Weston Pace created ARROW-15332:
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Summary: [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
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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