On Tuesday, 11 October 2016 at 08:57:46 UTC, Stefan Koch wrote:
On Tuesday, 11 October 2016 at 08:44:04 UTC, Temtaime wrote:


void popFront1(ref char[] s) @trusted pure nothrow
{
  import core.bitop, std.algorithm;
  auto v = bsr(~s[0] | 1);
  s = s[clamp(v, 1, v > 6 ? 1 : $)..$];
}

Seems to be less if i'm not wrong.


Yours runs with 790 us best time.
bsr is a real timetaker :)

CORRECTION this is not bsr's fault.
It's most likely clamp.
I am compiling with dmd and dmd is not as good in optimizing when templates are in the mix.

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