asos.com ASOS | Shop the Latest Clothes and Fashion Online

Mobile Usability

100/100

Good

Mobile Speed

45/100

Bad

Last tested: 2017-08-27

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asos.com Mobile Speed: 45/100
asos.com Mobile Speed Test Quick Overview

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

Your page has 15 blocking script resources and 2 blocking CSS resources. This causes a delay in rendering your page.
http://assets.asosservices.com/MasterLayout/Src/MasterLayout/Libs/nRelic.js
https://assets.asosservices.com/MasterLayout/Javas…yout/core.0.4.3.min.js
https://assets.asosservices.com/asos-ui/FeaturesStoreControl.js
https://assets.asosservices.com/identity/widgets/standalone/sdk.1.0.1.js
https://assets.asosservices.com/MasterLayout/Javas…asterLayout.Sdk.min.js
http://prodassets.asosservices.com/Store/Src/Libs/jquery-1.11.1.min.js
https://ci.asosservices.com/core/core.min.js
http://cdn.tt.omtrdc.net/cdn/target.js
http://asoscomltd.tt.omtrdc.net/m2/asoscomltd/mbox…ferrer=&mboxVersion=57
http://creativeassets.asosservices.com/js/cx-nrelic.js
http://resources.asosservices.com/res/analytics/homepage.js
http://assets.asosservices.com/MasterLayout/Javasc…ntroller.Mobile.min.js
http://assets.asosservices.com/MasterLayout/Javasc…out/Resources/en-GB.js
http://ci.asosservices.com/core/analytics.mobile.min.js
http://assets.asosservices.com/lpsa/js/mu/mu-bundl…undle-1.0.144.0.min.js
Optimize CSS Delivery of the following:
http://assets.asosservices.com/MasterLayout/Styles…ayoutBundle.Mobile.css
http://assets.asosservices.com/lpsa/css/mu/mu-bund…p-bundle-1.0.144.0.css
Avoid landing page redirects

Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.
Avoid landing page redirects for the following chain of redirected URLs.
http://asos.com/
http://www.asos.com/
http://m.asos.com/
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:
http://ad.sxp.smartclip.net/img/trpx.gif (expiration not specified)
http://cotads.adscale.de/ads/pixel/1by1.png (expiration not specified)
http://load.s3.amazonaws.com/pixel.gif (expiration not specified)
http://admaym.com/UserMatch.ashx?bidderid=45&bidde…4200-882f-37573b52e8d8 (1 second)
https://assets.asosservices.com/asos-ui/FeaturesStoreControl.js (35 seconds)
http://s.btstatic.com/tag.js (15 minutes)
https://connect.facebook.net/en_US/fbevents.js (20 minutes)
https://connect.facebook.net/signals/config/753968184693755?v=2.7.6 (20 minutes)
https://connect.facebook.net/signals/plugins/identity.js?v=2.7.6 (20 minutes)
http://assets.asosservices.com/MasterLayout/Javasc…ntroller.Mobile.min.js (60 minutes)
http://assets.asosservices.com/MasterLayout/Javasc…out/Resources/en-GB.js (60 minutes)
http://assets.asosservices.com/MasterLayout/Src/MasterLayout/Libs/nRelic.js (60 minutes)
http://assets.asosservices.com/MasterLayout/Styles…ayoutBundle.Mobile.css (60 minutes)
http://assets.asosservices.com/MasterLayout/images…wdownblack_small_o.png (60 minutes)
http://assets.asosservices.com/MasterLayout/images/mobile/flags/gb.png (60 minutes)
http://assets.asosservices.com/MasterLayout/images…/header_sprite_new.png (60 minutes)
http://assets.asosservices.com/MasterLayout/images…e/logo_small_o_new.png (60 minutes)
http://assets.asosservices.com/MasterLayout/images/mobile/nav-loading.gif (60 minutes)
http://assets.asosservices.com/lpsa/css/mu/mu-bund…p-bundle-1.0.144.0.css (60 minutes)
http://assets.asosservices.com/lpsa/js/mu/mu-bundl…undle-1.0.144.0.min.js (60 minutes)
http://cdn.tt.omtrdc.net/cdn/target.js (60 minutes)
http://ci.asosservices.com/core/analytics.mobile.min.js (60 minutes)
http://creativeassets.asosservices.com/js/cx-nrelic.js (60 minutes)
http://mathid.mathtag.com/d/i.js (60 minutes)
http://mobile.asosservices.com/web/sitecatalyst/mo…ytics_v201612071705.js (60 minutes)
http://prodassets.asosservices.com/Store/Src/Libs/jquery-1.11.1.min.js (60 minutes)
http://resources.asosservices.com/res/analytics/homepage.js (60 minutes)
https://assets.asosservices.com/MasterLayout/Javas…asterLayout.Sdk.min.js (60 minutes)
https://assets.asosservices.com/MasterLayout/Javas…yout/core.0.4.3.min.js (60 minutes)
https://assets.asosservices.com/identity/widgets/standalone/sdk.1.0.1.js (60 minutes)
https://ci.asosservices.com/core/core.min.js (60 minutes)
http://www.google-analytics.com/analytics.js (2 hours)
https://js-agent.newrelic.com/nr-spa-998.min.js (2 hours)
Prioritize visible content

