Lebedev Konstantin RubaXa

О сжатии на протокольном уровне (http)

Актулизировано на момент 03.12.2018 Док несколько потерял в актуальности, см презентацию https://docs.google.com/presentation/d/1bw0ypsrdyC2l35Z-h65D09ABQDSZ_Ecfp02-zE6Fmqc Если кратко то brotli 0 в 4 раза быстрее чем gzip 1, при том же сжатии И brotli 4 столь же быстр как gzip 1 на круче чем gzip 9

Обозреваемые форматы сжатия:

gzip 1 - минимальный уровень сжатия gzip, результат .gz
gzip 9 - максимальный уровень сжатия gzip, результат .gz
zopfli - отдельный алгоритм совместимый с распаковщиком gzip, результат .gz

Scaling your API with rate limiters

The following are examples of the four types rate limiters discussed in the accompanying blog post. In the examples below I've used pseudocode-like Ruby, so if you're unfamiliar with Ruby you should be able to easily translate this approach to other languages. Complete examples in Ruby are also provided later in this gist.

In most cases you'll want all these examples to be classes, but I've used simple functions here to keep the code samples brief.

Request rate limiter

This uses a basic token bucket algorithm and relies on the fact that Redis scripts execute atomically. No other operations can run between fetching the count and writing the new count.

	// Slightly modified version of: https://github.com/es-shims/RegExp.escape/blob/main/test/tests.js

	import test from 'node:test';
	import assert from 'node:assert/strict';
	import {regExpEscape as escape} from './regexp-escape.mjs';

	const forEach = (arrayLike, callback) => Array.prototype.forEach.call(arrayLike, callback);
	const inspect = String;

	test('strings', function (st) {

	// 1. var
	var name = 'name';
	var i, length;
	var j = 0;

	// 2. var
	var name = 'name';
	var i;
	var j = 0;
	var length;

	/**
	* Микро обертка для выполенения XHR-запросов
	* @namepace window.xhr
	* @example
	* xhr.load('/path/to', {type: 'POST'}, function (err, xhr) {
	* // ...
	* });
	*/
	(function (global) {
	'use strict';

	var _hasOwn = Object.prototype.hasOwnProperty;
	var _toString = Object.prototype.toString;
	var _hasGOPD = typeof Object.getOwnPropertyDescriptor === 'function';
	var _hasDP = typeof Object.defineProperty === 'function';

	function _getOwnPropertyDescriptor(obj, prop) {
	if ( _hasGOPD ) {
	return Object.getOwnPropertyDescriptor(obj, prop)
	}
	else {

	/**
	* User Timing polyfill (http://www.w3.org/TR/user-timing/)
	* @author RubaXa <[email protected]>
	*/
	(function (window){
	var
	startOffset = Date.now ? Date.now() : +(new Date)
	, performance = window.performance \|\| {}

	, _entries = []

	/**
	* @author RubaXa <[email protected]>
	* @license MIT
	*/
	(function () {
	"use strict";


	function _then(promise, method, callback) {
	return function () {

	$ = jQuery

	queues = {}
	running = false

	queue = (name) ->
	name = 'default' if name is true
	queues[name] or= []

	next = (name) ->

	/**
	* jQuery extension, add support `scrollstart` and `scrollend` events.
	*
	* @author RubaXa <[email protected]>
	* @github https://gist.github.com/RubaXa/5568964
	* @license MIT
	*
	*
	* @settings
	* $.special.scrollend.delay = 300; // default ms