How "expensive" is crypto anyway?

The text discusses the performance and cost of cryptography in real-world TLS deployments. It mentions that BoringSSL consumes only 1.8% of CPU time for processing different cipher suites, with GCM using less CPU time than CBC. Public key algorithms such as ECDHE (P256 and x25519) and RSA are also discussed, highlighting the expense of RSA operations compared to ECDSA. The text concludes that modern crypto is fast and efficient, but the future remains uncertain with the advent of quantum computers.