User's Guide


Quickly determining how long it takes code to run

Before you analyze in depth the runtime performance of your code, have the method millisecondsToRun: display how long it takes to run the code. To do this, add millisecondsToRun: to a method shown in a browser and have the system print the elapsed time to the Transcript. The expressions you add to the method are as follows:

Transcript show: (
  Time millisecondsToRun: [
    <code>.
  ]) printString; cr.

When you run the code, the time it takes to run the code prints to the Transcript.

Or, if you can run the code from a Transcript, Workspace, or description pane:

  1. Add the following to your code: Time millisecondsToRun: [ <code> ]
  2. Using your mouse, mark the text.
  3. From the Edit menu, select Display. The number of milliseconds it takes to run the code is displayed.


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