We recently posted an article detailing some recent improvements:
https://v8.dev/blog/regexp-tier-up

On Wed, Oct 23, 2019 at 5:12 PM Joel Scarfone <joelrscarf...@gmail.com>
wrote:

> Hi!
>
> I'm looking for details on how v8's regular expression optimizations work
> under the covers, and if there might be something to improve the
> performance of a given regular expressions first execution. From what it
> looks like trying some things out, v8 does most of it's optimizations after
> a call that uses the RegExp and not when the constructor is called (eg.
> through `new RegExp()`).
>
> I am Wondering what some options are in this area to move around the cost
> of compiling/running the regular expression.
>
> Thanks in advance!
>
> Joel
>
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