Workers bindings compression when publishing

So the docs state that:

A Workers script plus any Asset Bindings can be up to 1MB in size after compression.

What compression is being used? Gzip? Brotli?

Quite sure it’s Gzip, Wrangler client will show you the resulting size.

To get a feeling of the compression, my actual script size after minifying and scrambling, is 766kb.
The size after Gzipping is 173kb.