[Issue 16200] Faster pow implementation for integral exponents

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=16200

--- Comment #3 from Berni44 <bugzilla at bernis-buecher.de> ---
Created attachment 1815
  --> https://issues.dlang.org/attachment.cgi?id=1815&action=edit
Some analysis on speed differences between the three algorithms in charge

I added now an attachment with a speed analysis of the three algorithms
(stepanovs is not identical to the one given above). Main result: None of the
three algorithms is clearly better than the others. (But there are nice
diagrams and an other idea on how to improve the speed of the pow function.)

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