[Newbies] How to profile a bunch of code

David Shaffer cdshaffer at acm.org
Mon May 8 13:10:25 UTC 2006

cdrick wrote:

> Hi
> Is it possible to compare methods time execution...
> I know the possiblity to use
> Time millisecondsToRun: aBlock
> but it's not really useful...
> I've seen a profiler but not really sure...
> My aim is just to compare for instance the access to an existing
> dictionary, or creating it with several methods...
I use the "TimeProfileBrowser":

  TimeProfileBrowser spyOn: ["your code goes here"]

The code in the block should take at least 1 second to get a reasonable
number of samples.  If you need to you can always do something like:

  TimeProfileBrowser spyOn: [100 timesRepeat: ["your code goes here"]]

Keep in mind that spyOn: does its work by sampling the stack at fixed
intervals...have a look at the class docs for MessageTally for more
details and alternatives.


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