[HBASE-11907] Use the joni byte[] regex engine in place of j.u.regex in RegexStringComparator

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.98.7, 0.99.1
• Hadoop Flags: Reviewed

Release Note

The RegexStringComparator comparator now include an optional EngineType constructor parameter. Use EngineType.JONI to select the joni regex engine, which can be twice as fast as the Java regex engine and will be more efficient, producing less object churn while scanning, because it operates natively on byte arrays. RegexStringComparator still uses the Java regex engine by default.

• Assignee: Andrew Kyle Purtell
• Reporter: Andrew Kyle Purtell
• Created: 06/Sep/14 17:35
• Updated: 06/Apr/18 17:55
• Resolved: 03/Oct/14 06:07

Description

The joni regex engine (https://github.com/jruby/joni), a Java port of Oniguruma regexp library done by the JRuby project, is:

• MIT licensed
• Designed to work with byte[] arguments instead of String
• Capable of handling UTF8 encoding
• Regex syntax compatible
• Interruptible
• About twice as fast as j.u.regex
• Has JRuby's jcodings library as a dependency, also MIT licensed