| /** |
| * @fileoverview Tracks performance of individual rules. |
| * @author Brandon Mills |
| */ |
| |
| "use strict"; |
| |
| //------------------------------------------------------------------------------ |
| // Helpers |
| //------------------------------------------------------------------------------ |
| |
| /* istanbul ignore next */ |
| /** |
| * Align the string to left |
| * @param {string} str string to evaluate |
| * @param {int} len length of the string |
| * @param {string} ch delimiter character |
| * @returns {string} modified string |
| * @private |
| */ |
| function alignLeft(str, len, ch) { |
| return str + new Array(len - str.length + 1).join(ch || " "); |
| } |
| |
| /* istanbul ignore next */ |
| /** |
| * Align the string to right |
| * @param {string} str string to evaluate |
| * @param {int} len length of the string |
| * @param {string} ch delimiter character |
| * @returns {string} modified string |
| * @private |
| */ |
| function alignRight(str, len, ch) { |
| return new Array(len - str.length + 1).join(ch || " ") + str; |
| } |
| |
| //------------------------------------------------------------------------------ |
| // Module definition |
| //------------------------------------------------------------------------------ |
| |
| const enabled = !!process.env.TIMING; |
| |
| const HEADERS = ["Rule", "Time (ms)", "Relative"]; |
| const ALIGN = [alignLeft, alignRight, alignRight]; |
| |
| /* istanbul ignore next */ |
| /** |
| * display the data |
| * @param {Object} data Data object to be displayed |
| * @returns {void} prints modified string with console.log |
| * @private |
| */ |
| function display(data) { |
| let total = 0; |
| const rows = Object.keys(data) |
| .map(key => { |
| const time = data[key]; |
| |
| total += time; |
| return [key, time]; |
| }) |
| .sort((a, b) => b[1] - a[1]) |
| .slice(0, 10); |
| |
| rows.forEach(row => { |
| row.push(`${(row[1] * 100 / total).toFixed(1)}%`); |
| row[1] = row[1].toFixed(3); |
| }); |
| |
| rows.unshift(HEADERS); |
| |
| const widths = []; |
| |
| rows.forEach(row => { |
| const len = row.length; |
| |
| for (let i = 0; i < len; i++) { |
| const n = row[i].length; |
| |
| if (!widths[i] || n > widths[i]) { |
| widths[i] = n; |
| } |
| } |
| }); |
| |
| const table = rows.map(row => ( |
| row |
| .map((cell, index) => ALIGN[index](cell, widths[index])) |
| .join(" | ") |
| )); |
| |
| table.splice(1, 0, widths.map((width, index) => { |
| const extraAlignment = index !== 0 && index !== widths.length - 1 ? 2 : 1; |
| |
| return ALIGN[index](":", width + extraAlignment, "-"); |
| }).join("|")); |
| |
| console.log(table.join("\n")); // eslint-disable-line no-console |
| } |
| |
| /* istanbul ignore next */ |
| module.exports = (function() { |
| |
| const data = Object.create(null); |
| |
| /** |
| * Time the run |
| * @param {*} key key from the data object |
| * @param {Function} fn function to be called |
| * @returns {Function} function to be executed |
| * @private |
| */ |
| function time(key, fn) { |
| if (typeof data[key] === "undefined") { |
| data[key] = 0; |
| } |
| |
| return function(...args) { |
| let t = process.hrtime(); |
| |
| fn(...args); |
| t = process.hrtime(t); |
| data[key] += t[0] * 1e3 + t[1] / 1e6; |
| }; |
| } |
| |
| if (enabled) { |
| process.on("exit", () => { |
| display(data); |
| }); |
| } |
| |
| return { |
| time, |
| enabled |
| }; |
| |
| }()); |