Each 1-second delay means:

11% fewer page views
16% decrease in customer satisfaction
7% loss in conversions

ROI

Amazon: Increased revenues by 1% for every 100ms of improvement
Yahoo: Increased traffic by 9% for every 400ms of improvement
Mozilla: Dropped page load time by 2.2 seconds and saw 60 MILLION more downloads/year

Smaller sized objects

Less http requests

Optimized rendering path

Before

Static HTML site on Cloudflare
Average of 23.9 seconds to load
~ 15mb page weight
170 resources loaded

2,549 hours/year of waiting

4.837 TB/year

$368,640/year in end-user bandwidth

Results

WordPress site on WP Engine

The Overview

Practical Tips

In Depth

Spring Cleaning!

Got rid of everything we could

2600 lines of HTML

8 js files

5 css files

Refactor

Async/Defer

Mobile first

@media (min-width: 700px){}
@media (min-width: 900px){}
@media (min-width: 1100px){}
							

@media (max-width: 700px){}
@media (max-width: 1100px){}
							

SVG

Washington



							

Compress images

Image compressors

event trigger images

CSS Sprites

WP Host

WP Engine
Pantheon
Pagely

Cheap Host?
Use a Caching plugin

WP Rocket
WP Super Cache
W3 Total Cache

CDN

Cloudflare
Max CDN
Rackspace

Never Ending Battle