Online PHP editor | rfc for 1PS65

@ 2024-11-07T11:25:02Z

<?php

// Benchmarking function with garbage collection disabled
function benchmark($callback, $iterations = 100)
{
    gc_disable(); // Disable garbage collection for clearer memory tracking

    $startTime = microtime(true);
    $startMemory = memory_get_peak_usage();

    for ($i = 0; $i < $iterations; $i++) {
        $callback();
    }

    $endTime = microtime(true);
    $endMemory = memory_get_peak_usage();

    gc_enable(); // Re-enable garbage collection

    return [
        'time' => $endTime - $startTime,
        'peak_memory' => $endMemory - $startMemory,
    ];
}

// Test data - larger arrays to better see memory impact
$baseArray = range(1, 1000);
$newData = range(1001, 2000);

// Method 1: Using array_merge in a loop
$mergeArray = $baseArray;
$mergeBenchmark = benchmark(function () use (&$mergeArray, $newData) {
    $tempArray = $mergeArray; // Clone array for memory comparison
    $mergeArray = array_merge($tempArray, $newData);
});

// Method 2: Using array unpacking in a loop
$unpackArray = $baseArray;
$unpackBenchmark = benchmark(function () use (&$unpackArray, $newData) {
    $tempArray = $unpackArray; // Clone array for memory comparison
    $unpackArray = [...$tempArray, ...$newData];
});

// Display results
echo "Array Merge:\n";
echo "Time: " . $mergeBenchmark['time'] . " seconds\n";
echo "Peak Memory: " . $mergeBenchmark['peak_memory'] . " bytes\n\n";

echo "Array Unpacking:\n";
echo "Time: " . $unpackBenchmark['time'] . " seconds\n";
echo "Peak Memory: " . $unpackBenchmark['peak_memory'] . " bytes\n";

Output for git.master_jit: Array Merge: Time: 0.059792995452881 seconds Peak Memory: 4202616 bytes Array Unpacking: Time: 0.032917022705078 seconds Peak Memory: 2101736 bytes
Output for git.master: Array Merge: Time: 0.063530921936035 seconds Peak Memory: 4202616 bytes Array Unpacking: Time: 0.029899120330811 seconds Peak Memory: 2101736 bytes

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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