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https://issues.apache.org/jira/browse/ARROW-15332?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated ARROW-15332:
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Labels: pull-request-available (was: )
> [C++] Add new cases and fix issues in IPC read/write benchmark
> --------------------------------------------------------------
>
> Key: ARROW-15332
> URL: https://issues.apache.org/jira/browse/ARROW-15332
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Weston Pace
> Assignee: Weston Pace
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> This breaks out the benchmark changes in ARROW-14577 to allow us to more
> easily demonstrate the effect of the PR.
> First, there are a few problems with the current benchmark:
> * The benchmark named ReadFile is misleading since it is actually reading
> from an in-memory buffer and no OS "read" call is ever issued.
> * Renamed ReadTempFile to ReadCachedFile and added a second case for
> ReadUncachedFile. The former reads a file in the OS' page cache and the
> latter forces a read to actually hit the disk.
> * The TempFile benchmarks were not actually writing the correct amount of
> data and were reporting unrealistically high rates as a result.
> * Adding a "partial read" parameter which, when true, only reads 1/8 the
> columns in the file so we can see the impact of pushdown projection.
> * Slightly reduced the range of parameters to keep the benchmark time
> reasonable (8k columns wasn't telling us anything more than 4k columns).
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