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DarkBASIC Professional Discussion / Program stutters initially?

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Lampton Worm
23
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Joined: 4th Sep 2002
Location: United Kingdom
Posted: 27th Oct 2003 19:44
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Hi, when I run my current project, for the first few seconds it is fine (e.g. 60fps), then the FPS drops by 10/15, and then returns to 60 and stays about right. Just wondered if anyone else had this at all? The code doesn't have any event that starts a few seconds in that may cause this judder. Just wondered! I guess its possible ZoneAlarm checks the EXE and that causes a blip, can't think of any other 3rd party software that may do that (I turned off Norton but that didn't make any odds). I'll keep debugging.

Thanks.
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MikeJohnson
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Location: Radcliffe, Manchester
Posted: 27th Oct 2003 21:19
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Could well be other software interfering. Does this happen even with simple programs that just loop around and do nothing else?

Mike
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CattleRustler
Retired Moderator
22
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Joined: 8th Aug 2003
Location: case modding at overclock.net
Posted: 27th Oct 2003 21:37
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I actually just noticed this exact thing happening here to. It's very strange because I have more "involved" programs that don't do this, but I just wrote a remake of pong and I noticed it happening

wierd

-RUST-
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Shadow Lord
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Joined: 26th Sep 2003
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Posted: 27th Oct 2003 22:31
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I have noticed this too. I also get a little hard drive thrashing during this slow down, so I assumed the drive was cleaning up after itself, temp files etc, and that was causing the slow down. I have an old slow computer so it doesn't take much for it to fall on it's face. But after 3-8 seconds, FPS come right back to where they started.

I'm using DBPro to write "Suger Free Candyland", for diabetic children!
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zman
22
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Joined: 18th Oct 2003
Location: Madison, WI USA
Posted: 28th Oct 2003 01:58
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I noticed this too...for me it only seems to happen when I use exclusive mode.

Interestingly enough, I get the exact same behaviour from a non-DB Pro app that I wrote in C++ which also uses exclusive mode...so maybe it's a DirectX thing?
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Lampton Worm
23
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Joined: 4th Sep 2002
Location: United Kingdom
Posted: 28th Oct 2003 17:52
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Hi Mike, I'll test with a very simple program, but it seems I'm not alone. Which is a good and a bad thing I'll also test by adding a delay at the very start of the code, that'll help figure if its something post or pre model loading etc. see if that makes any odds.

Thanks.
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Lampton Worm
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Location: United Kingdom
Posted: 29th Oct 2003 12:28
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Hi, I tried a tiny program (just a spinning cube) and the frame rate (using screen fps() as a guage and locked at 60) went from 0 to 55 and then settled at 66 in the first 3 seconds. I ran the same test in my larger project and the beginning was the same, then after a few seconds there are 2 spikes where it drops to 44 twice (a few seconds inbetween) then settles at 60. If I get the time I'll drop an fps graph function out so people can see their fps history when running their programs.

Cheers.
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OSX Using Happy Dude
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Joined: 21st Aug 2003
Location: At home
Posted: 29th Oct 2003 12:33
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I would think its the swap file having stuff added to it - do you notice any HD activity ?


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