Your page requires additional network round trips to render the above-the-fold content. For best performance, reduce the amount of HTML needed to render above-the-fold content.
The entire HTML response was not sufficient to render the above-the-fold content. This usually indicates that additional resources, loaded after HTML parsing, were required to render above-the-fold content. Prioritize visible content that is needed for rendering above-the-fold by including it directly in the HTML response.
Only about 9% of the final above-the-fold content could be rendered with the full HTML response.
Optimize images

Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 48.6KiB (57% reduction).
Compressing http://content.asos-media.com/-/media/homepages/un…richomepage-mobile.jpg could save 33KiB (49% reduction).
Compressing http://assets.asosservices.com/MasterLayout/images…wdownblack_small_o.png could save 14.9KiB (95% reduction).
Compressing http://contextual.media.net/cksync.php?cs=3&type=m…4200-882f-37573b52e8d8 could save 744B (91% reduction).
Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.
Minify JavaScript for the following resources to reduce their size by 26.7KiB (40% reduction).
Minifying https://assets.asosservices.com/identity/widgets/standalone/sdk.1.0.1.js could save 26.2KiB (41% reduction) after compression.
Minifying http://pixel.mathtag.com/event/js?01AD=3L9HccQy8MX…aW51eCBhcm12OGx8%22%7D could save 523B (26% reduction).
Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.
Enable compression for the following resources to reduce their transfer size by 6.1KiB (50% reduction).
Compressing https://my.asos.com/identity/.well-known/jwks?lang=en-GB&_=1494252858285 could save 1.8KiB (42% reduction).
Compressing http://pixel.mathtag.com/event/js?01AD=3L9HccQy8MX…3=&s5=US&mm_bnc&mm_bct could save 1.2KiB (56% reduction).
Compressing http://pixel.mathtag.com/event/js?01AD=3L9HccQy8MX…aW51eCBhcm12OGx8%22%7D could save 1.1KiB (53% reduction).
Compressing https://my.asos.com/identity/.well-known/openid-co…=en-GB&_=1494252858283 could save 914B (65% reduction).
Compressing https://my.asos.com/identity/connect/authorize?sta…=en-GB&_=1494252858286 could save 678B (37% reduction).
Compressing https://assets.asosservices.com/asos-ui/FeaturesStoreControl.js could save 577B (76% reduction).

asos.com Mobile Resources


Total Resources154
Number of Hosts77
Static Resources50
JavaScript Resources46
CSS Resources3

asos.com Mobile Resource Breakdown