83 lines
1.9 KiB
JavaScript
83 lines
1.9 KiB
JavaScript
const prettyHrtime = require('pretty-hrtime');
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// leak example from https://auth0.com/blog/four-types-of-leaks-in-your-javascript-code-and-how-to-get-rid-of-them/
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let theLeak = null;
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let anotherLeak = [];
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const fibonacci = (num) => {
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if (num <= 1) return 1;
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return fibonacci(num - 1) + fibonacci(num - 2);
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};
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module.exports = (server) => {
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server.route({
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method: 'GET',
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path: '/mem-slow',
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config: {
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handler: (req, reply) => {
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console.log('got /mem-slow request');
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const start = process.hrtime();
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const length = (anotherLeak.length || 1);
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anotherLeak.push({
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longStr: Array.from({
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length: length * 50
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}, (v, i) => i)
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});
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console.log('mem-slow prev length', length);
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console.log('mem-slow new length', anotherLeak[length - 1].longStr.length);
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const end = process.hrtime(start);
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reply(prettyHrtime(end));
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console.log('sent /mem-slow response');
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}
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}
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});
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server.route({
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method: 'GET',
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path: '/mem-fast',
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config: {
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handler: (req, reply) => {
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console.log('got /mem-fast request');
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const start = process.hrtime();
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const length = (((theLeak || {}).longStr || '').length || 1);
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theLeak = {
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longStr: Array.from({
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length: length + 500
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}, (v, i) => i)
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};
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console.log('mem-fast %d', theLeak.longStr.length);
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const end = process.hrtime(start);
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reply(prettyHrtime(end));
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console.log('sent /mem-fast response');
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}
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}
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});
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server.route({
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method: 'GET',
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path: '/cpu',
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config: {
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handler: (req, reply) => {
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console.log('got /cpu request');
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const start = process.hrtime();
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fibonacci(40);
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const end = process.hrtime(start);
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reply(prettyHrtime(end));
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console.log('sent /cpu response');
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}
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}
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});
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}; |