feat: began writing on wine registration

test.php

@@ -0,0 +1,45 @@
+<?php
+// example code
+
+function T($arr, $p) {
+    foreach ($arr as $a) {
+        if ($a['parent'] === $p) {
+            T($arr, $a['uid']);
+        }
+    }
+}
+
+function testOne($numItems) {
+    $arr = [];
+    for ($i = 0; $i < $numItems; $i++) {
+        $arr[] = [
+            'uid' => $i+1,
+            'parent' => rand(0, $i)
+        ];
+    }
+
+    $before = hrtime()[1];
+    T($arr, 0);
+    $after = hrtime()[1];
+
+    $delta = $after - $before;
+
+    return $delta;
+}
+
+function testAvg($numItems, $numRuns) {
+    $execTimes = [];
+    for ($i = 0; $i < $numRuns; $i++) {
+        $execTimes[] = testOne($numItems);
+    }
+
+    sort($execTimes);
+    $med = round($execTimes[count($execTimes)/2] / 4206040);
+
+    #echo("$numItems took on average $med time units. ($numRuns sample size)\n");
+    echo("($numItems, $med)\n");
+}
+
+for ($i = 0; $i <= 5000; $i += 100) {
+    testAvg($i, 10);
+}