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Todd Lipcon resolved KUDU-2847. ------------------------------- Fix Version/s: 1.11.0 Resolution: Fixed > Optimize iteration over selection vector in SerializeRowBlock > ------------------------------------------------------------- > > Key: KUDU-2847 > URL: https://issues.apache.org/jira/browse/KUDU-2847 > Project: Kudu > Issue Type: Improvement > Components: perf, tserver > Reporter: Todd Lipcon > Assignee: ZhangYao > Priority: Major > Fix For: 1.11.0 > > > Currently, SerializeRowBlock operates column-by-column, which means we have > to iterate over the selection bitmap once for each column. This code isn't > particularly well optimized -- in TPCH Q6, about 10% of CPU is spent in > BitmapFindFirst. We should look at alternate implementations here that better > amortize the bitmap iteration cost across all of the columns and generally > micro-optimize it. -- This message was sent by Atlassian Jira (v8.3.2#803003)