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Lighthouse Mobile

· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
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Detailed Report

Audit breakdown by category with detailed findings.

48

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
/static/generated/deutschlandfunk_kultur/main.modern.js98.0 s671.9 KiB
www.deutschlandfunkkultur.de/static/podlove-player/5.12.3/player/vendor.js99.0 s237.4 KiB
/static/generated/deutschlandfunk_kultur/player.dist.js98.0 s160.3 KiB
www.deutschlandfunkkultur.de/static/podlove-player/5.12.3/player/styles.css99.0 s158.3 KiB
/d5/05/f3/3b/d505f33b-edd6-41f1-8f93-a532c837823d/die-lie...0.0 ms143.1 KiB
/d1/8c/54/9d/d18c549d-b068-4c10-b74b-54bfb8b10767/dlfkjid...0.0 ms111.9 KiB
/31/09/0a/06/31090a06-3341-46f1-a3b8-9d493e61e177/klassik...0.0 ms111.5 KiB
/a3/af/17/3b/a3af173b-8a83-4f52-b593-fa9f4e25bf65/charlot...0.0 ms109.8 KiB
/10/6e/51/e7/106e51e7-3211-448d-8f55-e0fb9db9f3bb/russlan...0.0 ms96.2 KiB
/83/0c/7d/e7/830c7de7-6134-4837-ae41-2affaf7755b6/deep-sc...0.0 ms93.5 KiB
/NO/VA/_e/f8/NOVA_ef8899649f86461d5dbcdc5077dabd8e/craft-...0.0 ms90.7 KiB
/8c/a3/4c/bc/8ca34cbc-c31c-4c78-8551-6535abd1717d/tatort-...0.0 ms90.6 KiB
/FI/LE/_4/b3/FILE_4b39452b651303ec3eb5df9c81d45c02/nation...0.0 ms77.2 KiB
/7d/bd/b9/fc/7dbdb9fc-90b0-4dbf-9a1c-fe367d3eee79/ki-vers...0.0 ms76.3 KiB
/c6/be/a0/f0/c6bea0f0-f853-45bb-abc0-4db9c8fadc7d/der-the...0.0 ms73.8 KiB
/10/6f/4b/6a/106f4b6a-0b98-4aa8-890e-9a014923901b/der-res...0.0 ms71.0 KiB
/65/1b/a8/7c/651ba87c-00dc-4dbc-b228-d6bd00b9232e/die-pet...0.0 ms66.1 KiB
/20/a1/77/89/20a17789-17ee-4bf7-ac41-4a9ea6da0edb/amerika...0.0 ms65.5 KiB
/73/d8/83/5e/73d8835e-bc1e-4218-af6f-af18fe4e2bfc/richard...0.0 ms65.0 KiB
/93/5e/67/ca/935e67ca-64d5-4d1d-989d-eb2fe4aabdde/queen-e...0.0 ms61.2 KiB
/6c/a7/ab/38/6ca7ab38-331e-4fee-874f-ca52920fce1e/turmspr...0.0 ms58.9 KiB
/FI/LE/_6/f0/FILE_6f08bb721b1e2d72478f872c0af52e36/das-li...0.0 ms58.6 KiB
/ba/86/45/87/ba864587-52ef-4c2c-b68a-43923c7ab003/230519d...0.0 ms58.6 KiB
/FI/LE/_1/95/FILE_195aa1217d091d8b8ef3f2fe4e3f54f4/plus-e...0.0 ms57.8 KiB
/24/55/e3/c3/2455e3c3-6a84-4bb8-94c4-6e7f2d882906/dark-ag...0.0 ms57.0 KiB
/eb/27/e9/e2/eb27e9e2-3c48-4112-8449-641b8e5c4ea4/bagdad-...0.0 ms56.8 KiB
/14/83/3f/3d/14833f3d-e9c9-4652-9ee0-35198bff7ba6/stiftun...0.0 ms55.2 KiB
/33/a0/83/9c/33a0839c-ef15-4495-8775-3f651d8708b3/1001-na...0.0 ms54.5 KiB
/dc/43/3f/1b/dc433f1b-2390-464d-8971-6405530c1441/dlfklin...0.0 ms54.0 KiB
/f2/7d/99/96/f27d9996-8d3d-45de-b887-fd31302c4017/luis-pu...0.0 ms53.6 KiB
/61/1c/cb/47/611ccb47-e402-4bbb-81d7-c2f8753e352a/dragon-...0.0 ms52.5 KiB
/db/4e/3d/13/db4e3d13-8c75-4808-b09e-f3a44cb5b4c4/gabriel...0.0 ms50.1 KiB
/a7/2e/10/2e/a72e102e-f57f-4da7-a6bf-e5f8317b8932/dita-zi...0.0 ms49.2 KiB
