andygrove opened a new pull request, #1108:
URL: https://github.com/apache/datafusion-comet/pull/1108
## Which issue does this PR close?
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N/A
## Rationale for this change
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Provide more visibility into shuffle costs. We already report shuffle write
time but we could not see how long it took to read the input data. This PR adds
a new `read time` metric.
## What changes are included in this PR?
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sometimes worth providing a summary of the individual changes in this PR.
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Add a new custom metric to show the time that it takes for native shuffle to
read its input data.
## How are these changes tested?
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Manually.
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