Join us January 26th as we talk to the authors of the HTTP Archive's Web Almanac for our first Web Almanac AMA!

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  • A+

    Security score
  • A

    First Byte Time
  • A

    Keep-alive Enabled
  • B

    Compress Transfer
  • A

    Compress Images
  • F

    Cache static content
  • Effective use of CDN

Web page performance test result for
https://www.theguardian.com/business/2021/sep/24/supply-chain-crisis-tories-poised-turn-foreign-worker-visas

From: Virginia USA - EC2 - Chrome - Cable
09/24/21 17:58:39

Full Optimization Checklist

Optimization Checklist

Details

First Byte Time (back-end processing): 100/100 Learn More

238 ms First Byte Time
322 ms Target First Byte Time


Use persistent connections (keep alive): 100/100


Use gzip compression for transferring compressable responses: 88/100Learn More

1,721.4 KB total in compressible text, target size = 1,510.2 KB - potential savings = 211.2 KB

FAILED - (205.3 KB, compressed = 50.8 KB - savings of 154.6 KB) - https://ccpa-notice.sp-prod.net/Notice.0c89d.js
FAILED - (54.8 KB, compressed = 18.2 KB - savings of 36.6 KB) - https://sourcepoint.theguardian.com/ccpa.js
FAILED - (19.0 KB, compressed = 6.1 KB - savings of 12.9 KB) - https://cdn.privacy-mgmt.com/mms/v2/message?message_id=514493
FAILED - (3.6 KB, compressed = 0.9 KB - savings of 2.7 KB) - https://sourcepoint.theguardian.com/mms/v2/message_url?requestUUID=69f77862-9fad-4ab6-8869-06307e9a2bb9&account_id=1257&abp=false&href=https%3A%2F%2Fwww.theguardian.com%2Fbusiness%2F2021%2Fsep%2F24%2Fsupply-chain-crisis-tories-poised-turn-foreign-worker-visas&consentUUID=undefined&loadedData=%5B%7B%22id%22%3A%22CONSENT%3Aendpoint%3Ahttps%3A%2F%2Fsourcepoint.theguardian.com%3A7417%22%2C%22result%22%3A%22%7B%5C%22hasConsentData%5C%22%3Afalse%2C%5C%22consentedToAny%5C%22%3Afalse%2C%5C%22consentedToAll%5C%22%3Afalse%2C%5C%22rejectedAny%5C%22%3Afalse%7D%22%7D%5D&stage_campaign=false&cookie=%5B%5D&t[framework]=ccpa
FAILED - (4.1 KB, compressed = 1.6 KB - savings of 2.5 KB) - https://ccpa-notice.sp-prod.net/?message_id=514493
FAILED - (2.7 KB, compressed = 0.9 KB - savings of 1.9 KB) - https://image6.pubmatic.com/AdServer/PugMaster?sec=1&async=1&kdntuid=1&rnd=59858275&p=157206&s=0&a=0&ptask=ALL&np=0&fp=0&mpc=0&spug=1&coppa=0&gdpr=0&gdpr_consent=&us_privacy=1YNN


Compress Images: 100/100 Learn More

86.7 KB total in images, target size = 86.7 KB - potential savings = 0.0 KB


Use Progressive JPEGs: 0/100 Learn More

Info (0.1 KB) - https://tps.doubleverify.com/visit.jpg?ctx=10741356&cmp=1074264199&sid=94641&plc=1076852995&adsrv=115&btreg=&btadsrv=&crt=&tagtype=&dvtagver=6.1.img&


