On Thursday, 20 June 2019 at 01:06:09 UTC, Alex wrote:
Is there a way of creating and initialising a dynamic array ?

for example I am doing this:

auto arr = new float[<big number>];
arr[] = 0.0f;

Profiling indicates that the compiler (gdc) is spending significant time memsetting the whole array to something (nan ?) before I immediately memset it to 0.0f.

It would be good if there was a way of either void initialing it so that the first memset is avoided or a way of replacing the init value with a different one.

Thanks,
Alex

What about:

//DMD64 D Compiler 2.072.2

import std.stdio;
import std.array;

void main(){
    auto s = uninitializedArray!(float[])(100);
    s[] = 0.0f;
    writeln(s[0]);
}

Matheus.

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