update RAEDME.md to describe the first-time slowness
diff --git a/README.md b/README.md
index e899cf8..886d47a 100644
--- a/README.md
+++ b/README.md
@@ -50,6 +50,8 @@
Creating action trampoline
```
+The first time you launch this, you will experience a small delay, as the debugger pulls in the NodeJS package dependencies supported by OpenWhisk. This will allow you to debug actions that require one or more of the NodeJS [packages supported by OpenWhisk](https://dev-console.stage1.ng.bluemix.net/docs/openwhisk/openwhisk_reference.html#openwhisk_ref_javascript).
+
### Getting Help
The short-hand for this is `-a`. To learn more about the options for each command, you can issue a `-h` request, e.g.
