Csaba Ringhofer created IMPALA-12171:
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Summary: Slow CSV output in Impala-shell
Key: IMPALA-12171
URL: https://issues.apache.org/jira/browse/IMPALA-12171
Project: IMPALA
Issue Type: Improvement
Components: Clients
Reporter: Csaba Ringhofer
Delimited output is much faster then pretty printing, but can still be the
bottleneck when printing large result sets (50-80% of CPU time in impala-shell).
Was able to significantly improve performance by rewriting adding custom CSV
writer to DelimitedOutputFormatter:
https://gerrit.cloudera.org/#/c/19894/
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