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Posted to dev@flink.apache.org by "Gary Yao (Jira)" <ji...@apache.org> on 2020/04/02 08:33:00 UTC
[jira] [Created] (FLINK-16940) Avoid creating currentRegion HashSet
with manually set initialCapacity
Gary Yao created FLINK-16940:
--------------------------------
Summary: Avoid creating currentRegion HashSet with manually set initialCapacity
Key: FLINK-16940
URL: https://issues.apache.org/jira/browse/FLINK-16940
Project: Flink
Issue Type: Bug
Components: Runtime / REST
Affects Versions: 1.11.0
Reporter: Gary Yao
Assignee: Gary Yao
Fix For: 1.11.0
The {{currentRegion}} HashSet in {{PipelinedRegionComputeUtil}} is created with an initialCapacity of 1. This is wrong because when we add the first element, the sets capacity will be already increased. From the style guidelines:
{quote}
Set the initial capacity for a collection only if there is a good proven reason for that, otherwise do not clutter the code. In case of Maps it can be even deluding because the Map’s load factor effectively reduces the capacity.
{quote}
https://flink.apache.org/contributing/code-style-and-quality-java.html
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