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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