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Date: Mon, 17 Nov 2025 12:00:03 +0100
Message-ID: <CAHXoPRuXvhyiJFYGF5WmF=uBTw7kKUUGvJQ4rQqmmbPFvOTGTA@mail.gmail.com>
Subject: Re: [PHP-DEV] What's the status of the JIT?
To: Brent Roose <brent.roose@jetbrains.com>
Cc: PHP Internals <internals@lists.php.net>
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From: oladoyinbov@gmail.com (Oladoyinbo Vincent)

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Hi brent, your mail went straight to spam, i don't really know the cause
but most people were unable to see this issue.

Kindly restructure the message and resend.

On Fri, 14 Nov 2025, 10:49=E2=80=AFam Brent Roose, <brent.roose@jetbrains.c=
om>
wrote:

> Hi internals
>
> I'm wondering about the state of PHP's JIT these days. I understand that
> Dmitry is still working on his standalone JIT IR framework [1] that's bei=
ng
> used by PHP, and that Arnaud is maintaining it from the Foundation/PHP
> side? In my own benchmarks, done in PHP 8.0 and PHP 8.4; I cannot seem to
> get any meaningful performance gain from the JIT in web applications or i=
n
> tools like PHPStan. [2][3][4]
>
> The question I'm left with is whether the JIT is worth the hassle?
> Assuming the JIT's existence impacts the complexity of internal
> development, I wonder if it wouldn't be better to deprecate it in a futur=
e
> PHP version? To be clear, I'm assuming the JIT impacts internal developme=
nt
> =E2=80=94 maybe that's wrong? Perhaps I'm missing a real-life use case th=
at
> benefits significantly from the JIT as well?
>
> Kind regards
> Brent
>
> [1] https://github.com/dstogov/ir
> [2] https://stitcher.io/blog/jit-in-real-life-web-applications
> [3] https://youtu.be/2Njl1ZiCXIk?si=3DqytMIVxt0oTC3b1F&t=3D1057
> [4] https://www.youtube.com/watch?v=3D5ResKrAnpBw
>

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<div dir=3D"auto">Hi brent, your mail went straight to spam, i don&#39;t re=
ally know the cause but most people were unable to see this issue.<div dir=
=3D"auto"><br></div><div dir=3D"auto">Kindly restructure the message and re=
send.</div></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"g=
mail_attr">On Fri, 14 Nov 2025, 10:49=E2=80=AFam Brent Roose, &lt;<a href=
=3D"mailto:brent.roose@jetbrains.com">brent.roose@jetbrains.com</a>&gt; wro=
te:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;b=
order-left:1px #ccc solid;padding-left:1ex"><div dir=3D"ltr"><div dir=3D"lt=
r">Hi internals<div><br></div><div>I&#39;m wondering about the state of PHP=
&#39;s JIT these days. I understand that Dmitry is still working on his sta=
ndalone JIT IR framework [1] that&#39;s being used by PHP, and that Arnaud =
is maintaining it from the Foundation/PHP side? In my own benchmarks, done =
in PHP 8.0 and PHP 8.4; I cannot seem to get any meaningful performance gai=
n from the JIT in web applications or in tools like PHPStan.=C2=A0[2][3][4]=
</div><div><br></div><div>The question I&#39;m left with is whether the JIT=
 is worth the hassle? Assuming the JIT&#39;s existence impacts the complexi=
ty of internal development, I wonder if it wouldn&#39;t be better to deprec=
ate it in a future PHP version? To be clear, I&#39;m assuming the JIT impac=
ts internal development =E2=80=94 maybe that&#39;s wrong? Perhaps I&#39;m m=
issing a real-life use case that benefits significantly from the JIT as wel=
l?</div><div><br></div><div>Kind regards</div><div>Brent</div><div><br></di=
v><div>[1]=C2=A0<a rel=3D"noreferrer">https://github.com/dstogov/ir</a></di=
v><div>[2]=C2=A0<a rel=3D"noreferrer">https://stitcher.io/blog/jit-in-real-=
life-web-applications</a></div><div>[3]=C2=A0<a rel=3D"noreferrer">https://=
youtu.be/2Njl1ZiCXIk?si=3DqytMIVxt0oTC3b1F&amp;t=3D1057</a></div><div>[4]=
=C2=A0<a rel=3D"noreferrer">https://www.youtube.com/watch?v=3D5ResKrAnpBw</=
a></div></div>
</div>
</blockquote></div>

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