@jusenpai/timer/index.js

A lightweight library capable of measuring how much time a callback requires to execute.

/**
 * Times a function call
 * @param {function} callback - the callback to be timed
 * @param {*} args - the args to be passed to the callback
 * @return {Promise<{time: number, value: any}>}
 */
const timer = (callback, ...args) => {
    const start = new Date().getTime();
    const value = callback && callback(...args);

    return Promise.resolve(value).then(res => {
        const stop = new Date().getTime();
        return {
            value: res,
            time: stop - start,
        };
    });
};

module.exports = timer;