leak spike initial commit

spikes/leak/.gitignore

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+/node_modules
+coverage
+.nyc_output
+npm-debug.log

spikes/leak/package.json

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+{
+  "name": "leak-spike",
+  "version": "1.0.0",
+  "private": true,
+  "license": "private",
+  "main": "src/index.js",
+  "dependencies": {
+    "clone": "^2.0.0",
+    "hapi": "^15.2.0",
+    "pretty-hrtime": "^1.0.3",
+    "require-dir": "^0.3.1"
+  }
+}

spikes/leak/readme.md

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+GET /mem
+GET /cpu

spikes/leak/src/index.js

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+const requireDir = require('require-dir');
+const plugins = require('./plugins');
+const routes = requireDir('./routes');
+const Hapi = require('hapi');
+
+const server = new Hapi.Server();
+
+server.connection({
+  host: 'localhost',
+  port: 8000
+});
+
+server.register(plugins, (err) => {
+  if (err) {
+    throw err;
+  }
+
+  Object.keys(routes).forEach((name) => {
+    routes[name](server);
+  });
+
+  server.start((err) => {
+    server.connections.forEach((conn) => {
+      console.log(`started at: ${conn.info.uri}`);
+    });
+  });
+});

spikes/leak/src/plugins.js

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+module.exports = [];

spikes/leak/src/routes/leak.js

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+const prettyHrtime = require('pretty-hrtime');
+const clone = require('clone');
+
+// leak example from https://auth0.com/blog/four-types-of-leaks-in-your-javascript-code-and-how-to-get-rid-of-them/
+let theLeak = null;
+const anotherLeak = [];
+
+const fibonacci = (num) => {
+  if (num <= 1) return 1;
+
+  return fibonacci(num - 1) + fibonacci(num - 2);
+};
+
+module.exports = (server) => {
+  server.route({
+    method: 'GET',
+    path: '/mem',
+    config: {
+      handler: (req, reply) => {
+        const start = process.hrtime();
+
+        const originalLeak = theLeak;
+
+        const unused = () => {
+          // referencig something that is going to be replaced
+          if (originalLeak) {
+            console.log("hi");
+          }
+        };
+
+        theLeak = {
+          longStr: new Array(1000000).join('*')
+        };
+
+        anotherLeak.push(anotherLeak.length);
+
+        const end = process.hrtime(start);
+        reply(prettyHrtime(end));
+      }
+    }
+  });
+
+  server.route({
+    method: 'GET',
+    path: '/cpu',
+    config: {
+      handler: (req, reply) => {
+        const start = process.hrtime();
+
+        fibonacci(40);
+
+        const end = process.hrtime(start);
+        reply(prettyHrtime(end));
+      }
+    }
+  });
+};

spikes/leak/src/routes/version.js

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+const Pkg = require('../../package.json');
+
+const internals = {
+  response: {
+    version: Pkg.version
+  }
+};
+
+module.exports = (server) => {
+  server.route({
+    method: 'GET',
+    path: '/ops/version',
+    config: {
+      description: 'Returns the version of the server',
+      handler: (request, reply) => reply(internals.response)
+    }
+  });
+};