JDK-8010849 : (str) Optimize StringBuilder.append(null)
  • Type: Enhancement
  • Component: core-libs
  • Sub-Component: java.lang
  • Priority: P4
  • Status: Closed
  • Resolution: Fixed
  • Submitted: 2013-03-26
  • Updated: 2013-05-23
  • Resolved: 2013-04-08
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8 b86Fixed
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Martin Buchholz <martinrb@google.com> writes:

One of our users noticed that a lot of CPU time was being spent in StringBuilder.append(null).
We can apply the previously proven optimization that improves it by a factor of 2 on microbenchmarks.
This change actually breaks StringBuffer synchronization in the null case - see 8014814.