Hi, The following webrev adds support for RewriteFrequentPairs to the template interpreter for aarch64. http://cr.openjdk.java.net/~enevill/8081289/webrev.00 This was contributed by Alexander Alexeev (alexander.alexeev@caviumnetworks.com) This gives a small improvement to the interpreter on aarch64, and brings it in line with all the other ports (x86, sparc, ppc, zero) which all support RewriteFrequentPairs. I have done some performance measurement using -Xint with some micro benchmarks and I see a small improvement on each. java dhrystone: +9% embedded caffeinemark: +4% grinderbench: +1% dacapo (avrora): +1% Tested with hotspot jtreg:- Original: Test results: passed: 787; failed: 24; error: 44 With patch: Test results: passed: 785; failed: 24; error: 46 The difference in the # of errors is due to timeouts because we are running -Xint. Please review and if OK I will push. All the best, Ed.