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LDNWebPerf Special - Tim Kadlec & Ilya Grigorik

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Perry D.



Click here to register and purchase ticket (


Talk 1: Mobile image processing

Skill Level:



Loading images isn’t as simple as you think. We often discuss image weight and download time, but mobile devices deal with many other challenges, such as decode times in underpowered CPUs, limited CPU/GPU transfers, and memory consumption. In this talk we’ll explain those limitations, their impact, and how you can best handle them on your own site.


Tim Kadlec @tkadlec

Tim Kadlec is a developer advocate pushing for a faster web at Akamai. He is the author of Implementing Responsive Design: Building Sites for an Anywhere, Everywhere Web ( (New Riders, 2012), and was a contributing author for Smashing Book #4: New Perspectives on Web Design ( and Web Performance Daybook Volume 2 ( (O’Reilly, 2012).

Along with Katie Kovalcin, Tim co-hosts The Path to Performance Podcast ( He writes sporadically at (


Talk 2: Webperf API's to quantify and improve real world RAIL

Skill Level:

Intermediate / Advanced


Delivering a smooth experience requires paying close attention to Response (<100ms), Animation (<16ms), Idle (the more, the better), and Load (<1000ms). In this talk we'll take a fast-paced tour of both new and upcoming webperf API's to help us "stay on the performance RAILs".


Ilya Grigorik @igrigorik

Ilya Grigorik is a web performance engineer at Google, co-chair of the W3C Web Performance Working group, and author of High Performance Browser Networking (O'Reilly) book.



What time should I arrive?

• Entry to the meetup is from 18:15 to 18:45. The Registration desk is located in the main lobby/reception of the M&S building . Security will escort arrivals in groups to the conference suite.

• The meetup will end at 22:00 and all attendees must exit the building by 22:30.

Why have you started charging for your meetup events?

• We are charging a nominal £5 entry for our meetup events primarily to reduce the very high level 'no shows' that we have had in the past. This is very frustrating for those that really want to go but end up not being able to attend as all the spots have been taken.The 'waitlist' concept relies on 'no shows' actually releasing their space, and we find that this just doesn't happen. 'No shows' also cause difficulties for us in terms of food and drink provision and event checkin/security.

• The entry fee's are used towards the general operation of the group. As we are a non-profit making community association, any annual surplus from both sponsorship and attendance fees will be donated to IT related charities.

Do I have to bring my printed ticket to the event?

• Yes - It really helps us if you can bring your Eventbrite paper or online ticket (containing the QR code) to the checkin desk at the event.

What is the refund policy?

• In the event of the event being cancelled by the organisers, then a full refund will be made. No other refunds will be made under any circumstances. You can transfer you ticket to someone else via Eventbrite.

The name on the registration/ticket doesn't match the attendee. Is that okay?

• As we are using corporate facilities to host the meetup, security will perform a name check at check-in so its much easier if for everyone if you purchase your ticket in the correct name.

Are there ID requirements or an age limit to enter the event?

• ID will be required if you are not the named ticket holder. Our group sponsors provide alcholic drinks during the meetup session so you have to be over 18 to benefit from those.

Click here to register and purchase ticket (

Waterside House, 35 North Wharf Road, London, W2 1NW · London
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