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Date: Mon, 3 Aug 2020 20:39:32 +0100
Message-ID: <CAJvSBVNqRyQy3JnBquCCAF6eyPd0YWzx1VjqccoRA1LjqiM1WA@mail.gmail.com>
To: Stanislav Malyshev <smalyshev@gmail.com>
Cc: Benjamin Eberlei <kontakt@beberlei.de>, PHP Internals <internals@lists.php.net>, 
	Dmitry Stogov <dmitry@zend.com>, Nikita Popov <nikita.ppv@gmail.com>
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Subject: Re: [PHP-DEV] @@Jit Attribute Considerations
From: phpmailinglists@gmail.com (Peter Bowyer)

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On Mon, 3 Aug 2020 at 19:52, Stanislav Malyshev <smalyshev@gmail.com> wrote:

> I think turning JIT off is a valid use case, the rest looks much more
> iffy. I am not sure we want to let people tell the engine to JIT certain
> functions - are there a lot of cases where the engine wouldn't do it but
> it's actually the right thing to do?
>

Wouldn't a use case be profiling code, to see if JIT makes a difference to
a specific function? So I can profile with JIT disabled globally and @@JIT
on specific code, modify my code and see if it improves the JIT performance?

I'm basing this on my experience with the @jit annotation in Numba (
http://numba.pydata.org/) where it's useful to see the effect on small
pieces of code.

Peter

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