Benchmark for Collection avg/average

CollectionAvgBenchmarkTest.php

<?php

namespace Illuminate\Tests\Support;

use Illuminate\Support\Benchmark;
use Illuminate\Support\Collection;
use PHPUnit\Framework\TestCase;

class BenchmarkTest extends TestCase
{
   public function testAvg()
   {
       $sizes = [1e1, 1e2, 1e3, 1e4, 1e5, 1e6];

       foreach($sizes as $size) {
           $collection = Collection::range(1, $size)->map(fn ($i) => random_int(100, 1000));

           dump("[NEW] size=$size " . Benchmark::measure( fn () => $collection->avg()) . 'ms');
       }

       foreach($sizes as $size) {
           $collection = Collection::range(1, $size)->map(fn ($i) => random_int(100, 1000));

           dump("[OLD] size=$size " . Benchmark::measure( fn () => $collection->avgOld()) . 'ms');
       }
   }
}