ted.com TED: Ideas worth spreading

Mobile Usability

94/100

Good

Mobile Speed

63/100

Bad

Last tested: 2017-08-27

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ted.com Mobile Usability: 94/100
ted.com Mobile Usability Test Quick Overview

Size content to viewport

The page content is too wide for the viewport, forcing the user to scroll horizontally. Size the page content to the viewport to provide a better user experience.
The page content is 420 CSS pixels wide, but the viewport is only 412 CSS pixels wide. The following elements fall outside the viewport:
The element <div class="Flex-embed__ra…d__ratio--16x9"> falls outside the viewport.
The element <div class="Flex-embed__co…:c j-c:c a-i:c"> falls outside the viewport.
The element <div class="pos:a pos:c"> falls outside the viewport.
The element <div class="w:full p-x:3 p…p-x:0@sm p-b:3">A different wa…about charity</div> falls outside the viewport.
The element <div class="w:full p-x:3 p…p-x:0@sm p-b:3">Where do great…n nurture them</div> falls outside the viewport.
The element <div class="bg:white p-y:5…b-t b:black.9">About TED TE…und the world.</div> falls outside the viewport.
Size tap targets appropriately

Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.
The following tap targets are close to other nearby tap targets and may need additional spacing around them.
The tap target <button class="sb z-index--2 width-full o:0"></button> and 9 others are close to other tap targets.
The tap target <button>1</button> and 8 others are close to other tap targets.
The tap target <button>2</button> and 14 others are close to other tap targets.
The tap target <a href="/about/program…s/tedx-program" class="footer__link">TEDx</a> and 20 others are close to other tap targets.
ted.com Mobile Speed: 63/100
ted.com Mobile Speed Test Quick Overview

Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 3 blocking CSS resources. This causes a delay in rendering your page.
Optimize CSS Delivery of the following:
https://pa.tedcdn.com/stylesheets/global.css?1494278820
https://pa.tedcdn.com/stylesheets/shed.css?1494278820
https://pa.tedcdn.com/stylesheets/global.css?1494278820
Optimize images

Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 103.8KiB (39% reduction).
Compressing https://tpc.googlesyndication.com/simgad/3077296816447275503 could save 35.1KiB (68% reduction).
Compressing https://pi.tedcdn.com/r/assets.tedcdn.com/images/p…11&h=500&quality=90&w= could save 30.7KiB (36% reduction).
Compressing https://pi.tedcdn.com/r/pe.tedcdn.com/images/ted/d…11&h=500&quality=90&w= could save 29.5KiB (33% reduction).
Compressing https://pa.tedcdn.com/assets/g-2x.9da98a1c.png could save 8.5KiB (21% reduction).
Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Leverage browser caching for the following cacheable resources:
https://www.googletagservices.com/tag/js/gpt.js (15 minutes)
https://pagead2.googlesyndication.com/pagead/osd.js (60 minutes)
https://www.google-analytics.com/analytics.js (2 hours)

ted.com Mobile Resources


Total Resources99
Number of Hosts13
Static Resources81
JavaScript Resources12
CSS Resources2

ted.com Mobile Resource Breakdown