Whats The Benefit of idea64.exe?

I only just noticed that on my 64bit Windows 7 PC, IDEA is running as 32 bit.
This is probably due to the installer putting a shortcut to the 32 bit exe instead of the 64 bit exe.
Due to the nature of 64 bit applications (I think), idea64.exe requires more memory (or at least the vmoptions have more by default).

Am I going to see any difference if I switch?

Has anyone done any benchmarks to compare idea64.exe to idea.exe?

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afaik the only difference is that you can do really large inspection runs without idea getting an OOME

(why should there be a performance difference? and how do you even measure that?)

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