When proxying network IO, there's not much that the language is doing. The burden is more on the OS. However, the comparison is not fair because what you are d

When proxying network IO, there's not much that the language is doing. The burden is more on the OS. However, the comparison is not fair because what you are doing is just passing data in and out while haproxy is running a scheduler to maintain timeouts, logging, checking acl rules on connection establishment, maintaining stats, etc..