ReentrantLock performance regression between JDK5 and 6/7?

Clemens Eisserer linuxhippy at
Thu Aug 11 08:37:13 PDT 2011

Hi Vitaly,

Which OS are you using?
Linux-3.0 (Fedora 15)

> Also, you should use System.nanoTime() for this type of timing as it gives
> you a more precise timer.
I tried, but results remained the same. ~53ms for jdk6/7, ~41 for JDK5.
I was using the server compiler both times.

Thanks, Clemens
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