Github user marmbrus commented on the pull request:
https://github.com/apache/spark/pull/332#issuecomment-40646342
It doesn't appear that your code is actually using macros, so I'm not sure
what the comparison is here. I'd also caution against reading to much into
simple micro benchmarks. Its entirely possible that the JVM is statically
eliminating the if statement or making other simplifications when it JITs this
code, so you might just be measuring the time to add an integer. Also, for
benchmarks you should [use nanoTime not
currentTime](http://stackoverflow.com/questions/351565/system-currenttimemillis-vs-system-nanotime).
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