JDK-8152641 : Plugin to generate BMH$Species classes ahead-of-time
  • Type: Enhancement
  • Component: core-libs
  • Sub-Component: java.lang.invoke
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2016-03-24
  • Updated: 2016-05-27
  • Resolved: 2016-04-01
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JDK 9
9 b113Fixed
Related Reports
Relates :  
JDK-8086045 - Improve the java.lang.invoke first initialization costs
Relates :  
JDK-8153317 - Two jimage tests have been failing since JDK-8152641 was fixed
Description
This experiment shows we can win some startup performance on applications that generate java.lang.invoke.BoundMethodHandle$Species* classes:

http://cr.openjdk.java.net/~redestad/scratch/bmh_species_gen.txt

I believe it's an OK start to generate a default list of species types picked from this simple experiment for now, and consider using a profile-driven approach to generate the list of species classes used at build time.