diff --git a/README.md b/README.md
index 7e21bc1..66847d9 100644
--- a/README.md
+++ b/README.md
@@ -34,10 +34,5 @@ make PREFIX=/usr install # overwrites existing udev libraries if any
 TODO
 ----
 
-* [ ] speed up udev_enumerate_scan_devices()
-  - [x] threads
-  - [ ] [readfile()](https://lwn.net/Articles/813827/)
-  - [ ] deferred plugging via udev_monitor_receive_device()
-  - [ ] ~~caching~~ impossible to implement
+* [x] speed up udev_enumerate_scan_devices()
 * [ ] implement hotplugging support
-* [x] remove [dirty hack](https://github.com/illiliti/libudev-zero/blob/e76f9b282442505bd6b0b08b411679aae1581fa5/udev_device.c#L383). use ioctl()