Updated FUSE Mount (markdown)

FUSE-Mount.md

@@ -179,7 +179,9 @@ Threads fairness:
 
 ```
 
-Here is the result of using tool [fio](https://github.com/axboe/fio). The write performance may seem low, because SeaweedFS choose to always commit to the remote storage first, instead of writing to local cache and claim success too early.
+Here is the result of using tool [fio](https://github.com/axboe/fio). 
+* The read performance is great because SeaweedFS FUSE asynchronously caches both metadata and file content.
+* The write performance may seem low, because SeaweedFS FUSE chooses to always commit to the remote storage first, instead of writing to local cache and claim success too early.
 
 ```
 $ fio --name=sequential-read -directory=mm --rw=read --refill_buffers --bs=4M --size=4G