Comments on: Re-use your BitmapData objects, speed up your apps

By: Mickbig

Mickbig — Thu, 12 Aug 2010 11:45:16 +0000

The example uses “trace” to output the results so I assume you use the debugger.
Have you tested it in a release build ?

By: ColePark

ColePark — Sun, 23 May 2010 16:22:03 +0000

Wow… amazing post. This has given me some really cool ideas of how to use BMDs and bitmaps haha

By: Visual Harmonics » Post Topic » Speeds of different BitmapData drawing methods

Wed, 11 Nov 2009 10:47:27 +0000

[...] a reference to Daniel Hai’s article on this from some time ago: 10000 operations of “BitmapData.draw()” 4068 ms 10000 operations of [...]

By: Valentin

Valentin — Mon, 19 Oct 2009 15:34:11 +0000

I got different results with flash player 10 and flex compiler.

“BitmapData.draw()” 2896 ms
“BitmapData.clone()” 2306 ms
“new BitmapData()” : 2031 ms
“BitmapData.fillRect()” : 664 ms
“BitmapData.copyPixels()” 499 ms

By: Dennis

Dennis — Fri, 13 Mar 2009 14:10:36 +0000

I think that your timing of copyPixels() might be slightly biased because you’re creating a new Point object at every iteration.

The timing might get much faster by creating a single Point object before iterating.

By: Hunter Loftis

Hunter Loftis — Thu, 11 Dec 2008 12:34:00 +0000

Is copyPixels or fillRect the least expensive? The paragraphs conflict with each other. Nice analysis though, this is good stuff to know (and I wish more performance info was available from the API itself)

By: AS3 Optimizations « Jjroox’s about user experience

AS3 Optimizations « Jjroox’s about user experience — Sat, 22 Mar 2008 15:52:14 +0000

[...] Daniel Hai » Re-use your BitmapData objects, speed up your apps: [...]

By: Rezmason

Rezmason — Mon, 02 Apr 2007 17:59:37 +0000

Huh! I think I can put these to good use.

Is there any chance that these faster methods are quicker because they rely less on creating new objects? For instance, clone() returns a reference to a new object that is a duplicate of an old one, whereas copyPixels() doesn’t rely on dynamically creating anything.

By: danielyuen.hk Blog : links for 2006-12-12

danielyuen.hk Blog : links for 2006-12-12 — Tue, 12 Dec 2006 15:29:16 +0000

[...] Daniel Hai » Re-use your BitmapData objects, speed up your apps (tags: BitmapData) [...]

By: Tek

Tek — Tue, 12 Dec 2006 12:25:55 +0000

Really interesting, bookmarked !