diff --git a/README.md b/README.md
index 45e8768..b1f8bf0 100644
--- a/README.md
+++ b/README.md
@@ -35,5 +35,7 @@ TODO
 ----
 
 * [ ] speed up performance
+  - [x] threads
+  - [ ] deferred plugging via udev_monitor_receive_device()
 * [ ] implement hotplugging support
 * [x] remove [dirty hack](https://github.com/illiliti/libudev-zero/blob/e76f9b282442505bd6b0b08b411679aae1581fa5/udev_device.c#L383). use ioctl()