“Change almost never fails because it's too early.

It almost always fails because it's too late.” ― Seth Godin

1953 2013Formula 1 Pit Stops

https://www.youtube.com/watch?v=RRy_73ivcms

67s 3s

$

€¢

£¥

$

€ ¢

£

¥

Speed SellsRevenue

Cash FlowInvest

IT budget

Salary

What is theWebPerf

Business Case?

Every 1s faster = 2% higher conversion

2.2s faster = 15% higher download

conversion

DOMContentLoaded

Parsing of the document is finished, the Document Object Model is ready, but referenced style sheets, images, and subframes may not be finished loading.

navigationStart

unloadEventStart

unloadEventEnd

redirectStart

redirectEnd

fetchStart

domainLookupStart

domainLookupEnd

connectStart

connectEnd

secureConnectionStart

requestStart

responseStart

responseEnd

domLoading

domInteractive

domComplete

loadEventStart

loadEventEnd

domContentLoadedEventStart

domContentLoadedEventEndAFT TimeToFirst X

Do you know your business success metrics?

LoB

Marketing

Dev

Ops

load time

4.3sBounce Rate

38%

load time

# of

pag

e vi

ews

Bounce Rate

load time

# of

pag

e vi

ews

Bounce Rate

“An artist's job is to show people what was always there but they never noticed.”

-Andrew Hamilton