Leverage browser caching of static assets: 43/100 Learn More

FAILED - (No max-age or expires) - https://static.guim.co.uk/images/favicon-32x32.ico
FAILED - (No max-age or expires) - https://assets.guim.co.uk/polyfill.io/v3/polyfill.min.js?rum=0&features=es6,es7,es2017,es2018,es2019,default-3.6,HTMLPictureElement,IntersectionObserver,IntersectionObserverEntry,URLSearchParams,fetch,NodeList.prototype.forEach,navigator.sendBeacon&flags=gated&callback=guardianPolyfilled&unknown=polyfill&cacheClear=1
FAILED - (No max-age or expires) - https://cdn.permutive.com/d6691a17-6fdb-4d26-85d6-b3dd27f55f08-web.js
FAILED - (No max-age or expires) - https://cdn.permutive.com/models/v2/d6691a17-6fdb-4d26-85d6-b3dd27f55f08-models.bin
FAILED - (No max-age or expires) - https://confiant-integrations.global.ssl.fastly.net/7oDgiTsq88US4rrBG0_Nxpafkrg/gpt_and_prebid/config.js
FAILED - (No max-age or expires) - https://aud.pubmatic.com/AdServer/Artemis?dpid=431&userid=FD9278F0-6B9E-463C-93E2-0EBAA6D09E05&addseg=10,33,39
FAILED - (No max-age or expires) - https://c.amazon-adsystem.com/e/dtb/bid?src=3722&u=https%3A%2F%2Fwww.theguardian.com%2Fbusiness%2F2021%2Fsep%2F24%2Fsupply-chain-crisis-tories-poised-turn-foreign-worker-visas&pid=npdMh9HVXZJ23&cb=0&ws=1366x695&v=7.69.01&t=1500&slots=%5B%7B%22sd%22%3A%220%22%2C%22s%22%3A%5B%22300x600%22%2C%22300x250%22%5D%2C%22sn%22%3A%22%2F59666047%2Ftheguardian.com%2Fbusiness%2Farticle%2Fng%22%7D%5D&gdprl=%7B%22status%22%3A%22no-cmp%22%7D&vm=%7B%22ids%22%3A%7B%22pubcommon%22%3A%224331adc9-77e9-46bc-a662-dfd39cf51e91%22%7D%7D
FAILED - (No max-age or expires) - https://cdn.privacy-mgmt.com/mms/v2/message?message_id=514493
FAILED - (No max-age or expires) - https://pixel.adsafeprotected.com/services/pub?anId=10249&slot=%7Bid:dfp-ad--top-above-nav,ss:%5B1.1,2.2,728.90,940.230,900.250,970.250,88.71%5D,p:/59666047/theguardian.com/business/article/ng,t:display%7D&wr=1366.695&sr=1920.1200&sessionId=2d6e8257-07cd-e413-91dc-af627cdc62eb&url=https%253A%252F%252Fwww.theguardian.com%252Fbusiness%252F2021%252Fsep%252F24%252Fsupply-chain-crisis-tories-poised-turn-foreign-worker-visas
FAILED - (No max-age or expires) - https://pixel.adsafeprotected.com/services/pub?anId=10249&slot=%7Bid:dfp-ad--right,ss:%5B1.1,2.2,300.250,300.274,300.600%5D,p:/59666047/theguardian.com/business/article/ng,t:display%7D&wr=1366.695&sr=1920.1200&sessionId=2d6e8257-07cd-e413-91dc-af627cdc62eb&url=https%253A%252F%252Fwww.theguardian.com%252Fbusiness%252F2021%252Fsep%252F24%252Fsupply-chain-crisis-tories-poised-turn-foreign-worker-visas
