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In-Reply-To: <8d69c4d4-d393-4085-b60a-1063155ee8a3@app.fastmail.com>
Date: Thu, 20 Mar 2025 16:56:55 +0200
Message-ID: <CAMW7n8AYD_dNxh=HUSK=4ujpypkhCGqB0--_c4Jae-=FjqHR4Q@mail.gmail.com>
Subject: Re: [PHP-DEV] PHP True Async RFC - Stage 2
To: Rob Landers <rob@bottled.codes>
Cc: "Rowan Tommins [IMSoP]" <imsop.php@rwec.co.uk>, internals@lists.php.net
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From: edmond.ht@gmail.com (Edmond Dantes)

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>
>  This example highlights one of the concerns I have with fibers and this
approach in general. That example will still execute synchronously, taking
file_get_contents() * 3, even though it is in a coroutine function.
>

Is that really a problem? If a programmer wrote the code `$x = 1 / 0`, then
the issue is definitely not with the division operation.

> If you wanted to make it asynchronous, you'd have to do something like so:

Because this is more of an anti-example :) You shouldn't write code like
this. But if you really want to, at least do it like this:

```php
$x = await spawn fn => [spawn file_get_contents($a), spawn
file_get_contents($b), spawn file_get_contents($c)];
```

But this is also an anti-example because what's the point of writing the
same code three times when you can use a concurrent iterator?

```php
$x = await Async\map([$a, $b, $c], "file_get_contents");
```

(The functions will be included in another RFC)

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<div dir=3D"ltr"><div dir=3D"ltr">&gt;<br>&gt;=C2=A0

This example highlights one of the concerns I have with fibers and this app=
roach in general. That example will still execute synchronously, taking fil=
e_get_contents() * 3, even though it is in a coroutine function.<br>&gt;</d=
iv><div dir=3D"ltr"><br></div><div dir=3D"ltr">Is that really a problem? If=
 a programmer wrote the code `$x =3D 1 / 0`, then the issue is definitely n=
ot with the division operation.<br></div><div dir=3D"ltr"><br></div><div di=
r=3D"ltr">&gt; If you wanted to make it asynchronous, you&#39;d have to do =
something like so:</div><div dir=3D"ltr"><br></div><div dir=3D"ltr">Because=
 this is more of an anti-example :) You shouldn&#39;t write code like this.=
 But if you really want to, at least do it like this:<br></div><div dir=3D"=
ltr"><br></div><div>```php</div><div>$x =3D await spawn fn =3D&gt; [spawn f=
ile_get_contents($a), spawn file_get_contents($b), spawn file_get_contents(=
$c)];</div><div>```</div><div><br></div><div>But this is also an anti-examp=
le because what&#39;s the point of writing the same code three times when y=
ou can use a concurrent iterator?<br></div><div><br></div><div>```php</div>=
<div>$x =3D await Async\map([$a, $b, $c], &quot;file_get_contents&quot;);</=
div><div>```</div><div><br></div><div>(The functions will be included in an=
other RFC)=C2=A0=C2=A0<br></div></div>

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