[jboss-jira] [JBoss JIRA] (JGRP-2043) Improve performance of Message#readHeader

[ https://issues.jboss.org/browse/JGRP-2043?page=com.atlassian.jira.plugin.... ] Bela Ban edited comment on JGRP-2043 at 7/13/16 12:47 AM: ---------------------------------------------------------- Turns out this is useless: if a {{MethodHandle}} is not _static_, apparently it cannot be optimized: if we store handles in a map (keyed by magic ID), then performance is about the same as using a constructor, or reflection. The only fast way I've found so far is to create a method handle _indirectly_ via a lambda, ie.: {code:java} Supplier<? extends Header> supplier; Header hdr=supplier.get(); {code} This requires all headers to implement a Creationable interface which returns a supplier. [1] https://github.com/belaban/PerfTests/blob/master/src/main/java/org/perfte... was (Author: belaban): Turns out this is useless: if a {{MethodHandle}} is not _static_, apparently it cannot be optimized: if we store handles in a map (keyed by magic ID), then performance is about the same as using a constructor, or reflection. The onyl fast way I found so far is to create a methd handle _indirectly_ via a lambda, ie.: {code:java} Supplier<? extends Header> supplier; Header hdr=supplier.get(); {code} This requires all headers to implement a Creationable interface which returns a supplier. [1] https://github.com/belaban/PerfTests/blob/master/src/main/java/org/perfte... -- This message was sent by Atlassian JIRA (v6.4.11#64026)