I run automated trading strategies and kept choosing exchanges based on vague "low latency" marketing claims. So I built a benchmark to actually measure it. Here is REST API latency to 9 exchanges, measured from a US-east datacenter, with the method and raw data open so you can reproduce or challenge any number.

Method

9 exchanges, measured from a US-east datacenter

50 samples each, keep-alive HTTPS GET to each exchange's public ticker endpoint

TLS handshake timed separately so it does not pollute request timing