#1289 calls `getReturnType` for every method on every model, which in
turn calls `getReturnTypeFromDocBlock` which has this code:
```php
$phpDocContext = (new ContextFactory())->createFromReflector($reflection);
```
Extracting the docblock is super slow, always has been. Now that we do
this for every method, this adds up a lot.
Performance on a private commercial project _before_ #1289 was introduced:
```
$ time ./artisan ide-helper:models --write --reset >/dev/null
real 0m2.857s
user 0m1.835s
sys 0m0.129s
```
After #1289 :
```
$ time ./artisan ide-helper:models --write --reset >/dev/null
real 0m54.147s
user 0m47.132s
sys 0m1.047s
```
However, in this case we **do not need** the phpdoc fallback (which is
legitimate and by design for many other cases), because also the Laravel
implementation only works by inspecting the _actual type_, see
https://github.com/laravel/framework/blob/e0c2620b57be6416820ea7ca8e46fd2f71d2fe35/src/Illuminate/Database/Eloquent/Concerns/HasAttributes.php#L570-L575
```php
$returnType = (new ReflectionMethod($this, $method))->getReturnType();
return static::$attributeMutatorCache[get_class($this)][$key] = $returnType &&
$returnType instanceof ReflectionNamedType &&
$returnType->getName() === Attribute::class &&
is_callable($this->{$method}()->get);
```
This side-stepping the phpdoc parsing a) still works correctly and b)
brings us back to the previous performance characteristics:
```
time ./artisan ide-helper:models --write --reset >/dev/null
real 0m2.987s
user 0m1.915s
sys 0m0.120s
```
* ✨ Set properties from model functions returning an Attribute
* ✅ Add test for model Attributes
* 🎨 Fix code style
* 🔖 Update changelog
* ✅ Update test to not require php 8
* 🐛 Fix PHP 7.3 incompatibility
* ✅ Update tests to only run when Illuminate Attribute exists
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Simon Jønsson