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https://issues.apache.org/jira/browse/JEXL-277?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17045730#comment-17045730
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Henri Biestro commented on JEXL-277:
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Changeset: bfa64f34a7a03e025e2ff7f4e458094ef349114c
Author: henrib <[email protected]>
Date: 2020-02-26 18:23
Message: JEXL-277: fast path basic arithmetic ops on primitive relative
numbers (long, int, short...), check overflows
> Speedup arithmetic evaluations
> ------------------------------
>
> Key: JEXL-277
> URL: https://issues.apache.org/jira/browse/JEXL-277
> Project: Commons JEXL
> Issue Type: Improvement
> Affects Versions: 3.1
> Environment: The [PR
> 15|https://github.com/apache/commons-jexl/pull/15] is prepared for this ticket
> Reporter: Dmitri Blinov
> Assignee: Henri Biestro
> Priority: Minor
> Fix For: 3.2
>
>
> As of now, Jexl inefficiently evaluates operators *+*, *-*, */*, *%*, *\** on
> Integer and Long types as it casts operands to BigInteger type, applies
> operation and casts the result back. This for example, creates 3 BigInteger
> instances for a simple operation of 1+1. All evaluations on Integer types,
> and in some cases, on Long types, can be performed on corresponding primitive
> *long* values, which is a magnitute of 200%-300% faster, in my measurments,
> and unneeded objects are not allocated on heap. Another point is to make
> selfAssign operators *overridable* in descendands of JexlArithmetic, instead
> of being able to be *oveloaded*, which can save the time by avoiding
> reflection when using syntax like {code}x += 1{code}.
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