How to Measure Performance for PHP Function

measurePerformance.php

<?php
function measurePerformance(callable $callback)
{
    // Start measurement
    $startTime = microtime(true);
    $startMemory = memory_get_usage();
    $startCpu = getrusage();

    // Execute the block of code
    $callback();

    // End measurement
    $endTime = microtime(true);
    $endMemory = memory_get_usage();
    $endCpu = getrusage();

    // Calculate elapsed time, memory usage, and CPU times
    $executionTime = $endTime - $startTime;
    $memoryUsed = $endMemory - $startMemory;
    $peakMemoryUsed = memory_get_peak_usage();

    $userTimeUsed = ($endCpu["ru_utime.tv_sec"] * 1e6 + $endCpu["ru_utime.tv_usec"]) - ($startCpu["ru_utime.tv_sec"] * 1e6 + $startCpu["ru_utime.tv_usec"]);
    $sysTimeUsed = ($endCpu["ru_stime.tv_sec"] * 1e6 + $endCpu["ru_stime.tv_usec"]) - ($startCpu["ru_stime.tv_sec"] * 1e6 + $startCpu["ru_stime.tv_usec"]);

    // Output results
    echo "Execution Time: " . $executionTime . " seconds</br>";
    echo "Memory Usage: " . $memoryUsed/1024/1024 . " Mbytes</br>";
    echo "Peak Memory Usage: " . $peakMemoryUsed/1024/1024 . " Mbytes</br>";
    echo "User CPU Time: " . ($userTimeUsed / 1e6) . " seconds</br>";
    echo "System CPU Time: " . ($sysTimeUsed / 1e6) . " seconds</br>";
}
// Example usage:
  measurePerformance(function() {
      return view('web.top');
  });