VC Loop Speed! - VERGE, Free 2d Game Engine

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VC Loop Speed!

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Omni	Okay, I've always thought there was some kind of overhead for VC loops. Which makes stuff like: While loop while not done draw pixel So slow. But...what if there was no loop? Recursion void MyFunc() { if done return draw pixel MyFunc } Would Recusion be MUCH faster? As in fast enough to make too impractical VC loops to be worthwhile? Posted on 2004-06-30 14:54:03
Zip	I'm almost certain that function calls are one of the slowest things in verge. Loops, asingments and conditionals are all reasonably quick. I'd say the slow thing in that code is the SetPixel() - which you can't get round really. Zip Posted on 2004-06-30 15:19:19
Omni	Function calls are one of the slowest things in verge... Whoa, what? Seriously? Posted on 2004-06-30 15:56:41
Zip	Hmm... I was slightly misleading there. CallFunction("") is slow, a blank function call void Func(void) is actually quite fast, it's passing and returning that's slower - and then only significantly in relation to the same thing done in code. Thats how my alternative abs() is faster. So I tried to give you code a go, but verge didn't like it - compiles but kicks out with no crash and no error message. Here's the code, just in case I'm being a moron: void Recur() { if (x > 1024 * 1024) return; x++; Recur(); } With x as a global and a call to Recur(); between my timing stuff. Zip Posted on 2004-06-30 17:15:25 (last edited on 2004-06-30 17:15:26)
Zip	McGrue, did my post just auto edit itself to fix the fact I had a > rather than >? In case it works again, that a plain greater than sign, than a & gt; Zip Posted on 2004-06-30 17:17:38
Omni	X was a global variable, right? It is also possible that VC has a limit to how deep the threaded functions can go. Posted on 2004-06-30 18:01:44
vecna	Uh.. yeah. Eventualy you'll run out of stack space. 1million nested function calls is definitely bigger than the VC stack allocation. ^_^ Posted on 2004-06-30 22:21:13
Omni	Hmm. Thought I had a good idea that time. Darn. Posted on 2004-07-01 01:27:48

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