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Re: Perl 5.26.0-RC1 is now available!

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Dave Mitchell
May 22, 2017 12:02
Re: Perl 5.26.0-RC1 is now available!
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On Sun, May 14, 2017 at 12:33:36AM +0200, Ævar Arnfjörð Bjarmason wrote:
> The tip of that branch are a bunch of "TODO perldelta: *" commits
> where I don't know what should be said, but think that something
> should be clarified/fixed by others who actually know what these
> entries are referring to.

I've made some further changes to your TODO bits and some of the previous
fixes for them with v5.26.0-RC1-49-g8928e7d
>  Several other ops may now also be faster in boolean context.
> +    Could we be a bit less vague here? Arithmetic ops? stuff like
> +    print, what?

I've removed that sentence because it's essentially wrong.

>  Speed up C<AV> and C<HV> clearing/undeffing.
> +    Does this mean that `undef %h` and `undef @a` are faster, or is it
> +    for some reason only the internal XS stuff? If it's the former
> +    (which I assume) let's use the more readable forms someone not
> +    deep into XS will know about.

I've removed your fix for this because that relatively small speedup
was dwarved by a later change to list assignment that was getting 33%
speedups. Instead I've expanded the following section:

>  =item *
>  Better optimise array and hash assignment

Indomitable in retreat, invincible in advance, insufferable in victory
    -- Churchill on Montgomery

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