R: Cygwin 1.7.7 fork/exec performance MUCH slower than 1.5.25

[Christopher Faylor]

On Thu, Sep 30, 2010 at 09:10:48AM -0400, Edward Lam wrote:
>> testing on /tmp/benchmark with XPS P2
>>
>> cygwin 1.7.8s 20100924
>
>You're testing on the latest snapshot against his cygwin 1.7.7 results. 
>This gives me hope that Cygwin can become faster because Sagi Ben-Akiva 
>was willing to track down the cause of the slowdown [1]. Last I read, 
>it's not clear whether the latest CVS changes are faster though [2]. 
>However, it's probably worth trying out the 20100926 snapshot.
>
>We haven't mentioned yet whether we are running under 32-bit or 64-bit 
>Windows. It would be useful to know whether the problem only affects 
>64-bit Windows or not. Looking at the code changes, I would have thought 
>it would equally affect 32-bit Windows.

32-bit Windows is basically unchanged.

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