Yuki Kimoto's Perl Blog

Perl 5.28 boolean check become fast.

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This branch contains about 50 commits, which collectively optimise various aspects of perl's behaviour when detailing with boolean values or ops that are called in boolean context.

various boolean-related optimisations - perl.git

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Bencmark is very good!

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   36 @  96.55% ..  99.99%
  245 @ 100.00% .. 100.99%
   28 @ 101.00% .. 109.99%
    7 @ 110.00% .. 119.99%
   10 @ 120.00% .. 129.99%
   29 @ 130.00% .. 199.99%
    4 @ 200.00% .. 299.99%
    1 @ 314.29%

so about 10% of tests became marginally slower - usually due to one extra
conditional in an op to test for a private BOOL flag or ReANY(); about 70%
of tests were almost unaffected, while 20% of tests showed improvement,
most with considerable improvement, and a few with spectacular improvement.
(The 314% is for an empty @lexical tested in boolean context).
various boolean-related optimisations - perl.git