[SPARK-48391] use addAll instead of add function in TaskMetrics to accelerate

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.5.0, 3.5.1
• Fix Version/s: 4.0.0, 3.5.2
• Component/s: Spark Core
• Labels: pull-request-available
• Assignee: jiahong.li
• Reporter: jiahong.li
• Created: 22/May/24 13:04
• Updated: 03/Jun/24 04:35
• Resolved: 31/May/24 22:56

Description

In the fromAccumulators method of TaskMetrics，we should use `
tm._externalAccums.addAll` instead of `tm._externalAccums.add`, as _externalAccums is a instance of CopyOnWriteArrayList

Issue Links

• links to: GitHub Pull Request #46705