On Thu, Apr 5, 2018, 16:09 Henrik Sperre Johansen < henrik.s.johan...@veloxit.no> wrote:
> HilaireFernandes wrote > > After some more investigation, I think it is not the greated bottleneck. > > > > When I render points not as discs but as Square, Athens is happy. I > > guess the Cairo way of doing this is very slow because its seems Cairo > > does not come with dedicated disc rendering code, it must be render with > > portion of arc, as far as I remember. > > > > If I prevent to render empty text label attached with each point, Athens > > is even happier. Text font rendering through Athens seems to be slow. > > > > Hilaire > > > > > > Le 04/04/2018 à 23:05, Hilaire a écrit : > >> It reduces by 50% the time to execution. Need to check if this trick > >> #1 and #2 are still needed at P7 time. > > > > -- > > Dr. Geo > > http://drgeo.eu > > My notes after looking at the profile for a short while, if anyone feels > the > urge to optimize; > UFFI: > > > 8.8% {11475ms} > > > CairoFreetypeFontRenderer>>convertString:len:ofFont:toGlyphs:numGlyphs:x:y: > > | 4.7% {6098ms} ExternalAddress>>packToArity: > > | 4.5% {5789ms} ExternalAddress>>pointerAutoRelease > > | 2.6% {3439ms} ExternalAddress>>unpackFromArity: > > The lifespan of arguments that need arity packing/unpacking is well known, > rewriting to use explicit free should lessen the overhead somewhat. > > CAIRO: > > > 26.6% {34593ms} CairoFreetypeFontRenderer>>glyphsOf:from:to: > > | 12.2% {15842ms} CairoGlyphsArray class>>new: > > With this kind of overhead just to create the array to hold results, it > might be worthwhile to use a buffer array (of sufficient size) for the > primitive, and copyFrom:to: to return the actual glyphs... > > DRGEO: > > > 20.9% {27116ms} DrGPointMorph>>drawOnAthensCanvas: > > |16.7% {21720ms} AthensCairoCanvas(AthensCanvas)>>createPath: > > Storing the path in DrGPointMorph, rather than recreating for each draw:, > should save alot of time. > > > > 7.7% {9962ms} DrGTextMorph>>drawOnAthensCanvas: > > | 7.7% {9962ms} Form>>asAthensPaintOn: > > Same thing here, only storing the paint, rather than converting from form > each draw. > This would also be beneficial to Roassal when zooming in and out of vusualization with a ton of labels. Phil > > Cheers, > Henry > > > > -- > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html > > >
