does not work for me on ubuntu it keeps saying that "cannot locate cairo library" even though its installed via
sudo apt-get install libcairo2-dev By the way just for the fun, I will make a benchmark comparison betweem PNG loader in pharo and SDL in C to see what is the speed difference and dust off my C skills. On Tue, Jan 19, 2016 at 2:22 PM Esteban Lorenzano <esteba...@gmail.com> wrote: > Yesterday I tested creating PNGs from disk using Athens: > > [(AthensCairoSurface > createFromFile: '/Users/esteban/Dev/Pharo/pharo50/Lenna.png' > ifFailed: [ ]) > asForm] bench. > > That gave me 46k/s … (455k image) which IMO is pretty reasonable :) > > Esteban > > > On 19 Jan 2016, at 12:34, Sven Van Caekenberghe <s...@stfx.eu> wrote: > > > > > >> On 19 Jan 2016, at 12:29, PBKResearch <pe...@pbkresearch.co.uk> wrote: > >> > >> Denis > >> > >> Very interesting. It would be more interesting if you could save your > test image as a .png file, and then include reading with PNGReadWriter in > your comparison. This would help to confirm or refute the original point > made by Dimitris, that reading from .png is particularly slow. > > > > Check the original thread/case, it is slow. Not *very* slow, but slower > than the plugin based JPEG reader. That is what we eventually need, a > plugin base PNG reader. > > > >> Peter Kenny > >> > >> From: Pharo-users [mailto:pharo-users-boun...@lists.pharo.org] On > Behalf Of Denis Kudriashov > >> Sent: 19 January 2016 10:59 > >> To: Any question about pharo is welcome <pharo-users@lists.pharo.org> > >> Subject: Re: [Pharo-users] Creation form from PNG file very slow on > Pharo 4 and 5 > >> > >> > >> 2016-01-19 11:34 GMT+01:00 Dimitris Chloupis <kilon.al...@gmail.com>: > >>> most likely fuel, since it stores your live object as is. > >>> > >>> I like fuel but the fact that I may be limited by incompatible > versions is a game stopper for me. I am ok with new version between > incompatible with old one but there must be some backward compatibility to > any format I use. Or else I end up worrying about things I should not be > worrying about. > >> > >> You are right. I perform little experiment. Fuel reading is 60% faster > than BMP: > >> > >> Smalltalk garbageCollect; garbageCollect. > >> r1 := [FileLocator imageDirectory / 'test.bmp' readStreamDo: [ :s | > >> s binary. > >> fromBMP := BMPReadWriter formFromStream: s]] benchFor: 2 seconds. > >> > >> Smalltalk garbageCollect; garbageCollect. > >> r2:=[FileLocator imageDirectory / 'test.fuel' readStreamDo: [ :s | > >> s binary. > >> fromFuel := (FLMaterializer newDefault materializeFrom: s) root]] > benchFor: 2 seconds. > >> > >> { r1. r2 } "an Array(a BenchmarkResult(2,199 iterations in 2 seconds 2 > milliseconds. 1,098 per second) a BenchmarkResult(5,728 iterations in 2 > seconds 3 milliseconds. 2,860 per second))" > > > > > > >
