My version of Cairo is 2.11000.2. What's yours, Sean? (probably: ls /usr/lib/i386-linux-gnu/libcairo.so*)
On Mon, Apr 21, 2014 at 4:51 PM, Robby Findler <ro...@eecs.northwestern.edu>wrote: > If the versions of Cairo are the same, then that eliminates one > possible route of inquiry. > > Robby > > On Mon, Apr 21, 2014 at 9:45 AM, Laurent <laurent.ors...@gmail.com> wrote: > > Thanks Sean. > > (I forgot to mention that I was testing on Racket 6.0.1.4). > > Apparently it does not lag on your machine, so it might be particular to > my > > machine then? Strange. > > > > > > On Mon, Apr 21, 2014 at 4:32 PM, Sean Kanaley <skana...@gmail.com> > wrote: > >> > >> Here's my log after pasting the source into command-line racket 6.0, > >> Ubuntu 12.04 32-bit: > >> > >> to-draw at 1649 > >> > >> to-draw: cpu time: 0 real time: 2 gc time: 0 > >> on-key a at 2934 > >> to-draw at 2934 > >> > >> to-draw: cpu time: 0 real time: 2 gc time: 0 > >> on-key s at 2970 > >> to-draw at 2970 > >> > >> to-draw: cpu time: 4 real time: 3 gc time: 0 > >> on-key d at 3044 > >> on-key f at 3044 > >> to-draw at 3045 > >> > >> to-draw: cpu time: 0 real time: 0 gc time: 0 > >> to-draw at 3069 > >> to-draw: cpu time: 0 real time: 1 gc time: 0 > >> on-key a at 3198 > >> on-key s at 3198 > >> to-draw at 3199 > >> > >> to-draw: cpu time: 4 real time: 3 gc time: 0 > >> to-draw at 3329 > >> > >> to-draw: cpu time: 4 real time: 1 gc time: 0 > >> to-draw at 3392 > >> to-draw: cpu time: 0 real time: 1 gc time: 0 > >> on-key g at 3430 > >> on-key j at 3430 > >> on-key k at 3430 > >> to-draw at 3430 > >> > >> to-draw: cpu time: 4 real time: 1 gc time: 0 > >> to-draw at 3467 > >> to-draw: cpu time: 0 real time: 1 gc time: 0 > >> on-key a at 3504 > >> on-key l at 3504 > >> to-draw at 3505 > >> > >> to-draw: cpu time: 0 real time: 1 gc time: 0 > >> to-draw at 3547 > >> > >> to-draw: cpu time: 4 real time: 1 gc time: 0 > >> to-draw at 3572 > >> to-draw: cpu time: 0 real time: 1 gc time: 0 > >> on-key h at 3602 > >> to-draw at 3602 > >> to-draw: cpu time: 0 real time: 1 gc time: 0 > >> on-key k at 3659 > >> on-key ; at 3659 > >> to-draw at 3659 > >> > >> to-draw: cpu time: 4 real time: 3 gc time: 0 > >> to-draw at 3689 > >> > >> to-draw: cpu time: 0 real time: 1 gc time: 0 > >> to-draw at 3725 > >> > >> to-draw: cpu time: 0 real time: 1 gc time: 0 > >> to-draw at 3776 > >> to-draw: cpu time: 0 real time: 1 gc time: 0 > >> > >> > >> > >> On Mon, Apr 21, 2014 at 10:00 AM, Laurent <laurent.ors...@gmail.com> > >> wrote: > >>> > >>> I have a 2htdp/universe program that used to run fast enough a few > months > >>> ago, but now it is very slow and not usable. > >>> The slowness seems to be because of the on-screen rendering, and not > >>> because of the generation of the image. > >>> > >>> Here is a stripped-down version that shows this behavior: > >>> https://gist.github.com/Metaxal/11142941 > >>> > >>> In the following log, you see that the `on-key` events are very close > one > >>> to the other (in milliseconds after the beginning of the program), but > the > >>> corresponding `to-draw` events are separated by more than a second, > even > >>> though generating the image (cpu time) takes almost no time: > >>> > >>> on-key a at 6906 > >>> on-key u at 6912 > >>> on-key i at 6912 > >>> on-key e at 6913 > >>> to-draw at 6913 > >>> to-draw: cpu time: 4 real time: 3 gc time: 0 > >>> to-draw at 8598 > >>> to-draw: cpu time: 4 real time: 2 gc time: 0 > >>> to-draw at 11948 > >>> to-draw: cpu time: 4 real time: 2 gc time: 0 > >>> to-draw at 13631 > >>> to-draw: cpu time: 0 real time: 2 gc time: 0 > >>> to-draw at 161839 > >>> to-draw: cpu time: 4 real time: 9 gc time: 0 > >>> > >>> During those long seconds, Xorg is almost at 100% cpu. > >>> > >>> However, using an empty scene instead of an image is fast. > >>> The time also depends on the size of the grid. > >>> > >>> I'm using Ubuntu 12.04 64bits. > >>> I have tried to replicate the behavior on older versions of racket > (5.3.1 > >>> and 5.90.0.9) but it's the same. So maybe the problem is not on > Racket's > >>> side but something has changed in Ubuntu? > >>> > >>> Does anyone else see the same behavior, either on the same platform or > on > >>> a different one? > >>> > >>> Thanks, > >>> Laurent > >>> > >>> > >>> ____________________ > >>> Racket Users list: > >>> http://lists.racket-lang.org/users > >>> > >> > > > > > > ____________________ > > Racket Users list: > > http://lists.racket-lang.org/users > > >
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