The Jargon File (version 4.4.7, 29 Dec 2003):

pound on
 vt.

    Syn. bang on.


The Free On-line Dictionary of Computing (30 December 2018):

bang on
pound on

   (Or "pound on").  To stress-test a piece of hardware or
   software: "I banged on the new version of the simulator all
   day yesterday and it didn't crash once.  I guess it is ready
   for release."

   [Jargon File]