[ https://issues.apache.org/jira/browse/CASSANDRA-15215?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Benedict Elliott Smith updated CASSANDRA-15215: ----------------------------------------------- Fix Version/s: 4.1 (was: 3.0.x) (was: 4.x) (was: 3.11.x) Since Version: 4.1 Source Control Link: [35dbcc2c2dbe1c826fd6ecd6e8357f0f5a9bab02|https://github.com/apache/cassandra/commit/35dbcc2c2dbe1c826fd6ecd6e8357f0f5a9bab02] Resolution: Fixed Status: Resolved (was: Ready to Commit) > VIntCoding should read and write more efficiently > ------------------------------------------------- > > Key: CASSANDRA-15215 > URL: https://issues.apache.org/jira/browse/CASSANDRA-15215 > Project: Cassandra > Issue Type: Bug > Components: Local/Compaction, Local/SSTable > Reporter: Benedict Elliott Smith > Assignee: Aleksandr Sorokoumov > Priority: Normal > Fix For: 4.1 > > Attachments: testWriteRandomLongDOP_final.png, > writeUnsignedVInt_megamorphic_BB.png, writeUnsignedVInt_megamorphic_DOP.png > > Time Spent: 40m > Remaining Estimate: 0h > > Most vints occupy significantly fewer than 8 bytes, and most buffers have >= > 8 bytes spare, in which case we can construct the relevant bytes in a > register and memcpy them to the correct position. Since we read and write a > lot of vints, this waste is probably measurable, particularly during > compaction and flush, and can probably be considered a performance bug. -- This message was sent by Atlassian Jira (v8.20.1#820001) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org