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https://issues.apache.org/jira/browse/HDFS-13428?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Íñigo Goiri updated HDFS-13428:
-------------------------------
Summary: RBF: Remove LinkedList From StateStoreFileImpl.java (was: Remove
LinkedList From StateStoreFileImpl.java)
> RBF: Remove LinkedList From StateStoreFileImpl.java
> ---------------------------------------------------
>
> Key: HDFS-13428
> URL: https://issues.apache.org/jira/browse/HDFS-13428
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: federation
> Affects Versions: 3.0.1
> Environment: Replace {{LinkedList}} with {{ArrayList}} implementation
> in the StateStoreFileImpl class. This is especially advantageous because we
> can pre-allocate the internal array before a copy occurs. {{ArrayList}} is
> faster for iterations and requires less memory than {{LinkedList}}.
>
> {code:java}
> protected List<String> getChildren(String path) {
> List<String> ret = new LinkedList<>();
> File dir = new File(path);
> File[] files = dir.listFiles();
> if (files != null) {
> for (File file : files) {
> String filename = file.getName();
> ret.add(filename);
> }
> }
> return ret;
> }{code}
> Reporter: BELUGA BEHR
> Assignee: BELUGA BEHR
> Priority: Trivial
> Attachments: HDFS-13428.1.patch
>
>
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