Click here to read about this example in my blog

Measuring performance while adding markers in Google Maps

Select how many markers and which technique you want to use.

Statistics

Note: The time displayed in the result is when the markers have been added to the map and the addoverlay() method has triggered.

I haven't yet found a way to measure the time when the markers are actually visible on the map. If you have an idea on how to do this please tell me by mailing me at gabriel [at] svennerberg [dot] com. Thanks!