[GROOVY-7873] Regression performance issue in string methods

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.4.7
• Fix Version/s: 2.4.8
• Assignee: John Wagenleitner
• Reporter: Tadas Krivickas
• Created: 23/Jun/16 12:11
• Updated: 01/Feb/17 23:19
• Resolved: 25/Jun/16 05:37

Description

Starting with 2.4.7, performance in string processing (in certain scenarios) has decreased dramatically. Specifically, it happens when using stripMargin() on a GString that has a variable substitution with a huge String value. In our app performance decrease was from tens of miliseconds to 1+ minute.
I suspect the latest refactoring in string methods.

Attaching a test case.

R2D2:groovystrperf tadaskay$ /usr/local/Cellar/groovy/2.4.7/bin/groovy test.groovy
Took 1456 ms
R2D2:groovystrperf tadaskay$ /usr/local/Cellar/groovy/2.4.5/bin/groovy test.groovy
Took 43 ms

Issue Links

• links to: GitHub Pull Request #356