Michael Jaser meaku

Passing values

Problem: Promises resolve only with a single value. If you want to pass on the result of PromiseCall1 to PromiseCall2, you have different options:

Nesting

You can nest a .then() for Promise Call 2 and return both value from the scope.

Nesting makes it harder to read and should be avoided

Setup

Example

Prerequisites

Stackvis
FlameGraph (cloned to ~/tools/FlameGraph)

Record perf data

perf record -i -g -e cycles:u -- node --perf-basic-prof app.js

generate some load!

Try certain keys

ssh-add -R #deletes all loaded keys

add-add ~/.ssh/myKey #add the desired key

git clone ...  #see what happens

	"use strict";

	var util = require("util");
	var Writable = require("stream").Writable;

	var model = require("../db/dynamodb");

	/**
	* Log Stream
	*

	"use strict";

	var request = require("request");

	function fetchKeys(userName) {

	return new Promise(function (resolve, reject) {
	request(`https://github.com/${userName}.keys`, function (err, res, body) {
	if (err) {
	reject(err);

	#!/usr/bin/env node

	"use strict";

	console.log("checking for auto responses");

	var fs = require("fs"),
	exec = require("child_process").exec;

	var input = "";

	# enable basic auth for dev systems
	SetEnvIfNoCase Host dev\.host\.com passreq

	AuthType Basic
	AuthName "Testing"
	AuthUserFile htuser
	Require valid-user

	Order deny,allow
	Deny from env=passreq

	# HTTP(S) Stuff
	# Redirect all users except IE 5-8 & Android < 4 to HTTPS
	RewriteCond %{SERVER_PORT} !^443$
	RewriteCond %{HTTP_USER_AGENT} !MSIE\ [5-8]
	RewriteCond %{HTTP_USER_AGENT} !Android.*(Mobile)?\ [0-3]
	RewriteRule (.*) https://%{HTTP_HOST}/$1 [L]

	//knoten.js Netzdiener-Beispiel in DEUTSCHskript
	var Http = FordereAn('http');

	Http.ErstelleDiener(Funktion (Anf, Ant) {
	Ant.SchreibeKopf(200, { "Inhalts-Art" : "text/blank"});
	Ant.Beenden("Hallo Welt \n");
	}).höre(1337, "LokalerGastgeber");