Blitzmax slows down on random computer
BlitzMax Forums/BlitzMax Beginners Area/Blitzmax slows down on random computer
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| So my program experience slowdown on random computer, according to people who test the game it also happen in powerful pc too ... it happens rarely though, sometimes it's fixed with a simple restart, sometimes it's fixed with me sending a new game build(even though i didn't change any of the fundamental graphics related code) any ideas? the first part is simply loading icon, followed by prompt to choose resolution & graphic driver, after that is the game loop strict Import "icon_import.o" ' ----------------------------------------------------------------------------- ' SetIcon ' ----------------------------------------------------------------------------- 'Needed externs ?win32 Extern "win32" Function ExtractIconA%(hWnd%,File$z,Index%) Function GetActiveWindow%() Function SendMessage:Int(hWnd:Int,MSG:Int,wParam:Int,lParam:Int) = "SendMessageA@16" End Extern ? ' ----------------------------------------------------------------------------- ' SetIcon ' ----------------------------------------------------------------------------- Global ScreenWidth: Float Global ScreenHeight: Float Local bFullScreen: Int Local iDriver: Int AppTitle$="Choose Screen Mode" Graphics 320,240,0 SetIcon(AppFile, GetActiveWindow()) DrawResolutionChoices() If KeyDown(KEY_1) Then ScreenWidth = 1024 ScreenHeight = 768 bFullScreen = False Else If KeyDown(KEY_2) Then ScreenWidth = 1280 ScreenHeight = 768 bFullScreen = False Else If KeyDown(KEY_3) Then ScreenWidth = 1280 ScreenHeight = 720 bFullScreen = False Else If KeyDown(KEY_4) Then ScreenWidth = 1366 ScreenHeight = 768 bFullScreen = False Else If KeyDown(KEY_5) Then ScreenWidth = 1024 ScreenHeight = 768 bFullScreen = True Else If KeyDown(KEY_6) Then ScreenWidth = 1280 ScreenHeight = 768 bFullScreen = True Else If KeyDown(KEY_7) Then ScreenWidth = 1280 ScreenHeight = 720 bFullScreen = True Else If KeyDown(KEY_8) Then ScreenWidth = 1366 ScreenHeight = 768 bFullScreen = True End If Cls() FlushKeys() DrawDriverChoices() If KeyDown(KEY_1) Then iDriver = 1 Else If KeyDown(KEY_2) Then iDriver = 2 End If SeedRnd MilliSecs() 'Joystick Components JoyCount() Local ElapsedTicks:Float = -1 'Timer Components Local time:TTimer = CreateTimer(60) If ( iDriver = 1 ) Then SetGraphicsDriver D3D9Max2DDriver() If ( GetGraphicsDriver() = Null ) Then SetGraphicsDriver D3D7Max2DDriver() Graphics( ScreenWidth, ScreenHeight, bFullScreen ) Else SetGraphicsDriver GLMax2DDriver() GLGraphics( ScreenWidth, ScreenHeight, bFullScreen ) End If SetIcon(AppFile, GetActiveWindow()) SetBlend( AlphaBlend ) 'Main Loop Init() Repeat WaitTimer(time) Cls Move() Draw() Flip 'Until KeyDown(KEY_ESCAPE) Or AppTerminate() Or ( Manager.WindowTitle.iExecuteCode = MAIN_EXIT ) Until AppTerminate() Or ( Manager.WindowTitle.iExecuteCode = MAIN_EXIT ) BGMPlayer.Stop() EndGraphics() |
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| Do you happen to have any memory leaks? (If you pull up task manager while the game is running, does it have an excessive amount of RAM claimed? running low on or even out of memory, can dramatically slow down a PC's speed when it starts hammering the virtual memory) |
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| @xlsior mmm .. maybe that's the problem ... how to fix memory leaks? I'm using "list" and create the enemy with "new", after they're not used anymore in the game I remove them with "removelist". They're removed from the list but it seems that they're still in the memory .. will appreciate any help! edit 1: just want to add that people who has slowdown problem experience the slowdown right from the start, so it's not gradually edit 2: the program starts with around 290k used & the leak is only 5-10k everytime it starts a new stage, there is less than 10 stages in the game, is it still possible to cause a slowdown with today's technology ? |
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| They're removed from the list but it seems that they're still in the memory . Blitzmax will not return the memory back to the OS, but it will be re-used for other operations if you need it later in the program. edit 2: the program starts with around 290k used & the leak is only 5-10k everytime it starts a new stage, there is less than 10 stages in the game, is it still possible to cause a slowdown with today's technology ? Those amounts are trivial, so shouldn't be an issue at all. Actually, just realized something else: I noticed that you're using joysticks -- don't have one myself so never dealt with it, but supposedly joycount() can lead to a huge slowdown in some cases, especially if you have a joystick that gets disconnected: For some more info, see: http://www.blitzbasic.com/Community/posts.php?topic=82245 |
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| ooh! interesting! This indeed seems like a possible cause. I'll give it a try, thanks, xlsior! |
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| It is possible that something in the background is slowing down the system longer than 1/60th of a second. That would cause your game to slow down. By running the logic separately from the rendering, you could keep items moving the same rate even when the framerate drops. Two common ways to do this would be 1: multiply all movement by number of logic frames, or 2: run the logic more than once before rendering to screen.
Local Frames:Int = WaitTimer(Timer)
For Local i:Int = 1 to Frames
Move()
Next
Cls
Draw()
Flip
or
Local Frames:Int = WaitTimer(Timer)
Move(Frames)
Cls
Draw()
Flip
...
Function Move(Frames:Int)
PlayerX :+ XUnitsPerFrame * Frames
PlayerY :+ YUnitsPerFrame * Frames
End Function
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| I see, thanks TomToad. That's an interesting coding technique! I'll try it if the gamepad fix fails :D. |
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