NBT CompoundTag::equals vs. Equality operator (PHP)

nbt-tag-equals-vs-equality-operator.php

<?php

declare(strict_types=1);

use pocketmine\nbt\BigEndianNbtSerializer;

$n_runs = 100;

// wget https://gist.githubusercontent.com/Muqsit/08391495f934f5c47be0f837ac2907ab/raw/6d36652ca8b557bbaf96115a846ed25a1e45e7c6/inventory.json
$inventory = file_get_contents("/home/cosmicpe/dev/plugin_data/Scripter/inventory.json");
$inventory = json_decode($inventory, true, 2, JSON_THROW_ON_ERROR);
$inventory = array_map(hex2bin(...), $inventory);

$serializer = new BigEndianNbtSerializer();
$inventory1 = array_map(fn($x) => $serializer->read($x)->mustGetCompoundTag(), $inventory);
$inventory2 = array_map(fn($x) => $serializer->read($x)->mustGetCompoundTag(), $inventory);

$results1 = [];
$t = hrtime(true);
for($i = 0; $i < $n_runs; $i++){
	foreach($inventory1 as $index => $value){
		$results1[] = $value->equals($inventory2[$index]);
	}
}
$t = hrtime(true) - $t;
echo "equals(): ", number_format($t / 1_000_000, 3), "ms", PHP_EOL;

$results2 = [];
$t = hrtime(true);
for($i = 0; $i < $n_runs; $i++){
	foreach($inventory1 as $index => $value){
		$results2[] = $value == $inventory2[$index];
	}
}
$t = hrtime(true) - $t;
echo "==: ", number_format($t / 1_000_000, 3), "ms", PHP_EOL;

echo "integrity test: ", $results1 === $results2 ? "succeeded" : "failed", PHP_EOL;

equals(): 495.906ms
==: 0.061ms
integrity test: succeeded