JDK-8043002 : Improve performance of Nashorn equality operators
  • Type: Enhancement
  • Component: core-libs
  • Sub-Component: jdk.nashorn
  • Affected Version: 9
  • Priority: P2
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2014-05-13
  • Updated: 2015-01-21
  • Resolved: 2014-05-14
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8u40Fixed 9 b17Fixed
Nashorn equality operators check the types of their operands. The JSType.of() function that it uses does a costly distinction between OBJECT and FUNCTION, but that's unnecessary for the equality algorithm. A new "ofNoFunction" method that does not distinguish OBJECT and FUNCTION types is needed.

This is one of recently discovered significant performance bottlenecks in Avatar.