Hi, I'd like to improve our advanced String concat strategy, MH_INLINE_SIZED_EXACT, with skipping the storage initialization: https://bugs.openjdk.java.net/browse/JDK-8150463
Webrev: http://cr.openjdk.java.net/~shade/8150463/webrev.01/ Performance had improved, as planned: http://cr.openjdk.java.net/~shade/8150463/perf.txt The rest of the difference against BC_SB strategy is code-generation quirks, to be addressed separately. We pay some price for a runtime final index check to strengthen against inadvertent bugs in concatenation code. This patch does not affect the String concatenation at this point, because we are still running with BC_SB strategy. I ran through java/lang/String jtregs to see if MH_INLINE_SIZED_EXACT works as expected. Therefore, I don't think this needs to wait for Jigsaw integration. But, it can also wait, no problem. I'll let Jigsaw folks to decide on integration timing. Thanks, -Aleksey
