Loading ads always has some effect on page speed. HTL BID affects page speed the same amount as a comparable in-house implementation. The functionality provided by HTL BID is the same functionality that a publisher would be implementing themself.
That said, let’s look at what the htlbid.js file actually consists of:
- Prebid.js library code
- HTLBID ad management code
- Ad slot configuration data
For the most part, page speed problems are not caused by the wrapper itself, but instead by the technologies that you specify for the wrapper to load. By opting for fewer technologies, you can expect less drag on your page speed.
The htlbid.js file loads from our Cloudfront CDN. The exact loading speed depends on your local network conditions and the network conditions of your users. Operations are performed async and the library avoids render blocking whenever possible.