[ARROW-14249] [R] Slow down in dataframe-to-table benchmark

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Not A Bug
• Fix Version/s: 6.0.0
• Component/s: R
• External issue URL: https://github.com/apache/arrow/issues/29827
• Assignee: Unassigned
• Reporter: Jonathan Keane
• Created: 07/Oct/21 00:31
• Updated: 11/Jan/23 08:38
• Resolved: 07/Oct/21 16:24

Description

It looks like there was a slowdown in our dataframe-to-table benchmark after Arrow-13164.

I'm a bit surprised since that PR is about arrow -> R conversion (though there might be some crossover).

Here's a recent conbench link that shows the the regression https://conbench.ursa.dev/benchmarks/8533b3e9ea654bcea8ccd1fe448861ba/

It looks like it happens with types: integer, float, and dict, but not strings