Github user StephanEwen commented on the pull request:

    https://github.com/apache/flink/pull/1866#issuecomment-208312329
  
    Looks good. One optimization suggestion: Replace
    ```java
    if (value > this.max) {
        this.max = value;
     }
    ```
    by
    ```java
    this.max = Math.max(this.max, value);
    ```
    That is a branch-free variant, because (as far as I know) these Math 
functions are JIT intrinsics and become special assembler instructions in the 
end.
    
    (See: 
http://www.slideshare.net/RednaxelaFX/green-teajug-hotspotintrinsics02232013 
and 
http://hg.openjdk.java.net/jdk8/jdk8/hotspot/file/87ee5ee27509/src/share/vm/classfile/vmSymbols.hpp)


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