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Posted to common-issues@hadoop.apache.org by "Wei-Chiu Chuang (JIRA)" <ji...@apache.org> on 2019/07/31 02:22:00 UTC
[jira] [Assigned] (HADOOP-16267) Performance gain if you use
replace() instead of replaceAll() for replacing patterns that do not use a
regex
[ https://issues.apache.org/jira/browse/HADOOP-16267?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Wei-Chiu Chuang reassigned HADOOP-16267:
----------------------------------------
Assignee: bd2019us
> Performance gain if you use replace() instead of replaceAll() for replacing patterns that do not use a regex
> -------------------------------------------------------------------------------------------------------------
>
> Key: HADOOP-16267
> URL: https://issues.apache.org/jira/browse/HADOOP-16267
> Project: Hadoop Common
> Issue Type: Improvement
> Affects Versions: 3.1.2
> Reporter: bd2019us
> Assignee: bd2019us
> Priority: Minor
> Labels: pull-request-available
> Attachments: HADOOP-16267.patch
>
>
> Performance gain if you use replace() instead of replaceAll() for replacing patterns that do not use a regex. This happens because replace() does not need to compile the regex pattern like replaceAll() does.
> Affected files:
> * hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/mapred/CopyCommitter.java
> * hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/state/Graph.java
> * hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/util/PrintJarMainClass.java
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