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Date: Fri, 17 Sep 2021 01:13:20 -0400
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To: tyson andre <tysonandre775@hotmail.com>
Cc: "internals@lists.php.net" <internals@lists.php.net>
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Subject: Re: [PHP-DEV] RFC: Add `final class Vector` to PHP
From: matthewmatthew@gmail.com (Matthew Brown)

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I can also give some in-the-trenches perspective of vec's utility, having
spent the last month and a half writing Hack. vec is a really useful data
structure to be able to use explicitly in code. It makes code that uses it
easier to understand.

The main benefit over Vector is that it could be used as a straightforward
replacement for array in many cases, with the same copy-on-write semantics
helping developers avoid spooky action-at-a-distance. I'm confident that by
the time that such a feature would be ready for primetime, there would be
tools in place to assist migrations. We could also presumably allow for
casts between vec and array.

And once opcache is sorted out, I'm also confident that the advice "using
vec will make your code a bit faster" would be a successful recruitment
tool.

Best wishes,

Matt

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