What are the pros and cons of running IIS as 32bit vs 64bit on a 64bit OS?

Question

Possibly better suited for \"Rack Overflow\", but from a developer\'s point of view, what are the advantages and disadvantages of running IIS (serving both legacy classic AS

Answer 1

Besides the obvious memory differences, 32 bit processes on a 64 bit OS have to run in something called "Windows on Windows" or WOW mode. It's basically a thunking/emulation layer. There is a performance penalty if you pay close enough attention.