zlib performance

[yawniek via Digitalmars-d-learn]

On Friday, 7 August 2015 at 08:05:01 UTC, Daniel Kozák wrote:
> import
>   std.zlib,
>   std.file,
>   std.stdio,
>   std.conv;
>
> void main(string[] args)
> {
>   auto f = File(args[1], "rb");
>   auto uncompressor = new UnCompress(HeaderFormat.gzip);
>
>   foreach (buffer; f.byChunk(4096))
>   {
>           auto uncompressed =
>   cast(char[])(uncompressor.uncompress(buffer.idup));
>   write(uncompressed); }
>   write(cast(char[])uncompressor.flush);
> }
>
> this is faster for me than zcat

not here on os x:
d version:  3.06s user 1.17s system 82% cpu 5.156 total
gzcat   1.79s user 0.11s system 99% cpu 1.899 total