readme updated

README.md

@@ -42,18 +42,26 @@ or you can:
     python setup.py install
     ```
 
-### Test call
+### Usage
 
 ```python
 import numpy as np
 import numbits
 a = np.array([0, 1, 2, 3, 4, 5, 6, 7, 8], dtype='uint8')
-b = numbits.unpack(a, nbits=2)
+b = numbits.unpack(a, nbits=2, bitorder="big", parallel=False)
 
 >>> array([0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 2, 0, 0, 0, 3, 0, 0, 1, 0, 0, 0,
            1, 1, 0, 0, 1, 2, 0, 0, 1, 3, 0, 0, 2, 0], dtype=uint8)
 ```
 
+### Benchmarks
+|           |           |
+| --------- | --------- |
+| ![](tests/benchmarks/benchmark_unpack_1bit_little.png) | ![](tests/benchmarks/benchmark_unpack_1bit_big.png) |
+| ![](tests/benchmarks/benchmark_pack_1bit_little.png) | ![](tests/benchmarks/benchmark_pack_1bit_big.png) |
+
+
+
 [tests]: https://github.com/telegraphic/numbits/actions/workflows/tests.yaml/badge.svg
 [pybind]: https://github.com/pybind/pybind11
 [sigpyproc]: https://github.com/FRBs/sigpyproc3