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Alex Sorokoumov commented on CASSANDRA-15215: --------------------------------------------- CI completed and the failures do not seem to be related. [~benedict] could you please review? > 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: Alex Sorokoumov > Priority: Normal > Fix For: 4.1-alpha1, 4.1 > > Attachments: testWriteRandomLongDOP_final.png, > writeUnsignedVInt_megamorphic_BB.png, writeUnsignedVInt_megamorphic_DOP.png > > Time Spent: 1h 20m > 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 (v8.20.10#820010) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org