/FI/LE/_b/d2/FILE_bd2765bc03bd4207451758ece908a872/ueber-...0.0 ms47.5 KiB
/4e/7a/18/ed/4e7a18ed-e925-40ff-8244-9718d2e4cbf1/thomas-...0.0 ms47.0 KiB
www.deutschlandfunkkultur.de/static/fonts/Graphik-Semibold-Web.woff297.0 s46.6 KiB
/72/b0/cd/e4/72b0cde4-3b04-4f00-a65f-65b2820a3278/dave-ma...0.0 ms45.6 KiB
/d8/45/31/2f/d845312f-84ed-4098-a735-80c0b4484e61/charlot...0.0 ms45.0 KiB
www.deutschlandfunkkultur.de/static/podlove-player/5.12.3/player/styles.js99.0 s45.3 KiB
www.deutschlandfunkkultur.de/static/podlove-player/embed.js98.0 s43.3 KiB
/e4/34/b6/fa/e434b6fa-4866-4287-a0cc-8b69558696e9/eurovis...0.0 ms42.1 KiB
www.deutschlandfunkkultur.de/static/generated/deutschlandfunk_kultur/styles.css97.0 s42.0 KiB
/72/c8/2a/20/72c82a20-5753-41d1-bd51-8d82dcd1d5c5/autor-k...0.0 ms39.5 KiB
/68/7e/96/97/687e9697-f708-47f3-b0d7-cc3d91b58922/patrick...0.0 ms38.5 KiB
/FI/LE/_e/c0/FILE_ec0d5763f096aa66b160efaeabbd8a25/111422...0.0 ms32.8 KiB
www.deutschlandfunkkultur.de/static/fonts/Graphik-Medium-Web.woff297.0 s33.0 KiB
www.deutschlandfunkkultur.de/static/podlove-player/5.12.3/player/bootstrap.js99.0 s32.0 KiB
www.deutschlandfunkkultur.de/static/fonts/Graphik-Regular-Web.woff297.0 s29.9 KiB
/a2/47/d7/5f/a247d75f-e603-477b-bd2c-d4af22a901d1/analoge...0.0 ms25.3 KiB
/d4/cb/41/50/d4cb4150-7dfc-484a-b4fd-bad69691e1ac/deutsch...0.0 ms23.3 KiB
/a8/6a/09/9c/a86a099c-15b5-4f85-a596-6ff768982252/vorhang...0.0 ms22.3 KiB
tag.aticdn.net/piano-analytics.js14400.0 s26.6 KiB
/static/img/audio_player/placeholder_black_512x512.png900.0 s2.7 KiB
www.deutschlandfunkkultur.de/static/podlove-player/variant-xl.js99.0 s1.3 KiB

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
Cover des Podcasts Die Lieblingsschülerin: Auf einem linierten Blatt liegen dre… a > div.b-image > div.image-wrapper > img.internal-image
/d5/05/f3/3b/d505f33b-edd6-41f1-8f93-a532c837823d/die-lie...142.8 KiB135.2 KiB
Cover des Podcasts "Jüdisch in der DDR". Über bemalten Kacheln mit Figuren ist … a > div.b-image > div.image-wrapper > img.internal-image
/d1/8c/54/9d/d18c549d-b068-4c10-b74b-54bfb8b10767/dlfkjid...111.6 KiB104.1 KiB
Der Podcast "Klassik drastisch" wird moderiert von Axel Ranisch und wechselnden… a > div.b-image > div.image-wrapper > img.internal-image
/31/09/0a/06/31090a06-3341-46f1-a3b8-9d493e61e177/klassik...111.2 KiB103.6 KiB
Unzähliche Soldaten marschieren, darüber zeigt eine große Videoleinwand Putin: … div.b-image-reference-wrapper > div.b-image > div.image-wrapper > img.internal-image
/10/6e/51/e7/106e51e7-3211-448d-8f55-e0fb9db9f3bb/russlan...95.9 KiB94.3 KiB
Charlotte Gneuß div.teaser-xl-image-wrapper > div.b-image > div.image-wrapper > img.internal-image
/a3/af/17/3b/a3af173b-8a83-4f52-b593-fa9f4e25bf65/charlot...109.4 KiB91.7 KiB
Glaspyramide des Museums Louvre in Paris div.b-image-reference-wrapper > div.b-image > div.image-wrapper > img.internal-image
