Author here. There's a benchmark table further down the post, the numbers come from this repo if you want to run them yourself: https://github.com/bschaatsbergen/go-tpm-tls-bench

Thats the “what it costs” section? Im a bit impressed if they are down to ~3ms per handshake. When I last looked at TPM signing (many years ago) it was more like single digit transactions per second.

That said, even 3ms TPM signatures are going to be for special cases or novelty. Plain old CPU tls will do about 1ms cpu time per request which will scale by cpu core count. One or two orders of magnitude more throughput per host.