1.2.984. Pre-Calculate Use¶
In a closure <https://www.php.net/`closure>`_, it is faster to pass a final value, rather than calculate it at call time.
In the use clause of the closure <https://www.php.net/`closure>`_, make sure that the passed variables do not require any more processing, such as a call to another function or an extra expression.
This is a micro-optimisation. It has more potential with the closure <https://www.php.net/`closure>`_ used in a loop, or an array function.
<?php
// $b->get is calculated inside the closure
$d = $b->get();
$f = function ($a) use ($d) {
return $d + $a;
}
// $b->get is calculated inside the closure
$f = function ($a) use ($b) {
return $b->get() + $a;
}
?>
1.2.984.1. Suggestions¶
Inject the final value in the closure and avoid method calls inside the closure
1.2.984.2. Specs¶
Short name |
Performances/PreCalculateUse |
Rulesets |
|
Exakat since |
2.5.2 |
PHP Version |
All |
Severity |
Minor |
Time To Fix |
Quick (30 mins) |
Precision |
High |
Features |
closure, micro-optimisation |
Available in |