Hello @user1949! We are extremely happy that you joined our Community! Welcome 
I’m terribly sorry that Google Reviews widget affects your website’s speed. However, the good news is that we have a way of improving the performance.
You are very welcome to reinstall your widget by using some kind of lazy loading. In this topic, you can find more information about this workaround
To make it work, you need to add a data-elfsight-app-lazy attribute to the widget installation code. Here’s what the installation code will look like:
<script src="https://apps.elfsight.com/p/platform.js" defer></script>
<div class="elfsight-app-**WIDGET_ID** " data-elfsight-app-lazy></div>
Please replace WIDGET_ID in the code above with the ID of your own widget and install it on your website.
Please check it and let me know if it helped 