Update README.md

Author: Danny-Driscoll

packages/optimizely-sdk/README.md

@@ -32,7 +32,7 @@ npm install --save @optimizely/optimizely-sdk
 ### Usage
 See the Optimizely X Full Stack [developer documentation](http://developers.optimizely.com/server/reference/index.html) to learn how to set up your first JavaScript project and use the SDK.
 
-The package's entry point is a CommonJS module, which can be used directly in environments which support it (e.g., Node.js, or loaded in a browser via Browserify or RequireJS). Additionally, you can include a standalone bundle of the SDK in your web page by fetching it from [unpkg](https://unpkg.com/):
+The package's entry point is a CommonJS module, which can be used directly in environments which support it (e.g., Node.js, or loaded in a browser via Browserify or RequireJS). Additionally, for ease of use during initial evaluations you can include a standalone bundle of the SDK in your web page by fetching it from [unpkg](https://unpkg.com/):
 
 ```html
 <script src="https://unpkg.com/@optimizely/optimizely-sdk/dist/optimizely.browser.umd.min.js"></script>
@@ -41,7 +41,7 @@ The package's entry point is a CommonJS module, which can be used directly in en
 <script src="https://unpkg.com/@optimizely/optimizely-sdk/dist/optimizely.browser.umd.js"></script>
 ```
 
-When evaluated, that bundle assigns the SDK's exports to `window.optimizelySdk`. If you wish to use the asset locally (for example, if unpkg is down), you can find it in your local copy of the package at dist/optimizely.browser.umd.min.js.
+When evaluated, that bundle assigns the SDK's exports to `window.optimizelySdk`. If you wish to use the asset locally (for example, if unpkg is down), you can find it in your local copy of the package at dist/optimizely.browser.umd.min.js. We do not recommend using this method in production settings as it introduces a third-party performance dependency.
 
 Regarding `EventDispatcher`s: In Node.js and browser environments, the default `EventDispatcher` is powered by the [`http/s`](https://nodejs.org/api/http.html) modules and by [`XMLHttpRequest`](https://developer.mozilla.org/en-US/docs/Web/API/XMLHttpRequest#Browser_compatibility), respectively. In all other environments, you must supply your own `EventDispatcher`.