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readme: mention --auto-hybrid-regex in advantages

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This feature solves a major reason I was skeptical of using ripgrep, so
I think it’s good to mention it in the section about why one should use
it.

I use backreferences a lot, so I had previously thought that ripgrep
would provide no speed advantage over ag, since I would always have
`-P` enabled. But when I saw `--auto-hybrid-regex` in the 11.0.0
changelog, I learned that ripgrep can use it to speed up simple queries
while still allowing me to write backreferences.

PR #1253
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Rory O’Kane 2019-04-16 17:21:40 -04:00 committed by Andrew Gallant
parent 1f1cd9b467
commit 6ffd434232
1 changed files with 2 additions and 1 deletions
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README.md
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@ -108,7 +108,8 @@ increases the times to `2.640s` for ripgrep and `10.277s` for GNU grep.
* ripgrep has optional support for switching its regex engine to use PCRE2. * ripgrep has optional support for switching its regex engine to use PCRE2.
Among other things, this makes it possible to use look-around and Among other things, this makes it possible to use look-around and
backreferences in your patterns, which are not supported in ripgrep's default backreferences in your patterns, which are not supported in ripgrep's default
regex engine. PCRE2 support is enabled with `-P`. regex engine. PCRE2 support can be enabled with `-P` (use PCRE2 always) or
`--auto-hybrid-regex` (use PCRE2 only if needed).
* ripgrep supports searching files in text encodings other than UTF-8, such * ripgrep supports searching files in text encodings other than UTF-8, such
as UTF-16, latin-1, GBK, EUC-JP, Shift_JIS and more. (Some support for as UTF-16, latin-1, GBK, EUC-JP, Shift_JIS and more. (Some support for
automatically detecting UTF-16 is provided. Other text encodings must be automatically detecting UTF-16 is provided. Other text encodings must be