Thanks for posting this, but I think this is mostly taken out of context. There are two really key bits here.
First is that this change is only in ripgrep on master. It's not in a release. It will be in the next release. If you want this in your ripgrep, then `cargo install --git https://github.com/BurntSushi/ripgrep ripgrep` should do the trick. (Add `--features pcre2` if you want that.)
Second is that this make ripgrep around twice as fast for a certain (albeit pretty common) class of regexes. For example, it likely applies to the patterns `sherlock` and `\w+\s+sherlock\s+\w+`, but not to `sherlock|watson`. The latter uses a multi-substring search which isn't SIMD-ified on aarch64 yet. (That is, loosely speaking, my next step. Then hopefully release ripgrep 14 soon there after.)
