Summary

Description

Tag for performance-related improvements/optimizations

Issues: Unresolved

Key Summary Due Date
Bug MAPREDUCE-5908 java.lang.NoSuchMethodError: org.apache.commons.io.IOUtils.closeQuietly(Ljava/io/Closeable;)V
Improvement MAPREDUCE-3235 Improve CPU cache behavior in map side sort
Improvement MAPREDUCE-3895 Speculative execution algorithm in 1.0 is too pessimistic in many cases

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Issues: Updated recently

Key Summary Updated
Improvement MAPREDUCE-6626 Reuse ObjectMapper instance in MapReduce
Improvement MAPREDUCE-6615 Remove useless boxing/unboxing code (Hadoop MapReduce)
Improvement MAPREDUCE-6473 Job submission can take a long time during Cluster initialization

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Versions: Unreleased

Name Release date
Unreleased 0.20.204.0
Unreleased 3.0.0  
Unreleased MR-3902  
Unreleased MR-2454  
Unreleased 1.3.0  
Unreleased 2.4.0
Unreleased fs-encryption  
Unreleased 2.8.0  
Unreleased YARN-2928  
Unreleased 2.7.3  
Unreleased 2.9.0  
Unreleased 2.6.5  
Unreleased 2.7.4  

...and 8 more

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