google/re2j

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linear time regular expression matching in Java

Stars: 1.3k
Forks: 165
Open beginner issues: 0
Indexed issues: 26

Dominant language: Java
License: No license data
Last GitHub push: May 22, 2026
Latest indexed: Sep 16, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed
PR merge metrics: No merged PRs in 30d

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26 open issues indexed

10-60X slower compared to java regexes in some cases Open

google/re2j#12 · 5 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Is re2j able to combine multiple regex into one? Open

google/re2j#14 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Future work Open

google/re2j#17 · 14 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Few minor bugs Open

google/re2j#19 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
StackOverflowError for Machine.add Open

google/re2j#77 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
\b does not behave like it does with java.util.regex.Pattern Open

google/re2j#116 · 6 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
LICENSE selection is mildly unclear Open

google/re2j#122 · 1 comment · 2 reactions · 0 assignees · Indexed Sep 16, 2026
Unused Field Open

google/re2j#124 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
\C not implemented Open

google/re2j#133 · 0 comments · 3 reactions · 0 assignees · Indexed Sep 16, 2026
OSS-Fuzz integration Open

google/re2j#135 · 2 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
RFC on unicode tables management Open

google/re2j#161 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Re2j runs 5x slower than java.util.regex Open

google/re2j#162 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Infinite loop in `Pattern#compile` on certain case-insensitive patterns Open

google/re2j#168 · 15 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
What about a new release? Open

google/re2j#175 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Make the library a java module Open

google/re2j#176 · 1 comment · 2 reactions · 0 assignees · Indexed Sep 16, 2026
Resolve regex groups when performing match opertion in one pass. Open

google/re2j#179 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Version 1.8 does not work for GWT anymore Open

google/re2j#182 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
some doubt: Is re2 really linear time ? Open

google/re2j#185 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
scala-native dependency: support regions Open

google/re2j#186 · 1 comment · 2 reactions · 0 assignees · Indexed Sep 16, 2026
scala-native dependency: bugs, inefficiencies, refactors Open

google/re2j#187 · 0 comments · 2 reactions · 0 assignees · Indexed Sep 16, 2026
appendReplacement doesn't throw for invalid replacement groups Open

google/re2j#196 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Behaviour of Matcher#split doesn't match java.util.regex Open

google/re2j#197 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Asymmetric behavior for case-insensitive matches Open

google/re2j#198 · 1 comment · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Behaviour of calling matches() and then find() doesn't match java.util.regex Open

google/re2j#200 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Behaviour of calling Matcher#end after the last match doesn't match java.util.regex Open

google/re2j#201 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026
Pattern "\uDC21"` matches inside a surrogate pair; equivalent classes don't Open

google/re2j#207 · 0 comments · 0 reactions · 0 assignees · Indexed Sep 16, 2026

google/re2j

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