Ronny V. Vindenes wrote: > While testing 2.3.91 I noticed a huge performance regression compared to > 2.3.2 (Fedora rawhide). > > If I keep my fonts[1] in several subdirectories[2], rendering pages in > epiphany[3] takes a very long time (2-3 seconds with 100% cpu load) even > for short pages using a single font (clicking through to other pages > using the same font takes as long as well), but if I put all the fonts > in a single directory things are rendered at the expected speed. In the current configuration, every directory has an in-memory bank and an associated bank id (randomly generated). fontconfig currently uses linear search to locate bank ids in a table, and I bet that's what's causing your problem. I implemented a naive bank lookup algorithm first and was waiting to see if anyone would complain about it being slow. Obviously it is, so I'll commit a patch which makes the list a move-to-front list, which ought to be a sufficiently sophisticated data structure for this purpose. This ought to solve your performance problems. I'll let you know when I've implemented it. pat
