Clone benchmark

benchmark.php

<?php

const ITERS = 1000000;

class QueryBuilder {
    public $select;
    public $from;  
    public $where;

    public function withSelect($sel) {
        $that = clone $this; 
        $that->select = $sel;
        return $that;
    }

    public function withFrom($from) {
        $that = clone $this;
        $that->from = $from;
        return $that;
    }

    public function withWhere($where) {
        $that = clone $this;  
        $that->where = $where;
        return $that;
    }

    public function setSelect($sel) {
        $this->select = $sel;
    }

    public function setFrom($from) {
        $this->from = $from;
    }

    public function setWhere($where) {
        $this->where = $where;
    }
}
 
// Ensure all variables are pre-defind, for fairness.
$i = $start = $end = 0;

$start = microtime(true);

for ($i = 0; $i < ITERS; $i++) {
    $q = (new QueryBuilder())->withSelect('1')->withFrom('table')->withWhere('a = b');
    unset($q);
}
 
$end = microtime(true);
printf("Wither methods: %f\n", number_format($end-$start, 4));


$start = microtime(true);


for ($i = 0; $i < ITERS; $i++) {
    $q = new QueryBuilder();
    $q->setSelect('1');
    $q->setFrom('table');
    $q->setWhere('a = b');
    unset($q);
}
 
$end = microtime(true);
printf("Setter methods: %f\n", number_format($end-$start, 4));

output.txt

Wither methods: 2.377100
Setter methods: 1.784800

(Under PHP 7.4.12)