/NO/VA/_e/f8/NOVA_ef8899649f86461d5dbcdc5077dabd8e/craft-...90.4 KiB88.8 KiB
Deep Science - Die Psychonauten. Die Podcast-Illustration zeigt in bunten, unna… a > div.b-image > div.image-wrapper > img.internal-image
/83/0c/7d/e7/830c7de7-6134-4837-ae41-2affaf7755b6/deep-sc...93.1 KiB85.8 KiB
Tatort Kunst: Eine Illustration des Bildes „Das Mädchen mit dem Perlenohrring“… a > div.b-image > div.image-wrapper > img.internal-image
/8c/a3/4c/bc/8ca34cbc-c31c-4c78-8551-6535abd1717d/tatort-...90.3 KiB83.2 KiB
Prager Nationalgalerie am Hradschiner Platz div.b-image-reference-wrapper > div.b-image > div.image-wrapper > img.internal-image
/FI/LE/_4/b3/FILE_4b39452b651303ec3eb5df9c81d45c02/nation...76.9 KiB75.3 KiB
Im Bild steht der Schriftzug "KI verstehen". Die Zeichnung zeigt einen stilisie… a > div.b-image > div.image-wrapper > img.internal-image
/7d/bd/b9/fc/7dbdb9fc-90b0-4dbf-9a1c-fe367d3eee79/ki-vers...76.0 KiB70.0 KiB
Der Theaterpodcast Podcast a > div.b-image > div.image-wrapper > img.internal-image
/c6/be/a0/f0/c6bea0f0-f853-45bb-abc0-4db9c8fadc7d/der-the...73.4 KiB67.7 KiB
Illustrative Grafik eines Tempels bei dem eine Säule droht umzustürzen a > div.b-image > div.image-wrapper > img.internal-image
/10/6f/4b/6a/106f4b6a-0b98-4aa8-890e-9a014923901b/der-res...70.6 KiB65.1 KiB
Peter Thiel hält sich eine Hand halb vor sein Gesicht a > div.b-image > div.image-wrapper > img.internal-image
/65/1b/a8/7c/651ba87c-00dc-4dbc-b228-d6bd00b9232e/die-pet...65.8 KiB60.6 KiB
Der Historiker Volker Depkat a > div.b-image > div.image-wrapper > img.internal-image
/20/a1/77/89/20a17789-17ee-4bf7-ac41-4a9ea6da0edb/amerika...65.2 KiB60.1 KiB
25. Krönungsjubiläum: Queen Elizabeth II. wird 1977 in London begeistert gefeie… div.b-image-reference-wrapper > div.b-image > div.image-wrapper > img.internal-image
/93/5e/67/ca/935e67ca-64d5-4d1d-989d-eb2fe4aabdde/queen-e...60.9 KiB59.3 KiB
Richard Arnold trägt Sakko und Krawatte, steht am Rathaus und schaut direkt in … div.teaser-xl-image-wrapper > div.b-image > div.image-wrapper > img.internal-image
/73/d8/83/5e/73d8835e-bc1e-4218-af6f-af18fe4e2bfc/richard...64.7 KiB54.2 KiB
Die Turmspringerinnen: Die Zeichnung zum Podcast zeigt drei Turmspringerinnen a… a > div.b-image > div.image-wrapper > img.internal-image
/6c/a7/ab/38/6ca7ab38-331e-4fee-874f-ca52920fce1e/turmspr...58.5 KiB53.9 KiB
Das Bild zeigt das Podcast-Logo der ZDF-Sendung "Das Literarische Quartett", di… a > div.b-image > div.image-wrapper > img.internal-image
/FI/LE/_6/f0/FILE_6f08bb721b1e2d72478f872c0af52e36/das-li...58.3 KiB53.7 KiB
Billion Dollar Apes - Kunst, Gier, NFTs. Ein Podcast von Deutschlandfunk Kultur… a > div.b-image > div.image-wrapper > img.internal-image
/ba/86/45/87/ba864587-52ef-4c2c-b68a-43923c7ab003/230519d...58.3 KiB53.7 KiB