FAILED - (No max-age or expires) - https://pixel.adsafeprotected.com/services/pub?anId=10249&slot=%7Bid:dfp-ad--merchandising-high,ss:%5B1.1,2.2,88.87%5D,p:/59666047/theguardian.com/business/article/ng,t:display%7D&wr=1366.695&sr=1920.1200&sessionId=2d6e8257-07cd-e413-91dc-af627cdc62eb&url=https%253A%252F%252Fwww.theguardian.com%252Fbusiness%252F2021%252Fsep%252F24%252Fsupply-chain-crisis-tories-poised-turn-foreign-worker-visas
FAILED - (No max-age or expires) - https://pixel.adsafeprotected.com/services/pub?anId=10249&slot=%7Bid:dfp-ad--merchandising,ss:%5B1.1,2.2,88.88%5D,p:/59666047/theguardian.com/business/article/ng,t:display%7D&wr=1366.695&sr=1920.1200&sessionId=2d6e8257-07cd-e413-91dc-af627cdc62eb&url=https%253A%252F%252Fwww.theguardian.com%252Fbusiness%252F2021%252Fsep%252F24%252Fsupply-chain-crisis-tories-poised-turn-foreign-worker-visas
FAILED - (No max-age or expires) - https://pixel.adsafeprotected.com/services/pub?anId=10249&slot=%7Bid:dfp-ad--survey,ss:%5B1.1%5D,p:/59666047/theguardian.com/business/article/ng,t:display%7D&wr=1366.695&sr=1920.1200&sessionId=2d6e8257-07cd-e413-91dc-af627cdc62eb&url=https%253A%252F%252Fwww.theguardian.com%252Fbusiness%252F2021%252Fsep%252F24%252Fsupply-chain-crisis-tories-poised-turn-foreign-worker-visas
FAILED - (No max-age or expires) - https://pixel.adsafeprotected.com/services/pub?anId=10249&slot=%7Bid:dfp-ad--mostpop,ss:%5B1.1,2.2,300.250,300.274,300.600,728.90,300.197,550.310%5D,p:/59666047/theguardian.com/business/article/ng,t:display%7D&wr=1366.695&sr=1920.1200&sessionId=2d6e8257-07cd-e413-91dc-af627cdc62eb&url=https%253A%252F%252Fwww.theguardian.com%252Fbusiness%252F2021%252Fsep%252F24%252Fsupply-chain-crisis-tories-poised-turn-foreign-worker-visas
FAILED - (No max-age or expires) - https://api.permutive.com/v2.0/identify?k=359ba275-5edd-4756-84f8-21a24369ce0b
FAILED - (No max-age or expires) - https://api.permutive.com/adv/v2/segment?new-session=true&k=359ba275-5edd-4756-84f8-21a24369ce0b
FAILED - (No max-age or expires) - https://api.permutive.com/v2.0/batch/events?enrich=false&sdkp=true&k=359ba275-5edd-4756-84f8-21a24369ce0b
FAILED - (No max-age or expires) - https://c.amazon-adsystem.com/e/dtb/bid?src=3722&u=https%3A%2F%2Fwww.theguardian.com%2Fbusiness%2F2021%2Fsep%2F24%2Fsupply-chain-crisis-tories-poised-turn-foreign-worker-visas&pid=npdMh9HVXZJ23&cb=1&ws=1366x695&v=7.69.01&t=1500&slots=%5B%7B%22sd%22%3A%221%22%2C%22s%22%3A%5B%22970x250%22%2C%22728x90%22%5D%2C%22sn%22%3A%22%2F59666047%2Ftheguardian.com%2Fbusiness%2Farticle%2Fng%22%7D%5D&gdprl=%7B%22status%22%3A%22no-cmp%22%7D&vm=%7B%22ids%22%3A%7B%22pubcommon%22%3A%224331adc9-77e9-46bc-a662-dfd39cf51e91%22%7D%7D
FAILED - (No max-age or expires) - https://api.permutive.com/v2.0/watson?k=359ba275-5edd-4756-84f8-21a24369ce0b
