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How to optimize object creation in recursive functions through dependency injection?
How to optimize object creation in recursive functions through dependency injection?
Apr 01, 2025 am 08:21 AM
Recursive function object creation optimization: application of dependency injection
Efficient code writing requires continuous optimization. This article discusses a recursive function optimization case to solve the problem of resource waste caused by repeated creation of objects.
The existing recursive functions are as follows:
function get_superior_area($id,$level,$field='id'){
$area = new \app\admin\model\area;
$result = $area->get($id);
if($result['level'] > $level){
return get_superior_area($result['pid'],$level,$field);
}else{
return $result[$field];
}
}
Each time this function is called recursively, a new \app\admin\model\area object will be created, causing performance losses.
For optimization, we can use dependency injection. Dependency injection is a design pattern that passes dependencies into a function as parameters rather than created inside the function. This way, objects can be created outside the function and reused in recursive calls.
Improved functions:
function get_superior_area($id, $level, $field = 'id', $area = null) {
if ($area === null) {
$area = new \app\admin\model\Area;
}
$result = $area->get($id);
if ($result['level'] > $level) {
return get_superior_area($result['pid'], $level, $field, $area);
} else {
return $result[$field];
}
}
By passing the $area object as a parameter, the object is created by the first call and the subsequent recursive call reuse of the object, avoiding repeated creation, improving performance, and enhancing the testability and maintainability of the code. This method effectively optimizes resource utilization.
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