Add a simple helper for benchmarking

TODO

@@ -28,7 +28,6 @@ autoload_controller(['function']);
 - new redirect_to (support for https)
 - add header X-Limonade-PHP: (lim version name); (cosmetic ;-)
 - use array_walk_recursive for unregister_globals
-- add a simple helper for benchmarking (execution time / memory)
 - simple form helper with XSS/CSRF protection
 - remove examples/ and move it in an external depot
 - public API documentation:

examples/example02/index.php

@@ -130,6 +130,9 @@ function html_my_layout($vars){ extract($vars);?>
 	</p>
 </body>
 </html>
+<!--
+<?php print_r(benchmark()); ?>
+-->
 <?}
 
 

lib/limonade.php

@@ -1698,6 +1698,25 @@ function end_content_for()
   content_for();
 }
 
+/**
+ * Shows current memory and execution time of the application.
+ * 
+ * @access public
+ * @return array
+ */
+function benchmark()
+{
+  $current_mem_usage = memory_get_usage();
+  $execution_time = microtime() - LIM_START_MICROTIME;
+
+  return array(
+    'current_memory' => $current_mem_usage,
+    'start_memory' => LIM_START_MEMORY,
+    'average_memory' => (LIM_START_MEMORY + $current_mem_usage) / 2,
+    'execution_time' => $execution_time
+  );
+}
+