in reply to Re^2: Our perl/xs/c app is 30% slower with 64bit 5.24.0, than with 32bit 5.8.9. Why?
in thread Our perl/xs/c app is 30% slower with 64bit 5.24.0, than with 32bit 5.8.9. Why?

For example, if your app is doing lots of sorting of strings, the presence of these defines in the 5.24 build parameters: 

 
USE_LOCALE USE_LOCALE_COLLATE USE_LOCALE_CTYPE USE_LOCALE_NUMERIC USE_
+LOCALE_TIME

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Might be the source of the slowdown; but if your app is purely mathematical, probably not.

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