Update README.md

README.md

@@ -17,6 +17,8 @@ This is a captioning model I made purely to make things easier and cheaper for m
 
 You're going to need ~70gb vram to run this model. The fp8 variant will require ~38gb.
 
+Note the fp8 variant is ~1.6x faster than the bf16 variant.
+
 ## Installation
 
 You need `ffmpeg`, `ffprobe`, and `unzip` available on `PATH`.