[ARROW-3542] [C++] Use unsafe appends when building array from CSV

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.11.0
• Fix Version/s: 0.12.0
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/19856
• Assignee: Antoine Pitrou
• Reporter: Antoine Pitrou
• Created: 17/Oct/18 14:26
• Updated: 11/Jan/23 07:28
• Resolved: 17/Oct/18 17:29

Description

When reading a Table from a CSV file, we presize each ArrayBuilder with the right number of elements, so we could unsafe appends. It should make things a small bit faster.

Issue Links

• links to: GitHub Pull Request #2780