Update readme

README.md

@@ -40,7 +40,7 @@ The project is supported by Uploadcare, a SAAS for cloud-based image storing and
 
 [![Uploadcare][uploadcare.logo]][uploadcare.com]
 
-In fact, Uploadcare has been running Pillow-SIMD for about two years now.
+In fact, Uploadcare has been running Pillow-SIMD for about three years now.
 
 The following image operations are currently SIMD-accelerated:
 
@@ -48,9 +48,10 @@ The following image operations are currently SIMD-accelerated:
 - Gaussian and box blur: SSE4
 - Alpha composition: SSE4, AVX2
 - RGBA → RGBa (alpha premultiplication): SSE4, AVX2
-- RGBa → RGBA (division by alpha): AVX2
-
-See [CHANGES](CHANGES.SIMD.rst) for more information.
+- RGBa → RGBA (division by alpha): SSE4, AVX2
+— RGB → L (grayscale): SSE4
+- 3x3 and 5x5 kernel filters: SSE4, AVX2
+- Split and get_channel: SSE4
 
 
 ## Benchmarks
@@ -120,7 +121,7 @@ All bugfixes to the original Pillow will then be transferred to the next Pillow-
   [original-changelog]: https://github.com/python-pillow/Pillow/blob/master/CHANGES.rst
   [original-contribute]: https://github.com/python-pillow/Pillow/blob/master/.github/CONTRIBUTING.md
   [gaussian-blur-changes]: https://pillow.readthedocs.io/en/3.2.x/releasenotes/2.7.0.html#gaussian-blur-and-unsharp-mask
-  [pillow-perf-page]: https://python-pillow.org/pillow-perf/
+  [pillow-perf-page]: https://python-pillow.github.io/pillow-perf/
   [pillow-perf-repo]: https://github.com/python-pillow/pillow-perf
   [uploadcare.com]: https://uploadcare.com/?utm_source=github&utm_medium=description&utm_campaign=pillow-simd
   [uploadcare.logo]: https://ucarecdn.com/dc4b8363-e89f-402f-8ea8-ce606664069c/-/preview/