Poor regex performance?

[Julian]

On Thursday, 4 April 2019 at 09:57:26 UTC, rikki cattermole wrote:
> If you need performance use ldc not dmd (assumed).
>
> LLVM has many factors better code optimizes than dmd does.

Thanks! I already had dmd installed from a brief look at D a long
time ago, so I missed the details at 
https://dlang.org/download.html

ldc2 -O3 does a lot better, but the result is still 30x slower
without PCRE.