[ARROW-10399] [R] Fix performance regression from cpp11::r_string

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Fix Version/s: 3.0.0
• Component/s: R
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/26382
• Assignee: Neal Richardson
• Reporter: Neal Richardson
• Created: 26/Oct/20 22:10
• Updated: 11/Jan/23 08:13
• Resolved: 27/Oct/20 20:33

Description

On a taxi CSV read demo, reading a data.frame went from ~7 seconds to ~30 seconds. One of the cpp11 changes was identified to be a cause, and reverting it recovered the lost performance.

Issue Links

• links to: GitHub Pull Request #8536