On Sat, 19 Nov 2011 04:07:51 +0100, bearophile <[email protected]>
wrote:
Do you know why an associative array like this:
uint[immutable(char)[]] aa;
Is almost two times faster than a very similar associative array like
this?
uint[immutable(E)[]] aa;
Where E is a named typed enum of chars like:
enum E : char { a='a', b='b', c='c', d='d', ... }
Testing code:
http://codepad.org/hzcRH8Bd
Bye,
bearophile
take a look at
writeln(typeid(immutable(char)[]).classinfo.name); // TypeInfo_Aya
from rt.typeinfo.ti_Ag
writeln(typeid(immutable(E)[]).classinfo.name); // TypeInfo_Array
from object.d
The string typeinfos use a cheaper hash algorithm.
