jm + interning   1

don't use String.intern() in Java
String.intern is the gateway to native JVM String table, and it comes with caveats: throughput, memory footprint, pause time problems will await the users. Hand-rolled deduplicators/interners to reduce memory footprint are working much more reliably, because they are working on Java side, and also can be thrown away when done. GC-assisted String deduplication does alleviate things even more. In almost every project we were taking care of, removing String.intern from the hotpaths was the very profitable performance optimization. Do not use it without thinking, okay?
strings  interning  java  performance  tips 
may 2017 by jm

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