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))"
>
>
