Hi, this patch removes the alternative, undocumented strategies from StringConcatFactory.
The default strategy has been optimized and stabilized since inception in JDK 9, while the alternative strategies have been falling behind
both in terms of performance and stability - while adding maintenance cost. The removal allows some simplifications to the code that will reduce per callsite bootstrap overhead, and reduce what we need to load eagerly during bootstrap. I've also applied the pattern from JDK-8218173 to the remaining Stringifier method handles, which further improve robustness of bootstrapping under an OOME condition. Webrev: http://cr.openjdk.java.net/~redestad/8245455/open.00/ Bug: https://bugs.openjdk.java.net/browse/JDK-8245455 Testing: tier1-3 Thanks! /Claes
