On Jan 15, 2015, at 1:32 PM, Claes Redestad <claes.redes...@oracle.com> wrote:
> Hi, > > please review this patch to use double-checked locking to avoid > synchronization overhead on repeated access to the > declaredAnnotations field in Executable and Field. > > webrev: http://cr.openjdk.java.net/~redestad/8068736/webrev.00 > bug: https://bugs.openjdk.java.net/browse/JDK-8068736 > +1 Paul. > Testing: jtreg java/lang > > Benchmarking: > - no significant changes in a small set of SPEC benchmarks > - up to 4x in micros focused on repeated access to the > declaredAnnotations field, both in single- and multithreaded setups > - less than 5% cost (not statistically significant) on micros accessing > the declaredAnnotation map of a method only once. > > /Claes
