Comment 5 for bug 187106

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John A Meinel (jameinel) wrote : Re: bzr from standalone installer has poor performance on Vista

There is some very interesting actions going on. Specifically if you look at:
618.0 618.0 ++++ atexit @ logging:1363
614.0 614.0 ++++ threading @ logging:38
609.0 609.0 ++++ string @ logging:29
603.0 603.0 ++++ traceback @ logging:29

It seems like *each* import XXX from the standard library is costing ~600ms. If you look through the output you see ~600 show up a lot of times.

I wonder if each access is causing the virus software to scan the whole .zip file, which is takes approx 600ms. Or maybe just some sort of strange context switch delay?