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.
Cheers,
Henry
--
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