Well, should be good know what is happening, but these are real timings. I know the theory, and that probably was one of the reasons this was not done before, but this was what I found.
Gonzalo On Fri, Nov 8, 2013 at 6:08 PM, Daniel Narvaez <dwnarv...@gmail.com> wrote: > Even more confused now... > > The two evince imports you are moving doesn't even cause the dynamic > library to be loaded, so they should have absolutely no performance impact. > > That's the normal case in gobject-introspection, libraries are loaded > lazily, when you try to use one of the functions. > > Gtk is an exception because gtk_init is called automatically on import and > there are probably other libraries that do something similar. Though I > verified that's not the case for Evince by looking at the smaps. > > > On 8 November 2013 19:44, Gonzalo Odiard <gonz...@laptop.org> wrote: > >> There are many issues in Sugar regarding performance, >> but one of the more visible to the user is how much time the activities >> take to start. This is not so evident in newer hardware, >> but is important in XO-1. Is so important than by example, Peru will use >> sugar 0.94 >> instead of a newer because o this. >> >> I was doing some testing with the main activities: >> >> >> https://docs.google.com/spreadsheet/ccc?key=0As_jQJX0Me6XdDI2clFpX1FFRHhKMHVFZGkyakdST2c&usp=drive_web#gid=0 >> >> (These measures were done in a XO-1) >> >> I first blamed to the port from gtk2 to gtk3 of the big regressions in >> performance, >> but after looking with a little of detail, some can be solved easily. >> >> One of the arguments of the dynamic bindings was a better startup time >> due to not need initialize all the libraries until is needed use them. Then >> the import should >> be lighter than before. Looks like that is not so true. >> >> In the case of Write activity, I was able to reduce the start up in 7 or >> 8 seconds, just delaying the gstreamer initialization [1], and 1 or 2 >> seconds more delaying two other imports. >> >> In the case of Browse activity, just delaying the import of Evince >> libraries to the moment when a pdf is opened, improve the start up time in >> 13 seconds (patch attached). The start up time is even better than the >> version in 0.94 >> >> I think this work of identify big libraries used only in specific moments, >> can be applied in other cases. >> >> Gonzalo >> >> [1] >> http://git.sugarlabs.org/write/mainline/commit/5dd843cf415d0c65e2927540225b0098f2b71cd0 >> [2] >> http://git.sugarlabs.org/write/mainline/commit/dba223f5749f510735692a06f246acee30ab50bf >> >> >> _______________________________________________ >> Sugar-devel mailing list >> Sugar-devel@lists.sugarlabs.org >> http://lists.sugarlabs.org/listinfo/sugar-devel >> >> > > > -- > Daniel Narvaez >
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