[ https://issues.apache.org/jira/browse/CASSANDRA-2850?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
David Allsopp updated CASSANDRA-2850: ------------------------------------- Attachment: 2850-v5.patch OK, v5 attached with bugfix; performance seems at least as good as previous (buggy) version. I _hope_ the patch problems have also gone away - it applies to trunk for me without complaint (using eclipse) and without needing to adjust the fuzz factor! > Converting bytes to hex string is unnecessarily slow > ---------------------------------------------------- > > Key: CASSANDRA-2850 > URL: https://issues.apache.org/jira/browse/CASSANDRA-2850 > Project: Cassandra > Issue Type: Improvement > Components: Core > Reporter: David Allsopp > Assignee: David Allsopp > Priority: Minor > Fix For: 0.8.3 > > Attachments: 2850-rebased.txt, 2850-v2.patch, 2850-v4.patch, > 2850-v4a.patch, 2850-v5.patch, BytesToHexBenchmark.java, > BytesToHexBenchmark2.java, BytesToHexBenchmark3.java, cassandra-2850a.diff > > > ByteBufferUtil.bytesToHex() is unnecessarily slow - it doesn't pre-size the > StringBuilder (so several re-sizes will be needed behind the scenes) and it > makes quite a few method calls per byte. > (OK, this may be a premature optimisation, but I couldn't resist, and it's a > small change) > Will attach patch shortly that speeds it up by about x3, plus benchmarking > test. -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira