Index: class-http.php
===================================================================
--- class-http.php	(revision 35744)
+++ class-http.php	(working copy)
@@ -900,7 +900,7 @@
 	 */
 	public function request($url, $args = array()) {
 		$defaults = array(
-			'method' => 'GET', 'timeout' => 5,
+			'method' => 'GET', 'timeout' => 5, 'usleep' => 0,
 			'redirection' => 5, 'httpversion' => '1.0',
 			'blocking' => true,
 			'headers' => array(), 'body' => null, 'cookies' => array()
@@ -1077,6 +1077,7 @@
 		fwrite($handle, $strHeaders);
 
 		if ( ! $r['blocking'] ) {
+			usleep( $r['usleep'] );
 			stream_set_blocking( $handle, 0 );
 			fclose( $handle );
 			return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() );