Show microseconds

Many small PDO queries will report 0ms. This will show microseconds when appropriate.

src/DebugBar/DataCollector/DataCollector.php

@@ -52,7 +52,9 @@ abstract class DataCollector implements DataCollectorInterface
      */
     public function formatDuration($seconds)
     {
-        if ($seconds < 1) {
+        if($seconds < 0.001){
+            return round($seconds * 1000000) . 'μs';
+        }elseif ($seconds < 1) {
             return round($seconds * 1000) . 'ms';
         }
         return round($seconds, 2) . 's';