swalkinshaw

Moved to Shopify/graphql-design-tutorial

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

eddiejaoude

Src Reference: http://bernaerts.dyndns.org/download/ubuntu/install-mozilla-addon Article: http://bernaerts.dyndns.org/linux/74-ubuntu/271-ubuntu-firefox-thunderbird-addon-commandline

Firebug & YSlow headless

Headless with Xvfb in Ubuntu

sudo apt-get install xvfb
sudo Xvfb :99.0 -ac
export DISPLAY=:99.0