Update README.md

Co-authored-by: rodric rabbah <rodric@gmail.com>

Author: sciabarracom

README.md

@@ -432,7 +432,7 @@ requirements.txt
 
 Then zip your action and deploy to OpenWhisk, the requirements will be installed for you at init time, creating a suitable virtualenv.
 
-However, since resolving requirements involves downloading software from Internet, it can be pretty slow.
+Keep in mind that resolving requirements involves downloading and install software, so your action timeout limit may need to be adjusted accordingly. Instead, you should consider using precompilation to resolve the requirements at build time.
 
 Very likely your action using a `requirements.txt` will timeout at init time.