Stiftung Preußischer Kulturbesitz, Schild mit Logo am Eingang der Hauptverwaltu… div.b-image-reference-wrapper > div.b-image > div.image-wrapper > img.internal-image
/14/83/3f/3d/14833f3d-e9c9-4652-9ee0-35198bff7ba6/stiftun...54.9 KiB53.3 KiB
Podcast: Plus Eins a > div.b-image > div.image-wrapper > img.internal-image
/FI/LE/_1/95/FILE_195aa1217d091d8b8ef3f2fe4e3f54f4/plus-e...57.5 KiB53.0 KiB
Das Cover zum Podcast "Dark Agent" ist die Zeichnung eines Smarthphones, dessen… a > div.b-image > div.image-wrapper > img.internal-image
/24/55/e3/c3/2455e3c3-6a84-4bb8-94c4-6e7f2d882906/dark-ag...56.7 KiB52.1 KiB
Der argentinische Filmemacher Luis Puenzo steht auf einem schwarz-weiß Foto neb… div.b-image-reference-wrapper > div.b-image > div.image-wrapper > img.internal-image
/f2/7d/99/96/f27d9996-8d3d-45de-b887-fd31302c4017/luis-pu...53.3 KiB51.8 KiB
Der Mangaheld Son Goku aus Dragon Ball von Akira Toriyama. div.b-image-reference-wrapper > div.b-image > div.image-wrapper > img.internal-image
/61/1c/cb/47/611ccb47-e402-4bbb-81d7-c2f8753e352a/dragon-...52.2 KiB50.7 KiB
Die stilisierte Grafik zeigt Schahrasad in Rückenansicht vor einem blauen Himme… a > div.b-image > div.image-wrapper > img.internal-image
/33/a0/83/9c/33a0839c-ef15-4495-8775-3f651d8708b3/1001-na...54.2 KiB49.9 KiB
Link in Bio Podcast Cover a > div.b-image > div.image-wrapper > img.internal-image
/dc/43/3f/1b/dc433f1b-2390-464d-8971-6405530c1441/dlfklin...53.6 KiB49.4 KiB
Die Autorin Gabriele von Arnim ist weißhaarig und trägt einen roten Schal. … div.b-image-reference-wrapper > div.b-image > div.image-wrapper > img.internal-image
/db/4e/3d/13/db4e3d13-8c75-4808-b09e-f3a44cb5b4c4/gabriel...49.7 KiB48.4 KiB
Die Schriftstellerin Dita Zipfel im Porträt. div.b-image-reference-wrapper > div.b-image > div.image-wrapper > img.internal-image
/a7/2e/10/2e/a72e102e-f57f-4da7-a6bf-e5f8317b8932/dita-zi...48.8 KiB47.5 KiB
Thomas Bernhard im Gespräch auf seinem Vierkanthof in Ohlsdorf (Oberösterreich) div.b-image-reference-wrapper > div.b-image > div.image-wrapper > img.internal-image
/4e/7a/18/ed/4e7a18ed-e925-40ff-8244-9718d2e4cbf1/thomas-...46.7 KiB45.4 KiB
Ein schwarz-weiß Bild des Sängers und Gitarristen Dave Mason. div.b-image-reference-wrapper > div.b-image > div.image-wrapper > img.internal-image
/72/b0/cd/e4/72b0cde4-3b04-4f00-a65f-65b2820a3278/dave-ma...45.3 KiB44.0 KiB
Montage aus einem Portrait von Charlotte Gneuß und Ingo Schulze div.b-image-reference-wrapper > div.b-image > div.image-wrapper > img.internal-image
/d8/45/31/2f/d845312f-84ed-4098-a735-80c0b4484e61/charlot...44.7 KiB43.5 KiB
Über Podcast a > div.b-image > div.image-wrapper > img.internal-image
/FI/LE/_b/d2/FILE_bd2765bc03bd4207451758ece908a872/ueber-...47.1 KiB43.4 KiB
Das Logo des Eurovision Song Contest 2026 in Wien, das V von Vision ist ein rot… div.b-image-reference-wrapper > div.b-image > div.image-wrapper > img.internal-image
