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All of the physical RAM in the world doesn't mean a damned thing if you're a Win32 process limited to 2 GiB of user address space. Heap fragmentation is a very real problem there.

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So don't run win32. :) We've had 64-bit processors for a while now, run a 64-bit OS and you have all the address space you might want.

And even on 64-bit Windows, 32-bit Firefox will get the full 4 GB of address space.

LOL. Yesterday, I restarted firefox because it ate 13GB of virtual memory and started to get really unusable.

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