From 47cbb529f5723b246125ae083a193e11481b89ef Mon Sep 17 00:00:00 2001
From: George Halkiadakis <gchalkiadakis@sklavenitis.co.gr>
Date: Sun, 12 Mar 2023 07:01:30 +0200
Subject: initializing classroom structure using anom framework

---
 classes/Benchmark.php | 150 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 150 insertions(+)
 create mode 100644 classes/Benchmark.php

(limited to 'classes/Benchmark.php')

diff --git a/classes/Benchmark.php b/classes/Benchmark.php
new file mode 100644
index 0000000..a7e93ea
--- /dev/null
+++ b/classes/Benchmark.php
@@ -0,0 +1,150 @@
+<?php
+
+// define('BENCHMARKED', true);  // then you know if class is active
+
+class Benchmark {
+
+    private static $timeSpots = Array();
+
+    private static $memoryUse = Array();
+
+    private static $enableReport = true;
+
+    
+    /** add_timespot
+     * ---
+     * add new timespot
+     * @param $key : label of timespot
+     */
+    public static function add_spot(string $key)
+    {
+        self::$timeSpots[$key] = microtime(true);
+        self::$memoryUse[$key] = round(memory_get_usage()/(1024*1024),2);
+    }
+
+
+    /** exist
+     * checks if a benchmark spot  with label $key exists 
+     */
+    public static function exist(string $key) : bool
+    {
+        return isset(self::$timeSpots[$key]);
+    }
+
+
+    /** desableReport
+     * (Self-explanatory)
+     */
+    public static function disableReport()
+    {
+        self::$enableReport = false;
+    }
+
+
+    /** render_benchmark_report
+     * ---
+     * renders performance report
+     * as html comment at the end of webpage in various modes
+     * @param $mode (string)
+     * + 'comment' (default): include report as html comment
+     * + 'html' : include report as a html div
+     * + 'code' : include report as a pre/code block
+     */
+    public static function render_report(string $mode = 'comment' )
+    {
+        if (self::$enableReport) {
+
+            switch ($mode) {
+                case 'html':
+                    $open = '<p>';
+                    $close = '</b></p>';
+                    $divider = ":<b>";
+                    $prefix = '<div>';
+                    $suffix = '</div>';
+                    break;
+                case 'code':
+                    $open = '';
+                    $close = '';
+                    $divider = ": ";
+                    $prefix = '<pre>';
+                    $suffix = '</pre>';
+                    break;
+                case 'comment':
+                default:
+                    $open = '<!--';
+                    $close = '-->';
+                    $divider = ":";
+                    $prefix = '';
+                    $suffix = '';
+                    break;
+            }
+
+            echo $prefix;
+
+            // TIME REPORT 
+            // ---------------------------------------------------------------------
+            echo "\n\n{$open} Timings {$close}";
+
+            // valid from php 7.3
+            // $start = self::$timeSpots[ array_key_first(self::$timespots) ];
+            // $end = self::$timeSpots[ array_key_last(self::$timespots) ];
+            $start = self::$timeSpots['start'];
+            $end = self::$timeSpots['end'];
+            $all_dt = number_format($end - $start , 4)*1000 ." ms";
+
+            
+
+            // if more than 2 timespots
+            // echo dt between each spot
+            if (count(self::$timeSpots) > 2) {
+
+                // calculate dt between spots
+                $time_results = array();
+                $prev_key = '';
+                $prev_time = 0;
+                foreach(self::$timeSpots as $key => $t) {
+                    if (!$prev_time) {
+                        $prev_time = $t;
+                        $prev_key = $key;
+                    }
+                    else {
+                        $dt = number_format($t - $prev_time , 4)*1000 ." ms";
+                        $time_results[] = array(
+                            'part' => "{$prev_key}[..{$key}]", ///$key,
+                            'dt'   => $dt
+                        );
+                        $prev_key = $key; //// "{$prev_key}[..{$key}]";
+                        $prev_time = $t;
+                    }
+                }
+
+                // echo timings
+                foreach ($time_results as $key => $val) {
+                    echo "\n\t{$open} {$val['part']} {$divider} {$val['dt']} {$close}";
+                }
+            }
+
+            // echo total time
+            echo "\n\t{$open} total {$divider} {$all_dt} {$close}";
+
+
+            // MEMORY REPORT
+            // ---------------------------------------------------------------------
+            echo "\n\n{$open} Memory Usage {$close}";
+
+            if (count(self::$memoryUse) > 2) {
+
+                foreach (self::$memoryUse as $key => $val) {
+                    echo "\n\t{$open} {$key} {$divider} {$val}MB {$close}";
+                }
+
+            } else {
+                echo "\n\t{$open} memory usage {$divider} ". round(memory_get_usage()/(1024*1024),2) ."MB {$close}";   
+            }
+
+            echo $suffix;
+
+        }
+        
+    }
+}
-- 
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