# Benchmarks A simple benchmark of Simple-Web-Server and a few similar web libraries. Details: * Linux distribution: Debian Testing (2019-07-29) * Linux kernel: 4.19.0-1-amd64 * CPU: Intel(R) Core(TM) i7-2600 CPU @ 3.40GHz * CPU cores: 4 * The HTTP load generator [httperf](https://github.com/httperf/httperf) is used to create the benchmark results, with the following arguments: ```sh httperf --server=localhost --port=3000 --uri=/ --num-conns=20000 --num-calls=200 ``` The response messages were made identical. ## Express [Express](https://expressjs.com/) is a popular Node.js web framework. Versions: * Node: v10.15.2 * Express: 4.17.1 Code: ```js const express = require('express'); const app = express(); app.get('/', (req, res) => { res.removeHeader('X-Powered-By'); res.removeHeader('Connection'); res.end('Hello World!') }); const port = 3000; app.listen(port, () => console.log(`Example app listening on port ${port}!`)); ``` Execution: ```sh NODE_ENV=production node index.js ``` Example results (13659.7 req/s): ```sh httperf --client=0/1 --server=localhost --port=3000 --uri=/ --send-buffer=4096 --recv-buffer=16384 --num-conns=20000 --num-calls=200 httperf: warning: open file limit > FD_SETSIZE; limiting max. # of open files to FD_SETSIZE Maximum connect burst length: 1 Total: connections 20000 requests 40000 replies 20000 test-duration 2.928 s Connection rate: 6829.9 conn/s (0.1 ms/conn, <=1 concurrent connections) Connection time [ms]: min 0.1 avg 0.1 max 14.8 median 0.5 stddev 0.1 Connection time [ms]: connect 0.0 Connection length [replies/conn]: 1.000 Request rate: 13659.7 req/s (0.1 ms/req) Request size [B]: 62.0 Reply rate [replies/s]: min 0.0 avg 0.0 max 0.0 stddev 0.0 (0 samples) Reply time [ms]: response 0.1 transfer 0.0 Reply size [B]: header 76.0 content 12.0 footer 0.0 (total 88.0) Reply status: 1xx=0 2xx=20000 3xx=0 4xx=0 5xx=0 CPU time [s]: user 0.66 system 2.27 (user 22.4% system 77.5% total 99.9%) Net I/O: 1414.0 KB/s (11.6*10^6 bps) Errors: total 20000 client-timo 0 socket-timo 0 connrefused 0 connreset 20000 Errors: fd-unavail 0 addrunavail 0 ftab-full 0 other 0 ``` ## Hyper [Hyper](https://hyper.rs/) is a Rust HTTP library that topped the [TechEmpower Web Framework Benchmarks results](https://www.techempower.com/benchmarks/#section=data-r18&hw=ph&test=plaintext) in 2019-07-09. Versions: * rustc: 1.38.0-nightly * hyper: 0.12 Code (copied from https://github.com/hyperium/hyper/blob/0.12.x/examples/hello.rs, but removed `pretty_env_logger` calls due to compilation issues): ```rust #![deny(warnings)] extern crate hyper; // extern crate pretty_env_logger; use hyper::{Body, Request, Response, Server}; use hyper::service::service_fn_ok; use hyper::rt::{self, Future}; fn main() { // pretty_env_logger::init(); let addr = ([127, 0, 0, 1], 3000).into(); let server = Server::bind(&addr) .serve(|| { // This is the `Service` that will handle the connection. // `service_fn_ok` is a helper to convert a function that // returns a Response into a `Service`. service_fn_ok(move |_: Request| { Response::new(Body::from("Hello World!")) }) }) .map_err(|e| eprintln!("server error: {}", e)); println!("Listening on http://{}", addr); rt::run(server); } ``` Compilation and run: ```sh cargo run --release ``` Example results (60712.3 req/s): ```sh httperf --client=0/1 --server=localhost --port=3000 --uri=/ --send-buffer=4096 --recv-buffer=16384 --num-conns=20000 --num-calls=200 httperf: warning: open file limit > FD_SETSIZE; limiting max. # of open files to FD_SETSIZE Maximum connect burst length: 1 Total: connections 20000 requests 4000000 replies 4000000 test-duration 65.884 s Connection rate: 303.6 conn/s (3.3 ms/conn, <=1 concurrent connections) Connection time [ms]: min 3.0 avg 3.3 max 11.3 median 3.5 stddev 0.3 Connection time [ms]: connect 0.0 Connection length [replies/conn]: 200.000 Request rate: 60712.3 req/s (0.0 ms/req) Request size [B]: 62.0 Reply rate [replies/s]: min 58704.0 avg 60732.7 max 62587.7 stddev 1021.7 (13 samples) Reply time [ms]: response 0.0 transfer 0.0 Reply size [B]: header 76.0 content 12.0 footer 0.0 (total 88.0) Reply status: 1xx=0 2xx=4000000 3xx=0 4xx=0 5xx=0 CPU time [s]: user 15.91 system 49.97 (user 24.1% system 75.8% total 100.0%) Net I/O: 8893.4 KB/s (72.9*10^6 bps) Errors: total 0 client-timo 0 socket-timo 0 connrefused 0 connreset 0 Errors: fd-unavail 0 addrunavail 0 ftab-full 0 other 0 ``` ## Simple-Web-Server In these simplistic tests, the performance of Simple-Web-Server is similar to the Hyper Rust HTTP library, although Hyper seems to be slightly faster more often than not. Versions: * g++: 9.1.0 Code (modified `http_examples.cpp`): ```c++ #include "server_http.hpp" using HttpServer = SimpleWeb::Server; int main() { HttpServer server; server.config.port = 3000; server.default_resource["GET"] = [](std::shared_ptr response, std::shared_ptr /*request*/) { response->write("Hello World!", {{"Date", SimpleWeb::Date::to_string(std::chrono::system_clock::now())}}); }; server.start(); } ``` Build, compilation and run: ```sh mkdir build && cd build CXX=g++-9 CXXFLAGS="-O2 -DNDEBUG -flto" cmake .. make ./http_examples ``` Example results (60596.3 req/s): ```sh httperf --client=0/1 --server=localhost --port=3000 --uri=/ --send-buffer=4096 --recv-buffer=16384 --num-conns=20000 --num-calls=200 httperf: warning: open file limit > FD_SETSIZE; limiting max. # of open files to FD_SETSIZE Maximum connect burst length: 1 Total: connections 20000 requests 4000000 replies 4000000 test-duration 66.011 s Connection rate: 303.0 conn/s (3.3 ms/conn, <=1 concurrent connections) Connection time [ms]: min 3.2 avg 3.3 max 8.0 median 3.5 stddev 0.0 Connection time [ms]: connect 0.0 Connection length [replies/conn]: 200.000 Request rate: 60596.3 req/s (0.0 ms/req) Request size [B]: 62.0 Reply rate [replies/s]: min 60399.6 avg 60596.9 max 60803.8 stddev 130.9 (13 samples) Reply time [ms]: response 0.0 transfer 0.0 Reply size [B]: header 76.0 content 12.0 footer 0.0 (total 88.0) Reply status: 1xx=0 2xx=4000000 3xx=0 4xx=0 5xx=0 CPU time [s]: user 16.07 system 49.93 (user 24.3% system 75.6% total 100.0%) Net I/O: 8876.4 KB/s (72.7*10^6 bps) Errors: total 0 client-timo 0 socket-timo 0 connrefused 0 connreset 0 Errors: fd-unavail 0 addrunavail 0 ftab-full 0 other 0 ```