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For loop with var vs let

Using a var instead of a let in a for loop was a game changer with Node.js 6 but now it's merely the same performances.

for (var i = 0; i < 10000; i++) {
  // ...
}

for (let i = 0; i < 10000; i++) {

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npm i benchmark

results

simple function call x 962,129 ops/sec ±2.62% (79 runs sampled)
object function call x 900,959 ops/sec ±2.13% (89 runs sampled)
Fastest is simple function call

Around 0.1 ms for 1000 calls

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Immutability has a cost, here is how much

object - vanilla immutable x 903,841 ops/sec ±5.33% (77 runs sampled)
object - immutable.js    x 1,672,774 ops/sec ±1.68% (89 runs sampled)
object - mutable       x 546,235,424 ops/sec ±0.84% (83 runs sampled)

array - vanilla immutable x 4,855,761 ops/sec ±1.55% (91 runs sampled)
array - immutable.js        x 618,146 ops/sec ±3.56% (85 runs sampled)
array - mutable x 9,849,954 ops/sec ±4.00% (85 runs sampled)

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const {Benchmark} = require('benchmark');
var suite = new Benchmark.Suite;

const justClone = require('just-clone');
const fastClone = require('fast-clone');
const lodashClone = require('lodash').cloneDeep;
const stringifyParse = o => JSON.parse(JSON.stringify(o));

const smallObject = {
  name: 'Aschen',

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Migrate Elasticsearch stored scripts

This is a standalone migration script to export and imports Elasticsearch Stored Scripts.

Usage

Export scripts from your ES cluster:

node migrate.js export http://localhost:9200

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/**
$ node node/reflect.js
Reflect x 3,102,490 ops/sec ±5.31% (78 runs sampled)
Normal x 61,204,978 ops/sec ±5.73% (86 runs sampled)
Fastest is Normal
*/

const {Benchmark} = require('benchmark');
var suite = new Benchmark.Suite;

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const {Benchmark} = require('benchmark');
var suite = new Benchmark.Suite;

function monomorphic (person) {
  const array = [];

  for (let i = 10; i--; ) {
    array.push(person.age * i);
  }

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Usage:

• redis-cli --eval clean-keys.lua <mode> <days>
• redis-cli --eval clean-keys.lua count 1
• redis-cli --eval clean-keys.lua print 1
• redis-cli --eval clean-keys.lua delete 1

For example, redis-cli --eval clean-keys.lua count 2 will return the number of keys expiring in more than 2 days

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app.controller.register('redirect', {
  actions: {
    proxy: {
      handler: async request => {
        const { css, js, img, fonts } = request.input.args;

        let url;
        let contentType;
        if (css) {
          url = `http://console.kuzzle.io/css/${css}`

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class KuzzlePlugin {
 
  
  init (config, context) {
    this.pipes = {
      'index:afterList': 'restrictIndexes',
      'collection:afterList': 'restrictCollections'
    };
  }