There is a GREAT difference in using SIngle and Double in 64Bit compiler in XE2. Double in XE2 is faster twice as Double in XE and below. BUT Single is 3 times slower than in 32bit. And 5 times slower than Double.
So, use Double whenever it's possible.
Didn't notice link given by Lifepower about this new "feature".
Embarcadero still advice to use Double instead of Single.
Theory is - when you know everything but nothing works.
Practice is - when all works, but you don't know why.
We combine theory and practice - nothing works and nobody knows why
Note that there is a new compiler directive that makes Single performance faster in 64-bit mode:
http://delphitools.info/2011/09/09/h...precision-off/
But it is not on by default.
Yeah and embarcadero deprecate to turn it on.
Theory is - when you know everything but nothing works.
Practice is - when all works, but you don't know why.
We combine theory and practice - nothing works and nobody knows why
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