valyala/fasthttp

It presents a rapid HTTP server as well as a client API. Fast HTTP is introduced as an alternative to net/HTTTP because of the optimization. It is optimized for speed and can simultaneously interact with more than 100k queries per second and more than 1 Million concurrent keep-alive connections on modern hardware. Fast HTTP has low memory usage, with easy ‘Connection Upgrade’ support via RequestCtx.Hijack. The Client supports automatic retry on idempotent requests’ failure.