Re: [9fans] image/memimage speed

[Paul Lalonde <plalonde@telus.net>]

Minor gripe as a graphics person - I loathe frames per second as a
performance measure.  Because of the inverse you can't really compare
the numbers.  Consider the difference in improvement between 1fps and
2fps compared to 29fps and 30fps.  Both improve by 1fps, but they
represent dramatically different performance gains.

If you can at all, report milliseconds per frame, ideally with fixed
system overhead removed.

The only time fps is appropriate is if you're targetting your v-blank
rate.

Yes, I've been reviewing too many papers with bar charts of gps
measures lately...

Paul

On Nov 30, 2008, at 6:35 PM, erik quanstrom <quanstro@quanstro.net>
wrote:

>
>> can you report timings on the xscreensaver hacks (link at bottom)?
>
> sure.  a few of the programs didn't seem to work (delayscreen
> and polydominoes).  mountain, sphere and spirograph seemed
> to hum right along.
>
> - erik
>
> ; cat '#P/archctl'
> cpu AMD64 2604 pge
> pge on
> coherence mfence
> cmpswap cmpswap486
> i8253set on
>
> ; cat /dev/wsys/^`{cat /dev/winid}^/wctl
>         60         505         765        1034 current visible
>
> 8.anemone: fps: 30.796417
> 8.anemotaxis: fps: 25.595581
> 8.attraction: fps: 55.993117
> 8.blaster: fps: 71.190817
> 8.boxfit: fps: 20.596372
> 8.ccurve: fps: 0.999865
> 8.cloudlife: fps: 22.795733
> 8.coral: fps: 70.787094
> 8.critical: fps: 151.975499
> 8.decayscreen: fps: 0.000000
> 8.deco: fps: 0.199968
> 8.deluxe: fps: 14.197528
> 8.demon: fps: 379.542993
> 8.discrete: fps: 17.997126
> 8.drift: fps: 8.998634
> 8.eruption: fps: 25.996981
> 8.euler2d: fps: 43.295463
> 8.fadeplot: fps: 51.393631
> 8.flame: fps: 7.598581
> 8.flow: fps: 45.593024
> 8.fluidballs: fps: 13.798253
> 8.forest: fps: 8.598666
> 8.fuzzyflakes: fps: 41.790739
> 8.galaxy: fps: 160.172456
> 8.glenda: fps: 46.295627
> 8.halftone: fps: 18.597379
> 8.helix: fps: 0.399954
> 8.hopalong: fps: 414.148296
> 8.hypercube: fps: 34.194590
> 8.hyperglenda: fps: 30.996313
> 8.ifs: fps: 37.993663
> 8.imsmap: fps: 0.199964
> 8.interaggregate: fps: 9.198770
> 8.interference: fps: 5.599390
> 8.julia: fps: 45.392443
> 8.lyap: fps: 45674.831450
> 8.maze: fps: 1.199848
> 8.moire: fps: 0.999855
> 8.mountain: fps: 31790.873361
> 8.munch: fps: 0.199971
> 8.nerverot: fps: 26.795984
> 8.pacman: fps: 59.190800
> 8.pedal: fps: 0.599921
> 8.petri: fps: 76.190348
> 8.pyro: fps: 305.364824
> 8.rd-bomb: fps: 32.995072
> 8.ripples: fps: 27.196419
> 8.rorschach: fps: 0.000000
> 8.rotzoomer: fps: 34.194205
> 8.scrdump: fps: 0.000000
> 8.sierpinski: fps: 46.592159
> 8.slip: fps: 1.799762
> 8.sphere: fps: 647.526941
> 8.spirograph: fps: 23604.015568
> 8.squiral: fps: 2129.662538
> 8.starfish: fps: 49.190284
> 8.strange: fps: 47.992470
> 8.substrate: fps: 0.000000
> 8.swirl: fps: 551.526029
> 8.thornbird: fps: 28.196393
> 8.triangle: fps: 66.588276
> 8.vermiculate: fps: 1357.648605
> 8.vines: fps: 87.190306
> 8.wander: fps: 51699.256387
> 8.whirlwindwarp: fps: 55.592024
> 8.wormhole: fps: 32.196066
> 8.zoom: fps: 2.399737
>
>