MAPG-180 don't buffer content output to variable

src/Response/HtmlContent.php

@@ -12,7 +12,7 @@ class HtmlContent extends ContentBase
         $this->data = &$data;
     }
 
-    public function &render(): string
+    public function render(): void
     {
         if (!empty($_ENV['DEV'])) {
             $generator = new Linker($this->view);
@@ -21,14 +21,9 @@ class HtmlContent extends ContentBase
 
         extract($this->data);
 
-        ob_start();
         require ROOT . '/cache/views/' . $this->view . '.php';
-        $content = ob_get_contents();
-        ob_end_clean();
 
-        $content .= '<!-- __debug__runtime: ' . round((hrtime(true) - SCRIPT_STARTED) / 1e+6, 1) . ' -->';
-
-        return $content;
+        echo '<!-- __debug__runtime: ' . round((hrtime(true) - SCRIPT_STARTED) / 1e+6, 1) . ' -->';
     }
 
     public function getContentType(): string