Associative array of strings perf

Alex Rønne Petersen xtzgzorex at gmail.com
Fri Nov 18 20:34:19 PST 2011


On 19-11-2011 04:07, bearophile 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

With an enum, I assume the hashes can be precomputed.

- Alex


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