> 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))"
