Flash Movie Running Slow

Hi there,

I recently have made a website in Flash and it runs fine in the Flash Player, however, when its in a browser it runs pretty slow? Presumably this is because it is too demanding for the processor or perhaps the Flash Player has more dedicated memory. Is there a way to make it run faster? I tried putting the Publish JPEG qulaity to its lowest but that didnt make a difference.

Thanks, Jack.
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muxxterConnect With a Mentor Commented:
Well, I don't know the reason why it would run slower in a browser. Whether it's because the flash instructions are being interpreted, or because the browser has to share it's memory with the player, or what. But there are couple of things you can do to help speed things up.

Zeffer made a good suggestion, to convert as much as you can to symbols. Instead of Tweening everything individually, animate as much as you can as smaller groups.

Also, you can animate stuff using Actionscript instead of the timeline. You can do this by using the undocumented Tween class. I'm confident that this is a much more processor friendly way of doing stuff. Here's how it works:

new Tween(<movieClipInst>, <property>, <easeType>, <startValue>, <endValue>, <duration>, <useSeconds>);

movieClipInst ... a reference to the MovieClip instance you want animate
property ... the property of the above reference you want to change with the animation (eg. _alpha, _rotation, _x, _width, etc.)
easeType ... a reference to an ease class (it'll be explained more in the example below)
startValue ... at the beginning of the tween, the above property will be set to this number
endValue ... during the animation, the above property will be "smoothly" changed (according to the easeType), and finish at this number
duration ... how long you want the animation to last (either in seconds or frames, see below)
useSeconds ... a boolean. True: duration is in seconds, False: duration is in frames

To use it, you need to import the mx.transitions library.
Here's an example:

import mx.transitions.*;

var easeType = mx.transitions.easing.Strong.easeOut;

var my_tween = new Tween(my_obj, "_x", easeType, 0, 200, 3, true);
my_tween.onMotionFinished = function() {
    trace("Animation finished.");

For more information on this, or for a nice demonstration of what each ease type does, check out actionscript.org:


I hope this helps.
Do you mean that it loads slowly? Or, are the animations/etc. running slowly/choppy?

if you have lots of jpegs .. select each one and go.. modify/break apart.. and then turn them into a graphic symbols
you especially need to do this if you are using transitions or tweening.. so there is one copy in the library and the rest are all instances.
you should also turn text and graphics that transition or tween into symbols also..

the player will thank you.:)

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Portal111Author Commented:
Hey its the animation thats running slowly. Ive only got a couple of jpegs, I had a go at breaking them apart but unfortunately it didnt make any difference.

Hi Jack..I'll have to leave this to the Muxxter..he'll sort it..
gonna be away for a few days.

Portal111Author Commented:
hey, thanks for the help everyone, I tried AS insteading of normal tweening and it did make a difference,

Thanks again, jack.
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