FAILED - (No max-age or expires) - https://aud.pubmatic.com/AdServer/Artemis?dpid=388&segid=23527
FAILED - (No max-age or expires) - https://pagead2.googlesyndication.com/getconfig/sodar?sv=200&tid=gpt&tv=2021092201&st=env
FAILED - (No max-age or expires) - https://api.permutive.com/v1.0/state?fetch_unseen=true&k=359ba275-5edd-4756-84f8-21a24369ce0b
FAILED - (No max-age or expires) - https://sb.scorecardresearch.com/p?c1=3&c2=6034961&c3=1074264199&c4=1084184120&c5=1076853001&c11=TheGuardian.com&c13=&c16=mm&cj=1&rn=5694513676158358785&ax_fwd=1
FAILED - (No max-age or expires) - https://pixel.adsafeprotected.com/services/pub?anId=10249&slot=%7Bid:dfp-ad--inline1,ss:%5B1.1,2.2,300.250,300.274,620.1,620.350,550.310,300.197%5D,p:/59666047/theguardian.com/business/article/ng,t:display%7D&wr=1366.695&sr=1920.1200&sessionId=2d6e8257-07cd-e413-91dc-af627cdc62eb&url=https%253A%252F%252Fwww.theguardian.com%252Fbusiness%252F2021%252Fsep%252F24%252Fsupply-chain-crisis-tories-poised-turn-foreign-worker-visas
FAILED - (No max-age or expires) - https://thrtle.com/insync?vxii_pdid=3ef272c9-3a0b-491c-80c9-23ee73bc9b0b&vxii_pid=12&vxii_pid1=10054&vxii_rcid=184e68fe-64ff-4ff9-b553-20def93d4a84
FAILED - (No max-age or expires) - https://api.permutive.com/v2.0/batch/events?enrich=false&sdkp=true&k=359ba275-5edd-4756-84f8-21a24369ce0b
FAILED - (No max-age or expires) - https://d6691a17-6fdb-4d26-85d6-b3dd27f55f08.prmutv.co/v2.0/pxid?k=359ba275-5edd-4756-84f8-21a24369ce0b
FAILED - (No max-age or expires) - https://api.permutive.com/v2.0/geoip?include=geo&include=isp&include=ip_hash&k=359ba275-5edd-4756-84f8-21a24369ce0b
FAILED - (No max-age or expires) - https://contributions.guardianapis.com/banner
FAILED - (No max-age or expires) - https://ccpa-notice.sp-prod.net/Notice.185fb.css
FAILED - (No max-age or expires) - https://ccpa-notice.sp-prod.net/polyfills.d36c5.js
FAILED - (No max-age or expires) - https://ccpa-notice.sp-prod.net/Notice.0c89d.js
FAILED - (No max-age or expires) - https://contributions.guardianapis.com/header
FAILED - (No max-age or expires) - https://sb.scorecardresearch.com/internal-cs/default/beacon.js
FAILED - (No max-age or expires) - https://contributions.guardianapis.com/epic
FAILED - (No max-age or expires) - https://p.adsymptotic.com/d/px/?_pid=16218&_psign=0aa5badf92527f7732e22463d6fa4dbc&coopa=0&gdpr=0&gdpr_consent=&_puuid=a105fc4d-e019-47b8-a3b5-a30ec6d294f8&_noobservation=1&_expected_cookie=3a09977e18685d1455f0263527a18cd9
