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https://issues.apache.org/jira/browse/CASSANDRA-9304?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14971400#comment-14971400
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Tyler Hobbs commented on CASSANDRA-9304:
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Interesting. The current formatting call stack is very deep and expensive,
which is okay for normal cqlsh usage, but could definitely be the bottleneck
for {{COPY TO}}. I bet if we pre-fetched the formatting functions for each
expected type and stored them in a local list, we could improve those numbers
dramatically. I can open another ticket for that when I review your recent
changes later today.
> COPY TO improvements
> --------------------
>
> Key: CASSANDRA-9304
> URL: https://issues.apache.org/jira/browse/CASSANDRA-9304
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Reporter: Jonathan Ellis
> Assignee: Stefania
> Priority: Minor
> Labels: cqlsh
> Fix For: 3.x, 2.1.x, 2.2.x
>
>
> COPY FROM has gotten a lot of love. COPY TO not so much. One obvious
> improvement could be to parallelize reading and writing (write one page of
> data while fetching the next).
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