Flash Player attempts to meet the frame rate you set; the actual frame rate during playback can vary on different computers. If a document that is downloading reaches a particular frame before the frame’s required data is downloaded, the document pauses until the data arrives.
To view downloading performance graphically, use the Bandwidth Profiler, which shows how much data is sent for each frame according to the modem speed you specify.
note: (Flash Professional CC only) Bandwidth Profiler is unavailable with Flash Professional CC. You can choose to use Adobe Scout with Flash Professional, instead. See Using Adobe Scout with Flash Professional for more information.
In simulating the downloading speed, Flash Professional uses estimates of typical Internet performance, not the exact modem speed. For example, if you select to simulate a modem speed of 28.8 Kbps, Flash Professional sets the actual rate to 2.3 Kbps to reflect typical Internet performance. The profiler also compensates for the added compression support for SWF files, which reduces the file size and improves streaming performance.
When external SWF files, GIF and XML files, and variables are streamed into a player by using ActionScript calls such as loadMovie and getUrl, the data flows at the rate set for streaming. The stream rate for the main SWF file is reduced based on the reduction of bandwidth that the additional data requests cause. Test your document at each speed and on each computer that you plan to support to ensure that the document doesn’t overburden the slowest connection and computer for which it is designed.
You can also generate a report of frames that are slowing playback and then optimize or eliminate some of the content in those frames.
To change the settings for the SWF file created using the Test Movie and Test Scene commands, use File > Publish Settings.