FAILED - (No max-age or expires) - https://sb.scorecardresearch.com/b2?c1=2&c2=6035250&cs_ucfr=1&comscorekw=Supply%20chain%20crisis%2CBrexit%2CImmigration%20and%20asylum%2CBoris%20Johnson%2CTransport%2CPolitics%2CConservatives%2CUK%20news%2CBusiness%2CEuropean%20Union%2CEurope&cs_it=b2&cv=3.8.0.210223&ns__t=1632506270099&ns_c=UTF-8&c7=https%3A%2F%2Fwww.theguardian.com%2Fbusiness%2F2021%2Fsep%2F24%2Fsupply-chain-crisis-tories-poised-turn-foreign-worker-visas&c8=Supply%20chain%20crisis%3A%20Tories%20poised%20to%20U-turn%20on%20foreign%20worker%20visas%20%7C%20Supply%20chain%20crisis%20%7C%20The%20Guardian&c9=
FAILED - (4 seconds) - https://contributions.guardianapis.com/modules/v2/header/Header.js
FAILED - (1.9 minutes) - https://c.amazon-adsystem.com/aax2/apstag.js
FAILED - (4.2 minutes) - https://contributions.guardianapis.com/modules/v2/epics/ContributionsEpic.js
FAILED - (15.0 minutes) - https://securepubads.g.doubleclick.net/tag/js/gpt.js
FAILED - (17.9 minutes) - https://cdn.brandmetrics.com/scripts/bundle/69834047.js
FAILED - (18.0 minutes) - https://cdn.brandmetrics.com/survey/script/e96d04c832084488a841a06b49b8fb2d.js
FAILED - (22.4 minutes) - https://secure.insightexpressai.com/adserver/cookiesync?CookieSyncPartnerId=1&CookieSyncId=59b9112fc47aacc9e845db77111d35d79bf69118c6c7f1962b8fff4890e4dbc38c502a3982aeb6d1&tag=img
FAILED - (22.4 minutes) - https://secure.insightexpressai.com/adserver/cookiesync?CookieSyncPartnerId=1&CookieSyncId=59b9112fc47aacc9e845db77111d35d79bf69118c6c7f1962b8fff4890e4dbc38c502a3982aeb6d1&tag=img
FAILED - (35.9 minutes) - https://sourcepoint.theguardian.com/ccpa.js
FAILED - (50.0 minutes) - https://www.googletagservices.com/activeview/js/current/osd.js
FAILED - (50.0 minutes) - https://www.googletagservices.com/activeview/js/current/rx_lidar.js?cache=r20110914
FAILED - (50.0 minutes) - https://www.googletagservices.com/activeview/js/current/rx_lidar.js?cache=r20110914
FAILED - (50.0 minutes) - https://tpc.googlesyndication.com/sodar/sodar2.js
WARNING - (60.0 minutes) - https://www.googleadservices.com/pagead/conversion_async.js
WARNING - (60.0 minutes) - https://clipcentric-a.akamaihd.net/ad/B=254/F=1254650/C=260573/P=21842/A=22588/L=304042/S=XWxVoEfS/ad.js?q=1630696535
WARNING - (60.0 minutes) - https://securepubads.g.doubleclick.net/pagead/ppub_config?ippd=www.theguardian.com
WARNING - (1.3 hours) - https://www.google-analytics.com/analytics.js
WARNING - (4.3 hours) - https://c.amazon-adsystem.com/bao-csm/aps-comm/aps_csm.js
WARNING - (5.0 hours) - https://c.amazon-adsystem.com/cdn/prod/config?src=3722&u=https%3A%2F%2Fwww.theguardian.com%2Fbusiness%2F2021%2Fsep%2F24%2Fsupply-chain-crisis-tories-poised-turn-foreign-worker-visas
WARNING - (13.8 hours) - https://interactive.guim.co.uk/libs/iframe-messenger/iframeMessenger.js
WARNING - (2.0 days) - https://cdn.adsafeprotected.com/iasPET.1.js


