SpringSource/spring-framework — pull request #63 by dukehoops (2012-04-03 23:04:08+00:00)
Title: Avoid monitor contention inside MethodParameter.getParameterAnnotations()

MethodParameter.getParameterAnnotations() calls
Method.getParameterAnnotations() on every invocation. Latter ends up
contending for a monitor inside (Sun) JDK code. Fix by caching values
returned by Method.getParameterAnnotations() in a static ConcurrentMap

Issue: SPR-9298