"jmesnil" wrote : | It seems the bottleneck is the generation of the UUID. | | When using UUID.randomUUID(), the implementation uses a SecureRandom. | If I use Random instead and creates the UUID with new UUID(rand.nextLong(), nextLong(), the perf increases significantely. | I don't think we should be using random UUIDs at all, since they're... well random (so can clash). Instead I think we should use a variant 2 UUID. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4150802#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...