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Old 04-02-06, 07:38 AM   #53
Ewald
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Join Date: Mar 2006
Posts: 6
Default Re: Slow AA text rendering in KDE

On this AMD X2 3800 with nVidia 6600 card (400 MHz GPU clock), running
Mandriva 2006 I get

No AA:
Painting 10000 strings took: 126 ms

AA without subpixel:
Painting 10000 strings took: 8481 ms
This is strange as other people say it should be fast.

AA with RGB subpixel:
Painting 10000 strings took: 8402 ms

AA with grayscale subpixel:
Painting 10000 strings took: 6041 ms

So antialiasing makes things go ~60x slower.

btw I modified the time reading code a bit:
float udiff = tv2.tv_usec - tv1.tv_usec + 1e6*( tv2.tv_sec - tv1.tv_sec );
printf("Painting %d strings took: %.0f ms\n", i, 1e-3*udiff );
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