Se mueve todo a extension de pruebas

app/tests/extension/AbstractPerformance.php

@@ -0,0 +1,17 @@
+<?php
+namespace ProVM\Tests\Extension;
+
+use PHPUnit\Framework\TestCase;
+
+abstract class AbstractPerformance extends TestCase
+{
+    protected float $startTime;
+    protected function start(): void
+    {
+        $this->startTime = microtime(true);
+    }
+    protected function end(): float
+    {
+        return microtime(true) - $this->startTime;
+    }
+}