/e4/34/b6/fa/e434b6fa-4866-4287-a0cc-8b69558696e9/eurovis...41.8 KiB40.6 KiB
Der algerisch-französische Schriftsteller Kamel Daoud präsentiert sich und sein… div.b-image-reference-wrapper > div.b-image > div.image-wrapper > img.internal-image
/72/c8/2a/20/72c82a20-5753-41d1-bd51-8d82dcd1d5c5/autor-k...39.2 KiB38.1 KiB
Blick auf Bagdad im Irak, historische Ansicht aus dem Jahre 1895. div.b-image-reference-wrapper > div.b-image > div.image-wrapper > img.internal-image
/eb/27/e9/e2/eb27e9e2-3c48-4112-8449-641b8e5c4ea4/bagdad-...56.5 KiB37.4 KiB
Patrick Bruel anlässlich des 200-jährigen Jubiläums von „Le Figaro“ in Paris, F… div.b-image-reference-wrapper > div.b-image > div.image-wrapper > img.internal-image
/68/7e/96/97/687e9697-f708-47f3-b0d7-cc3d91b58922/patrick...38.1 KiB37.1 KiB
Analoger Kleinbild-Filmstreifen verknotet auf gelblichen Untergrund. div.b-image-reference-wrapper > div.b-image > div.image-wrapper > img.internal-image
/a2/47/d7/5f/a247d75f-e603-477b-bd2c-d4af22a901d1/analoge...24.9 KiB24.2 KiB
Ein Stapel von acht Büchern vor weißem Hintergrund div.b-image-reference-wrapper > div.b-image > div.image-wrapper > img.internal-image
/d4/cb/41/50/d4cb4150-7dfc-484a-b4fd-bad69691e1ac/deutsch...23.0 KiB22.4 KiB
Das Foto zeigt einen geschlossenen roten Theatervorhang div.b-image-reference-wrapper > div.b-image > div.image-wrapper > img.internal-image
/a8/6a/09/9c/a86a099c-15b5-4f85-a596-6ff768982252/vorhang...22.0 KiB21.4 KiB
Brigitte und Jonathan Meese (Maler und Aktionskünstler) spiegeln sich im Ausste… div.b-image-reference-wrapper > div.b-image > div.image-wrapper > img.internal-image
/FI/LE/_e/c0/FILE_ec0d5763f096aa66b160efaeabbd8a25/111422...32.5 KiB13.3 KiB

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-4-IMG
nodeLabel: Charlotte Gneuß
path: 1,HTML,1,BODY,0,DIV,1,MAIN,0,SECTION,1,A,0,DIV,0,DIV,0,DIV,0,IMG
selector: div.teaser-xl-image-wrapper > div.b-image > div.image-wrapper > img.internal-image
snippet: <img loading="lazy" class="internal-image" alt="Charlotte Gneuß" src="https://bilder.deutschlandfunk.de/a3/af/17/3b/a3af173b-8a83-4f52-b593-fa9f…" srcset="https://bilder.deutschlandfunk.de/a3/af/17/3b/a3af173b-8a83-4f52-b593-fa9f…">

HTTP/2 and HTTP/3 offer many benefits over HTTP/1.1, such as multiplexing. Learn more about using modern HTTP.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLProtocol
/a3/af/17/3b/a3af173b-8a83-4f52-b593-fa9f4e25bf65/charlot...http/1.1
/eb/27/e9/e2/eb27e9e2-3c48-4112-8449-641b8e5c4ea4/bagdad-...http/1.1
/d8/45/31/2f/d845312f-84ed-4098-a735-80c0b4484e61/charlot...http/1.1
/d4/cb/41/50/d4cb4150-7dfc-484a-b4fd-bad69691e1ac/deutsch...http/1.1
/93/5e/67/ca/935e67ca-64d5-4d1d-989d-eb2fe4aabdde/queen-e...http/1.1
/4e/7a/18/ed/4e7a18ed-e925-40ff-8244-9718d2e4cbf1/thomas-...http/1.1
/a7/2e/10/2e/a72e102e-f57f-4da7-a6bf-e5f8317b8932/dita-zi...http/1.1
