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| 'use strict';
|
| const assert = require('assert');
| const MAP = Symbol('Timing#map');
| const LIST = Symbol('Timing#list');
|
|
| class Timing {
|
| constructor() {
| this[MAP] = new Map();
| this[LIST] = [];
| }
|
| start(name) {
| if (!name) return;
|
| if (this[MAP].has(name)) this.end(name);
|
| const start = Date.now();
| const item = {
| name,
| start,
| end: undefined,
| duration: undefined,
| pid: process.pid,
| index: this[LIST].length,
| };
| this[MAP].set(name, item);
| this[LIST].push(item);
| return item;
| }
|
| end(name) {
| if (!name) return;
| assert(this[MAP].has(name), `should run timing.start('${name}') first`);
|
| const item = this[MAP].get(name);
| item.end = Date.now();
| item.duration = item.end - item.start;
| return item;
| }
|
| toJSON() {
| return this[LIST];
| }
| }
|
| module.exports = Timing;
|
|
