vlsi commented on issue #998: Suggestion: Improvement of Autoboxing and Unboxing URL: https://github.com/apache/calcite/pull/998#issuecomment-464091696 @o0lwj0o , >The other potential problem is that Java implement autoboxing and unboxing since JDK 1.5. If run this in low version JDK Not an issue: Calcite is Java 1.8+, so use of Java 1.4 or less is not supported here anyway. >I recommend use “Integer.parseInt(String)” which return type is int to improve its performance. Technically speaking, there's a perf difference, however it is not that big. See https://youtrack.jetbrains.com/issue/IDEA-207267 >“double-Doubel”, “float-Float” There's no performance difference for Double and/or Float in trivial cases.
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