Use a CDN for all static assets: 89/100

FAILED - https://aud.pubmatic.com/AdServer/Artemis?dpid=388&segid=23527
FAILED - https://aud.pubmatic.com/AdServer/Artemis?dpid=431&userid=FD9278F0-6B9E-463C-93E2-0EBAA6D09E05&addseg=10,33,39
FAILED - https://pixel.adsafeprotected.com/services/pub?anId=10249&slot=%7Bid:dfp-ad--inline1,ss:%5B1.1,2.2,300.250,300.274,620.1,620.350,550.310,300.197%5D,p:/59666047/theguardian.com/business/article/ng,t:display%7D&wr=1366.695&sr=1920.1200&sessionId=2d6e8257-07cd-e413-91dc-af627cdc62eb&url=https%253A%252F%252Fwww.theguardian.com%252Fbusiness%252F2021%252Fsep%252F24%252Fsupply-chain-crisis-tories-poised-turn-foreign-worker-visas
FAILED - https://pixel.adsafeprotected.com/services/pub?anId=10249&slot=%7Bid:dfp-ad--top-above-nav,ss:%5B1.1,2.2,728.90,940.230,900.250,970.250,88.71%5D,p:/59666047/theguardian.com/business/article/ng,t:display%7D&wr=1366.695&sr=1920.1200&sessionId=2d6e8257-07cd-e413-91dc-af627cdc62eb&url=https%253A%252F%252Fwww.theguardian.com%252Fbusiness%252F2021%252Fsep%252F24%252Fsupply-chain-crisis-tories-poised-turn-foreign-worker-visas
FAILED - https://pixel.adsafeprotected.com/services/pub?anId=10249&slot=%7Bid:dfp-ad--right,ss:%5B1.1,2.2,300.250,300.274,300.600%5D,p:/59666047/theguardian.com/business/article/ng,t:display%7D&wr=1366.695&sr=1920.1200&sessionId=2d6e8257-07cd-e413-91dc-af627cdc62eb&url=https%253A%252F%252Fwww.theguardian.com%252Fbusiness%252F2021%252Fsep%252F24%252Fsupply-chain-crisis-tories-poised-turn-foreign-worker-visas
FAILED - https://pixel.adsafeprotected.com/services/pub?anId=10249&slot=%7Bid:dfp-ad--merchandising-high,ss:%5B1.1,2.2,88.87%5D,p:/59666047/theguardian.com/business/article/ng,t:display%7D&wr=1366.695&sr=1920.1200&sessionId=2d6e8257-07cd-e413-91dc-af627cdc62eb&url=https%253A%252F%252Fwww.theguardian.com%252Fbusiness%252F2021%252Fsep%252F24%252Fsupply-chain-crisis-tories-poised-turn-foreign-worker-visas
FAILED - https://pixel.adsafeprotected.com/services/pub?anId=10249&slot=%7Bid:dfp-ad--merchandising,ss:%5B1.1,2.2,88.88%5D,p:/59666047/theguardian.com/business/article/ng,t:display%7D&wr=1366.695&sr=1920.1200&sessionId=2d6e8257-07cd-e413-91dc-af627cdc62eb&url=https%253A%252F%252Fwww.theguardian.com%252Fbusiness%252F2021%252Fsep%252F24%252Fsupply-chain-crisis-tories-poised-turn-foreign-worker-visas
FAILED - https://pixel.adsafeprotected.com/services/pub?anId=10249&slot=%7Bid:dfp-ad--survey,ss:%5B1.1%5D,p:/59666047/theguardian.com/business/article/ng,t:display%7D&wr=1366.695&sr=1920.1200&sessionId=2d6e8257-07cd-e413-91dc-af627cdc62eb&url=https%253A%252F%252Fwww.theguardian.com%252Fbusiness%252F2021%252Fsep%252F24%252Fsupply-chain-crisis-tories-poised-turn-foreign-worker-visas
FAILED - https://pixel.adsafeprotected.com/services/pub?anId=10249&slot=%7Bid:dfp-ad--mostpop,ss:%5B1.1,2.2,300.250,300.274,300.600,728.90,300.197,550.310%5D,p:/59666047/theguardian.com/business/article/ng,t:display%7D&wr=1366.695&sr=1920.1200&sessionId=2d6e8257-07cd-e413-91dc-af627cdc62eb&url=https%253A%252F%252Fwww.theguardian.com%252Fbusiness%252F2021%252Fsep%252F24%252Fsupply-chain-crisis-tories-poised-turn-foreign-worker-visas
FAILED - https://static.adsafeprotected.com/main.gr.19.8.245.js
FAILED - https://static.adsafeprotected.com/main.gr.19.8.245.js
FAILED - https://static.adsafeprotected.com/sca.17.5.12.js
FAILED - https://static.adsafeprotected.com/sca.17.5.12.js
FAILED - https://thrtle.com/insync?vxii_pdid=3ef272c9-3a0b-491c-80c9-23ee73bc9b0b&vxii_pid=12&vxii_pid1=10054&vxii_rcid=184e68fe-64ff-4ff9-b553-20def93d4a84
FAILED - https://www.googleadservices.com/pagead/conversion_async.js

