[9] RFR (M): 8050057: Improve caching of MethodHandle reinvokers (original) (raw)
Vladimir Ivanov vladimir.x.ivanov at oracle.com
Mon Jul 14 15:17:08 UTC 2014
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http://cr.openjdk.java.net/~vlivanov/8050057/webrev.00/ https://bugs.openjdk.java.net/browse/JDK-8050057
Cache MethodHandle reinvokers per basic type. For BoundMethodHandles, rebinding is no-op unless underlying LF is too complex (see BMH::tooComplex() for details).
Also, introduced DelegatingMethodHandle whose invocation behavior is determined by a target MethodHandle. The delegating MH itself can hold extra "intentions" beyond the simple behavior.
AsVarargsCollector and WrappedMember are made subclasses of DelegatingMethodHandle. Also, SimpleMethodHandle extends BoundMethodHandle now.
Rebinding and delegation share same logic and LF shape, but have different caches (LF_REBIND vs LF_DELEGATE). The only difference is their name. They could be consolidated in the future.
Testing: jdk/java/lang/invoke, jdk/java/util/streams, nashorn, octane w/ "-ea -esa" and COMPILE_THRESHOLD={0,30}.
Reviewed-by: vlivanov, ? Contributed-by: john.r.rose at oracle.com
Thanks!
Best regards, Vladimir Ivanov
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