MACROMEDIA FLEX 2-TESTING FLEX APPLICATIONS WITH MERCURY QUICKTEST PROFESSIONAL Manuel d'utilisateur télécharger pdf (Page 16)

495 CHAPTER 23 Debugging and testing

■

Object count/object allocation —How many objects have been instantiated? What if

you have many instances of the same object? For example, if you can use fewer

instances, you’ll save on overhead.

■

Object size—How big are these objects? For objects that have many instances, is

their combined size a concern?

■

Garbage collection—By default, Flex takes care of destroying objects when they’re

no longer needed. Garbage collection is the process of recovering the memory

that they once held. It’s possible that objects may linger for a while before this

process occurs (which causes memory leaks), so you may want to add logic in

these cases to explicitly destroy them.

Using the Profiler is similar to using the Debugger: you launch the tool from Flex

Builder.

LAUNCHING THE PROFILER

You’ll find the Profile button on the toolbar in Flex Builder, beside the Debug icon.

If you click it, the window shown in

figure 23.5 opens, where you can select

what you want to watch.

The settings in the dialog box are:

■

Connected From—The server you’re

connected to (or localhost, if it’s the

same computer).

■

Application—Path to the Flex applica-

tion’s

SWF file.

■

Enable Memory Profiling—Enables the

tracking of memory usage.

■

Watch Live Memory Data—Memory

tracking will occur if Enable Memory

Profiling is selected. Watch Live

Memory Data indicates whether you

want to watch it in the Live Objects view.

■

Generate Object Allocation Stack Traces—Lets you track how objects are created.

■

Enable Performance Profiling—Lets you watch where processing time is spent.

You could use all of these options all the time; the only difference is how much profil-

ing data is generated and the performance impact while profiling is running.

Launch the Profiler to see it in action, as shown in figure 23.6.

The Profiler functions similarly to the Debugger. After you’ve launched it, switch

back to Flex Builder to control the application’s execution.

Figure 23.5 Launching the Profiler prompts

you with configuration options.

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 26 27

Commentaires sur ces manuels

Pas de commentaire

MACROMEDIA FLEX 2-TESTING FLEX APPLICATIONS WITH MERCURY QUICKTEST PROFESSIONAL Manuel d'utilisateur Page 16

Commentaires sur ces manuels

Produits connexes et manuels pour Manuels des logiciels MACROMEDIA FLEX 2-TESTING FLEX APPLICATIONS WITH MERCURY QUICKTEST PROFESSIONAL