Hi,

BASIC Stamp timing:
http://www.emesystems.com/BS2speed.htm

PicBasic Pro timing:
You can run your PBP program in the MPLAB simulator and use the StopWatch function to get the timing of the commands.
(Menu Debugger\Stopwatch).

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From the PicBasic Pro manual:

Without the overhead of reading instructions from the serial EEPROM, many PBP instructions (such as GOTO and GOSUB) execute hundreds of times faster than their BASIC Stamp equivalents.

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Luciano