noamr

(function() {
    let pending_loaf_entries = [];
    let pending_event_entries = [];
    let timeout_handle = null;
    const combined_map = new Map();

    function print() {
        const entries = [...combined_map.entries()].sort((a, b) => b.duration - a.duration);
        console.log(entries.map(([loaf, event]) => {
            let longest_script = null;

kevlened

/*
 *
 * This is currently a WIP
 * Source originally pulled 3/28/2018
 * https://www.google-analytics.com/analytics.js
 *  
 * Tools:
 *   1) Google Chrome source formatter
 *   2) VS Code right-click rename symbol
 * 

paulirish

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

• elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent