> 2010/12/14 Michel Dänzer <[email protected]>: >>> > On Mon, 2010-12-13 at 19:42 +0100, Maarten Maathuis wrote: >>> >> - Apps like xterm can trigger a lot of fallback rendering. >>> >> - This can lead to (annoyingly) high latencies, because you >>> >> have to wait for the block handler. >>> >> - You need a driver that doesn't directly access the front >>> >> buffer to trigger this (NV50+ nouveau for example). >>> >> - Repeatingly doing dmesg on an xterm with a bitmap font >>> >> will reveal that you never see part of the text. >>> >> - I have recieved at least one complaint in the past of slow >>> >> terminal performance, which was related to core font >>> >> rendering. >>> >> - This does sacrifice some throughput, not sure how much, >>> > >>> > Shouldn't be hard to measure. >>> >>> I did a little test (catting a saved copy of dmesg) and the throughput >>> loss is about 25%. >> >> What are the absolute numbers? > > Roughly 250 ms vs 330 ms (error margin is about 20-30 ms if i had to guess).
Which reminds me i should have said 33% slower (calculated from the wrong basevalue). > >> >> >> -- >> Earthling Michel Dänzer | http://www.vmware.com >> Libre software enthusiast | Debian, X and DRI developer >> > > > > -- > Far away from the primal instinct, the song seems to fade away, the > river get wider between your thoughts and the things we do and say. > -- Far away from the primal instinct, the song seems to fade away, the river get wider between your thoughts and the things we do and say. _______________________________________________ [email protected]: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: http://lists.x.org/mailman/listinfo/xorg-devel
