Feature request: subject string compilation

[scandum]

I looked over the pcre documentation and couldn't find any mentions on this topic.

The situation I have is one where thousands of compiled PCREs are executed on the same subject string.

I was thinking performance could be notably improved if PCRE supported the compilation of the subject string?

[PhilipHazel]

I presume by "compilation of the subject string" you mean some kind of pre-processing of the subject string with a view to speeding up matching. There is indeed nothing of this kind the the PCRE2 implementation, and I'm not sure what kind of "compilation" might work - and of course it would only be beneficial when there are many patterns and few strings, as in your case.

[scandum]

The number of strings shouldn't be relevant, just the regex vs string ratio. Two things come to mind.

1. Locations of new lines in the subject string
2. https://en.wikipedia.org/wiki/Bitmap_index