[ARROW-3406] [C++] Create a caching memory pool implementation

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Won't Do
• Affects Version/s: 0.11.0
• Component/s: C++
• Labels: query-engine
• External issue URL: https://github.com/apache/arrow/issues/19733
• Assignee: Unassigned
• Reporter: Antoine Pitrou
• Created: 02/Oct/18 15:29
• Updated: 11/Jan/23 07:27
• Resolved: 05/Aug/21 09:12

Description

A caching memory pool implementation would be able to recycle freed memory blocks instead of returning them to the system immediately. Two different policies may be chosen:

• either an unbounded cache
• or a size-limited cache, perhaps with some kind of LRU mechanism

Such a feature might help e.g. for CSV parsing, when reading and parsing data into temporary memory buffers.