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In practice when this wasn't a Chinese adware service, it proved to be faster to use the CDN. You are not loading a "bunch" of polyfill script files, you selec
by tehbeard 2y ago
In practice when this wasn't a Chinese adware service, it proved to be faster to use the CDN.
You are not loading a "bunch" of polyfill script files, you selected what you needed in the URL via a query parameter, and the service took that plus user agent of the request to determine which were needed and returned a minified file of just the necessary polyfills.
As this request was to a separate domain it did not run into the head of line / max connections per domain issue of Http 1.1 which was still the more common protocol at the time this service came out.