A simple command-line tool for javascript performance testing, inspired by Golang benchmarking.

# install
$ npm install -g @knockkkjs/jsben

# test loop.js
$ jsben loop.js

loop.js:

function BenchmarkLoop() {
  for (let i = 0; i < 100000000; i++) {}
}

"jsben" will perform performance testing on every function in the file that starts with "benchmark" (case-insensitive).

output:

os:  darwin
node version:  v16.16.0
BenchmarkLoop 20 32.6ms/op

The BenchmarkLoop function was executed a total of 20 times, with an average duration of 32.6 milliseconds per run.

// test.js
function BenchmarkExample() {
  for (let i = 0; i < 100000000; i++) {}
}

$ jsben test.js
os:  darwin
node version:  v16.16.0
BenchmarkExample 20 32.4ms/op

"jsben" also supports asynchronous functions.

// test.js
const sleep = (time) => new Promise((resolve) => setTimeout(resolve, time));

async function BenchmarkAsyncExample() {
  await sleep(100);
}

$ jsben test.js
os:  darwin
node version:  v16.16.0
BenchmarkAsyncExample 9 101ms/op