Hmm. I have tested old version od dmd and ldc with BitNFA, but it does not help much with those two cases

actual version of ldc:

240.964 - 92
211.433 - 5301
6.76683 - 5

ldc 1.2:
215.158 - 92
190.255 - 5301
6.58155 - 5

So there is some improvments but not as much as I would expected.

On Wed, Sep 20, 2017 at 6:54 AM, Dmitry Olshansky via Digitalmars-d <digitalmars-d@puremagic.com> wrote:
On Tuesday, 19 September 2017 at 19:52:57 UTC, Daniel Kozak wrote:
Is there a plan to make BitNFA back?

 Yes, the moment we have CTFE that doesn't leak.

Is possible that newCTFE will improve problem with memory?

 It should but it doesn't support classes and exceptions. I need them.

Or it is possible to improve those slow cases?

 There are many other things but BitNFA is a nobrainer - all the work has been already done and it is super fast where applicable.

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Dmitry Olshansky