This fixes cases of x == x, which is equivalent to isNaN() for floats or doubles.
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=47805426
Don't print exact sizes to the console.

This is best computed outside PerformanceTracker, which is where
all the other statistic printing takes place.
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=47813509