Alan W. Irwin wrote: > On 2009-04-04 22:49-0400 Hazen Babcock wrote: > >>> I have a slightly more recent version of pangocairo (1.22.2) and I also get >>> pretty much identical rendering speeds with text_clipping on or off. >> And now I'm not so sure about this result. Alan, can you try with the xcairo >> driver? It seems noticeably slower to me now with text_clipping on. Slow >> enough that I can almost see it drawing each string. > > I measure no significant difference. I held down the return key (to go > through the pages as quickly as possible) and got consistent timings (using > the time command) with text clipping and consistent timings without text > clipping. And without was consistently faster. But the difference was only > 0.01 seconds, i.e., negligible. So device xcairo is consistent with the > other cairo devices (none of which showed large changes in speed between > text clipping on or off). > > I wonder if your recent rewrite of text handling in cairo is a factor. The > above test was without your recent changes, i.e., revision 9774 of cairo.c. > You might want to repeat your test with that revision. Also, I would highly > advise using the time command (or whatever is equivalent on Mac OS X) to > measure your timing results.
I thought that might be the issue but the speed was the same with & without this change. Instead it looks like the issue is somehow related to X forwarding with SSH. If I run the examples directly on my linux box the text rendering speed is pretty much the same with and without clipping, but if I use X forwarding to display the examples on my OS-X box then I can see a significant difference. A little puzzling, but probably not a reason to go back to the no text clipping default. -Hazen ------------------------------------------------------------------------------ _______________________________________________ Plplot-devel mailing list Plplot-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/plplot-devel
