Void initialization

[bearophile]

Bear:

> Using D1, I have a program that creates tons of float[] ; for performance
> reasons, I would like them to be uninitialized.
> I've tried replacing
> 
> float[] f = new float[x];
> by
> float[] f = cast(float[])std.gc.malloc(x*4);

Try something like this (untested):

alias float TF;
TF[] f = (cast(TF*)std.gc.malloc(x * TF.sizeof))[0 .. x];

Using x*4 is error-prone. I suggest to wrap that code inside a templated function, where T is the type of the items, to avoid some bugs.

Bye,
bearophile