Tag Archives: Java

JMM Synopsis

September 15, 2009 – 11:32 am

Useful synopsis of the Java Memory Model from Doug Lea – in particular the clearest explanation I have found so far of the meaning of “happens-before”, and some useful definitions which helped to get a concrete idea of the semantics around safe-publication of variables through Thread.start()…

By James Furness | Posted in Java | Also tagged , | Comments (0)

NonBlockingHashMap

June 15, 2009 – 9:12 am

Just came across this, looks like it has been around on Sourceforge for a while as part of lib-high-scale. Designed for large numbers of CPUs (e.g. Azul hardware), but microbenchmarks claim a small improvement over ConcurrentHashMap even on 2 CPUs.

By James Furness | Posted in Java | Also tagged , , , , | Comments (0)