Adrien Maret Aschen

V8 Promise Benchmarks

EDIT: 2021-01-10
Fixed here: nodejs/node#34291

EDIT: 2020-07-10
Explanation here: nodejs/node#33384 (comment)

By benchmarking promises against different version of Node.js, I noticed a performance drop in traditional promises (then/catch) between Node.js 10 and Node.js 12.

Kuzzle Geofencing precision

I have created a geofencing area around the Ram Manohar Lohia Hospital in New Delhi by using geojson.io.

I added two point, one inside and the other one outside the hospital but very close to geofencing zone limit (~2m).

Then I use Kuzzle realtime engine to subscribe to notification about document entering or exiting the Hospital geofencing area.

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

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

	const contextStore = new Map();
	contextStore.set('requestId', uuid());

	asyncLocalStorage.run(contextStore, async () => {
	// entering asynchronous context
	});

	const CHARSET = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';

	function uniqueId (size) {
	let id = '';

	for (let idx = size; idx--;) {
	id += CHARSET[(Math.random() * CHARSET.length \| 0)];
	}

	return id;

	class KuzzlePlugin {


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

	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}`

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

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

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

	/**
	$ 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;