* Some webservers "cheat" and skip a lot of request headers which one may want to use in a production scenario to get better numbers.
* Some web server architectures can do very well on many small uniformly sized requests but poorly on a mixture of request sizes.
* Some web server architectures can get very good average latency but poor p99 latency.
* Some benchmarking tools don't measure correctly: https://medium.com/@siddontang/the-coordinated-omission-prob...
etc.