1) Faster FFTs for most SSE2-capable CPU architectures.
2) More FFT lengths supported.
3) Some of the new, faster FFTs don't let us do as much error checking on each iteration.
If you don't want to lose this error checking, choose "SUM(INPUTS) error checking" from
the Options menu. This will slow down your tests by about 2-5%.
4) When a possible hardware error occurs during a test, the error message would
likely scroll off the screen unnoticed. Now, all future progress updates to
the screen will be followed by a message containing a count of the errors that
have occurred during the test.
5) Worker Windows now stagger their starts. This improves timings for some
CPUs and operating systems. See undoc.txt to control this feature.
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