Use IdentityHashmap in Util.TYPES and ClassConfigurator ------------------------------------------------------- Key: JGRP-2481 URL: https://issues.redhat.com/browse/JGRP-2481 Project: JGroups Issue Type: Enhancement Reporter: Bela Ban Assignee: Bela Ban Priority: Minor Fix For: 5.0.0.Beta2 When we have lookup hashmaps, populated at startup, and not changed afterwards, we can use IdentityHashmaps, as a {{get()}} is constant. For keys with a contiguous range (e.g. {{[1 .. 20]}}), we might even use a simple array of keys and values, e.g. {{[K1,V1,K2,V2, ... Kn,Vn}}.