CDN's Used:
www.theguardian.com :
i.guim.co.uk : Fastly
assets.guim.co.uk : Fastly
interactive.guim.co.uk : Fastly
confiant-integrations.global.ssl.fastly.net : Fastly
sourcepoint.theguardian.com : Amazon CloudFront, Fastly
static.guim.co.uk : Fastly
ccpa-notice.sp-prod.net : Amazon CloudFront
static.ads-twitter.com : Fastly
securepubads.g.doubleclick.net : Google
www.google-analytics.com : Google
contributions.guardianapis.com : Fastly
www.facebook.com : Facebook
cdn.permutive.com : Cloudflare
cdn.brandmetrics.com : Cloudflare
sb.scorecardresearch.com : Amazon CloudFront
cdn.adsafeprotected.com : Amazon CloudFront
c.amazon-adsystem.com : Amazon CloudFront
analytics.twitter.com : Twitter
t.co : Twitter
googleads.g.doubleclick.net : Google
stats.g.doubleclick.net : Google
collector.brandmetrics.com :
api.permutive.com : Google
ib.adnxs.com :
cdn.privacy-mgmt.com : Amazon CloudFront
d6691a17-6fdb-4d26-85d6-b3dd27f55f08.prmutv.co : Google
www.google.com : Google
hb-api.omnitagjs.com :
htlb.casalemedia.com : Akamai
tlx.3lift.com :
sofia.trustx.org : Google
apex.go.sonobi.com :
pubads.g.doubleclick.net : Google
adservice.google.com : Google
47688d23d26c6beb69a68b7718b1fed4.safeframe.googlesyndication.com : Google
s.amazon-adsystem.com :
www.googletagservices.com : Google
pagead2.googlesyndication.com : Google
tpc.googlesyndication.com : Google
bs.serving-sys.com :
ads.pubmatic.com : Akamai
clipcentric-a.akamaihd.net : Akamai
pixel.adsafeprotected.com :
secure-ds.serving-sys.com : Akamai
tr.clipcentric.com :
tps.doubleverify.com :
secure.insightexpressai.com : Akamai
dt.adsafeprotected.com :
js-sec.indexww.com : Akamai
image6.pubmatic.com :
eb2.3lift.com :
simage2.pubmatic.com :
sync.go.sonobi.com :
pixel.onaudience.com :
cm.g.doubleclick.net : Google
dis.criteo.com :
pr-bh.ybp.yahoo.com :
match.deepintent.com :
ssum-sec.casalemedia.com : Akamai
sync-tm.everesttech.net : Fastly
rtb.adentifi.com :
aa.agkn.com :
c.bing.com : Microsoft Azure
image4.pubmatic.com :
api.intentiq.com : Amazon CloudFront
image2.pubmatic.com :
simage4.pubmatic.com :
pmp.mxptint.net :
p.adsymptotic.com : Cloudflare
rtb.gumgum.com :
trc.taboola.com : Fastly
s.tribalfusion.com : Cloudflare





Glossary:

First Byte Time Applicable Objects Time to First Byte for the page (back-end processing + redirects)
What is checked The target time is the time needed for the DNS, socket and SSL negotiations + 100ms. A single letter grade will be deducted for every 100ms beyond the target.
Keep-Alive Applicable Objects All objects that are from a domain that serves more than one object for the page (i.e. if only a single object is served from a given domain it will not be checked)
What is checked The response header contains a "keep-alive" directive or the same socket was used for more than one object from the given host
GZIP Text Applicable Objects All objects with a mime type of "text/*" or "*javascript*"
What is checked Transfer-encoding is checked to see if it is gzip. If it is not then the file is compressed and the percentage of compression is the result (so a page that can save 30% of the size of it's text by compressing would yield a 70% test result)
Compress Images Applicable Objects JPEG Images
What is checked Within 10% of a photoshop quality 50 will pass, up to 50% larger will warn and anything larger than that will fail.
The overall score is the percentage of image bytes that can be saved by re-compressing the images.
Use Progressive JPEGs Applicable Objects All JPEG Images
What is checked Each JPEG image is checked and the resulting score is the percentage of JPEG bytes that were served as progressive images relative to the total JPEG bytes.
Cache Static Applicable Objects Any non-html object with a mime type of "text/*", "*javascript*" or "image/*" that does not explicitly have an Expires header of 0 or -1, a cache-control header of "private", "no-store" or "no-cache" or a pragma header of "no-cache"
What is checked An "Expires" header is present (and is not 0 or -1) or a "cache-control: max-age" directive is present and set for an hour or greater. If the expiration is set for less 7 days you will get a warning. If the expiration is set for less than 1 hour you will get a failure. This only applies to max-age currently.
Use A CDN Applicable Objects All static non-html content (css, js and images)
What is checked Checked to see if it is hosted on a known CDN (CNAME mapped to a known CDN network). 80% of the static resources need to be served from a CDN for the overall page to be considered using a CDN. The current list of known CDN's is here