Usage and performance

The public instance of the polyfill service is hosted by the Financial Times, with the generous support of Fastly, who provide CDN distribution. View Fastly network map

Usage stats cannot be shown, probably because you need to configure the environment variables needed to get data from the Fastly and Pingdom APIs. The specific error thrown by the service is shown below:

Service: fastly
Error:   Fastly environment vars not set