diff --git a/src/Composer/Downloader/TransportException.php b/src/Composer/Downloader/TransportException.php
index c682df080..b46f22e4c 100644
--- a/src/Composer/Downloader/TransportException.php
+++ b/src/Composer/Downloader/TransportException.php
@@ -20,6 +20,7 @@ class TransportException extends \RuntimeException
     protected $headers;
     protected $response;
     protected $statusCode;
+    protected $totalResponseTime;
 
     public function setHeaders($headers)
     {
@@ -50,4 +51,14 @@ class TransportException extends \RuntimeException
     {
         return $this->statusCode;
     }
+
+    public function getTotalResponseTime()
+    {
+        return $this->totalResponseTime;
+    }
+
+    public function setTotalResponseTime($totalResponseTime)
+    {
+        $this->totalResponseTime = $totalResponseTime;
+    }
 }
diff --git a/src/Composer/Util/Http/CurlDownloader.php b/src/Composer/Util/Http/CurlDownloader.php
index 5345f5ce3..96d20eab7 100644
--- a/src/Composer/Util/Http/CurlDownloader.php
+++ b/src/Composer/Util/Http/CurlDownloader.php
@@ -303,7 +303,10 @@ class CurlDownloader
                     if (!$error && function_exists('curl_strerror')) {
                         $error = curl_strerror($errno);
                     }
-                    throw new TransportException('curl error '.$errno.' while downloading '.Url::sanitize($progress['url']).': '.$error);
+
+                    $exception = new TransportException('curl error '.$errno.' while downloading '.Url::sanitize($progress['url']).': '.$error);
+                    $exception->setTotalResponseTime($progress['total_time_us']);
+                    throw $exception;
                 }
                 $statusCode = $progress['http_code'];
                 rewind($job['headerHandle']);
@@ -322,11 +325,13 @@ class CurlDownloader
                         $contents = stream_get_contents($job['bodyHandle']);
                     }
                     $response = new Response(array('url' => $progress['url']), $statusCode, $headers, $contents);
+                    $response->setTotalResponseTime($progress['total_time_us']);
                     $this->io->writeError('['.$statusCode.'] '.Url::sanitize($progress['url']), true, IOInterface::DEBUG);
                 } else {
                     rewind($job['bodyHandle']);
                     $contents = stream_get_contents($job['bodyHandle']);
                     $response = new Response(array('url' => $progress['url']), $statusCode, $headers, $contents);
+                    $response->setTotalResponseTime($progress['total_time_us']);
                     $this->io->writeError('['.$statusCode.'] '.Url::sanitize($progress['url']), true, IOInterface::DEBUG);
                 }
                 fclose($job['bodyHandle']);
diff --git a/src/Composer/Util/Http/Response.php b/src/Composer/Util/Http/Response.php
index 29dd934d5..743ab68f3 100644
--- a/src/Composer/Util/Http/Response.php
+++ b/src/Composer/Util/Http/Response.php
@@ -20,6 +20,7 @@ class Response
     private $code;
     private $headers;
     private $body;
+    private $totalResponseTime;
 
     public function __construct(array $request, $code, array $headers, $body)
     {
@@ -69,6 +70,20 @@ class Response
         return $this->body;
     }
 
+    /**
+     * Total duration time it took for the response in micro seconds
+     * @return int|null
+     */
+    public function getTotalResponseTime()
+    {
+        return $this->totalResponseTime;
+    }
+
+    public function setTotalResponseTime($totalResponseTime)
+    {
+        $this->totalResponseTime = $totalResponseTime;
+    }
+
     public function decodeJson()
     {
         return JsonFile::parseJson($this->body, $this->request['url']);