Add crc32 benchmarks to README.md

Author: zlstringham

README.md

@@ -2,6 +2,24 @@
 
 Unofficial C libraries for working with [BYOND](http://byond.com) data.
 
+## Benchmarks
+
+### 2018 MacBook Pro, 2.2 GHz 6-Core Intel Core i7
+
+#### crc32
+
+```
+----------------------------------------------------------------------------------------
+Benchmark                              Time             CPU   Iterations UserCounters...
+----------------------------------------------------------------------------------------
+baseline/1000                       1.99 us         1.99 us       340179 bytes_per_second=480.356M/s
+baseline/1000000                    1997 us         1997 us          346 bytes_per_second=477.661M/s
+baseline/1000000000              2080410 us      2078082 us            1 bytes_per_second=458.92M/s
+byond_crc32_update/1000            0.075 us        0.075 us      8197105 bytes_per_second=12.4825G/s
+byond_crc32_update/1000000          50.7 us         50.6 us        14836 bytes_per_second=18.397G/s
+byond_crc32_update/1000000000      88869 us        88651 us            6 bytes_per_second=10.5055G/s
+````
+
 ## License
 
 Licensed under either of