mitmproxy keeps all requests in memory, so that you can browse them quickly. If you want better performance, you can just swap "mitmproxy [args]" with "mitmdump

mitmproxy keeps all requests in memory, so that you can browse them quickly. If you want better performance, you can just swap "mitmproxy [args]" with "mitmdump [args]" and get all features in a headless mode which scales well and keeps a low constant memory profile.