hcodes

window.onerror = function(msg, file, line, col, err) {
    if (!window.JSON) {
        return;
    }

    var counterId = 12345,
        siteInfo = {},
        pointer = siteInfo;
        path = [
            'JS errors',

acdha

(function ($) {
    'use strict';

    /* Based on https://github.com/wikimedia/mediawiki-extensions-NavigationTiming/ */

    function recordTimeToFirstPaint() {
        // Use Chrome's loadTimes or IE 9+'s msFirstPaint to record the time to render in milliseconds:
        var firstPaintTime, timingSource;

        if ('chrome' in window && $.isFunction(window.chrome.loadTimes)) {

rauschma

/**
 * Returns the global object.
 * Works even inside ES6 modules.
 */
function getGlobalObject() {
    // Workers don’t have `window`, only `self`
    if (typeof self !== 'undefined') {
        return self;
    }
    if (typeof global !== 'undefined') {

trevnorris

Introduction

Here is a collection of tips and tricks I've picked up about doing performance analysis on Node. Included is a build script that should get a base install of Ubuntu fully functional and ready for all the things we'll be going through.

The script pulls a lot of code from the latest master of each repository. So it's possible that something may fail, but to date I haven't had any issues.

First, go ahead and run the script. Then go take a nice long break. It'll

totherik

Per https://code.google.com/p/v8/codesearch#v8/trunk/src/runtime.cc


%CreateSymbol
%CreatePrivateSymbol
%CreateGlobalPrivateSymbol
%NewSymbolWrapper
%SymbolDescription
%SymbolRegistry
%SymbolIsPrivate

trevnorris

The prep-script.sh will setup the latest Node and install the latest perf version on your Linux box.

When you want to generate the flame graph, run the following (folder locations taken from install script):

sudo sysctl kernel.kptr_restrict=0
# May also have to do the following:
# (additional reading http://unix.stackexchange.com/questions/14227/do-i-need-root-admin-permissions-to-run-userspace-perf-tool-perf-events-ar )
sudo sysctl kernel.perf_event_paranoid=0

denji

Moved to git-repository: https://github.com/denji/awesome-http-benchmark

Tools

Located in alphabetical order (not prefer)

• ab – slow and single threaded, written in C
• apib – most of the features of ApacheBench (ab), also designed as a more modern replacement, written in C
• autocannon – fast HTTP/1.1 benchmarking tool written in Node.js
• baloo – Expressive end-to-end HTTP API testing made easy, written in Go (golang)

marcelom

#!/usr/bin/env python

## Tiny Syslog Server in Python.
##
## This is a tiny syslog server that is able to receive UDP based syslog
## entries on a specified port and save them to a file.
## That's it... it does nothing else...
## There are a few configuration parameters.

LOG_FILE = 'youlogfile.log'

MohamedAlaa

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

jaydson

var myConfObj = {
  iframeMouseOver : false
}
window.addEventListener('blur',function(){
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    console.log('Wow! Iframe Click!');
  }
});

document.getElementById('YOUR_CONTAINER_ID').addEventListener('mouseover',function(){