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WebGL VS. Canvas 3D

Andor Salga | 7 November, 2009 | 20:33
I had the feeling after I did most of the porting from Canvas 3D to WebGL the performance dropped. To investigate, I ran our benchmark on two systems. The benchmark is simply a script which renders textured teapots in the canvas tag. On each machine I ran the benchmark using Firefox 3.5 with the Canvas 3D extension and then on Firefox 3.7a1pre which uses WebGL. Here are the results:

CDOT Desktop (New Zealand)
Windows XP Pro
Intel Core 2 Quad CPU @ 2.4GHz
3.24GB RAM
GeForce 8600 GT 512MB
TeapotsCanvas 3D FPS WebGL FPS
staticrotatingstaticrotating
1 64646464
964636463
4930233226
10016131815


Macbook Pro
OS X (10.5.8)
2.2GHz Intel Core 2 Duo
2GB DDR2 RAM
GeForce 8600M GT 128MB
TeapotsCanvas 3D FPS WebGL FPS
staticrotatingstaticrotating
1 55554339
91615119
494322
1002211

The performance on the desktop is improved when using WebGL, but is reduced on the laptop. This could be happening for a variety of reasons, which I’ll need to carefully think over. But one important question which keeps bothering me is “Is this a fair test?”. One frame a second is terrible performance, but when you’re rendering 100 3D objects in a browser, it’s a bit unfair to just state that it’s too slow. I’d love to improve the performance so 100 teapots renders at 30FPS, but realistically that’s probably not going to happen. So, the question is by what factor can we speed up rendering? Frankly, I’m not entirely sure, but I’ll be taking a look at other WebGL demos and comparing to see what kind of performance they are able to provide. If anyone has ideas or suggestions, I’d love to hear them!

As a final note, I think to generate more accurate results, the benchmark needs to be modified or otherwise another more thorough benchmark needs to be created. One which runs at least a series of 100 tests. Each test could include an additional teapot to render. If this is done, graphing the results would much more meaningful. If anyone, especially OSD600 or DPS909 students is interested in doing this, let us know!
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2 responses

[...] from the original Canvas3D (WebGL’s predecessor). The latest news

WebGL around the net, 9 Nov 2009 - Learning WebGL | 9 November, 2009 | 11:34

[...] from the original Canvas3D (WebGL’s predecessor). The latest news is that they have some speed comparisons (in terms of teapots per second ;-) between the [...]

Hey... I noticed that my Macbook Pro has the same configuration

Arun Suresh | 3 December, 2009 | 23:13

Hey…

I noticed that my Macbook Pro has the same configuration as your:
OS X (10.5.8)
2.2GHz Intel Core 2 Duo
2GB DDR2 RAM
GeForce 8600M GT 128MB

yet I am not able to get Minefield (v3.7a1) or WebKit (r51580)
to render anything for eg : http://www.peternitsch.net/demo/webgl/index.html

For Minefield.. i have flipped the “webgl.enabled_for_all_sites” and the “html5.enable” switch in about:config..
And for webkit, I have set the following switch.. “defaults write com.apple.Safari WebKitWebGLEnabled -bool YES”

For some reason.. nothing seems to work…
Could you please let me know if I am missing something ?

Thanks in advance
-Arun

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