/db/4e/3d/13/db4e3d13-8c75-4808-b09e-f3a44cb5b4c4/gabriel...http/1.1
/10/6e/51/e7/106e51e7-3211-448d-8f55-e0fb9db9f3bb/russlan...http/1.1
/14/83/3f/3d/14833f3d-e9c9-4652-9ee0-35198bff7ba6/stiftun...http/1.1
/e4/34/b6/fa/e434b6fa-4866-4287-a0cc-8b69558696e9/eurovis...http/1.1
/72/c8/2a/20/72c82a20-5753-41d1-bd51-8d82dcd1d5c5/autor-k...http/1.1
/61/1c/cb/47/611ccb47-e402-4bbb-81d7-c2f8753e352a/dragon-...http/1.1
/68/7e/96/97/687e9697-f708-47f3-b0d7-cc3d91b58922/patrick...http/1.1
/72/b0/cd/e4/72b0cde4-3b04-4f00-a65f-65b2820a3278/dave-ma...http/1.1
/FI/LE/_4/b3/FILE_4b39452b651303ec3eb5df9c81d45c02/nation...http/1.1
/a8/6a/09/9c/a86a099c-15b5-4f85-a596-6ff768982252/vorhang...http/1.1
/f2/7d/99/96/f27d9996-8d3d-45de-b887-fd31302c4017/luis-pu...http/1.1
/NO/VA/_e/f8/NOVA_ef8899649f86461d5dbcdc5077dabd8e/craft-...http/1.1
/73/d8/83/5e/73d8835e-bc1e-4218-af6f-af18fe4e2bfc/richard...http/1.1
/FI/LE/_e/c0/FILE_ec0d5763f096aa66b160efaeabbd8a25/111422...http/1.1
/a2/47/d7/5f/a247d75f-e603-477b-bd2c-d4af22a901d1/analoge...http/1.1
/d5/05/f3/3b/d505f33b-edd6-41f1-8f93-a532c837823d/die-lie...http/1.1
/20/a1/77/89/20a17789-17ee-4bf7-ac41-4a9ea6da0edb/amerika...http/1.1
/8c/a3/4c/bc/8ca34cbc-c31c-4c78-8551-6535abd1717d/tatort-...http/1.1
/31/09/0a/06/31090a06-3341-46f1-a3b8-9d493e61e177/klassik...http/1.1
/c6/be/a0/f0/c6bea0f0-f853-45bb-abc0-4db9c8fadc7d/der-the...http/1.1
/FI/LE/_1/95/FILE_195aa1217d091d8b8ef3f2fe4e3f54f4/plus-e...http/1.1
/33/a0/83/9c/33a0839c-ef15-4495-8775-3f651d8708b3/1001-na...http/1.1
/10/6f/4b/6a/106f4b6a-0b98-4aa8-890e-9a014923901b/der-res...http/1.1
/FI/LE/_6/f0/FILE_6f08bb721b1e2d72478f872c0af52e36/das-li...http/1.1
/7d/bd/b9/fc/7dbdb9fc-90b0-4dbf-9a1c-fe367d3eee79/ki-vers...http/1.1
/83/0c/7d/e7/830c7de7-6134-4837-ae41-2affaf7755b6/deep-sc...http/1.1
/24/55/e3/c3/2455e3c3-6a84-4bb8-94c4-6e7f2d882906/dark-ag...http/1.1
/65/1b/a8/7c/651ba87c-00dc-4dbc-b228-d6bd00b9232e/die-pet...http/1.1
/FI/LE/_b/d2/FILE_bd2765bc03bd4207451758ece908a872/ueber-...http/1.1
/ba/86/45/87/ba864587-52ef-4c2c-b68a-43923c7ab003/230519d...http/1.1
/d1/8c/54/9d/d18c549d-b068-4c10-b74b-54bfb8b10767/dlfkjid...http/1.1
/dc/43/3f/1b/dc433f1b-2390-464d-8971-6405530c1441/dlfklin...http/1.1
/6c/a7/ab/38/6ca7ab38-331e-4fee-874f-ca52920fce1e/turmspr...http/1.1

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
value: no origins were preconnected
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates
value: No additional origins are good candidates for preconnecting

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer SizeDuration
www.deutschlandfunkkultur.de/static/generated/deutschlandfunk_kultur/styles.css42.0 KiB300 ms

Consider setting font-display to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with font metric overrides.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLEst Savings
www.deutschlandfunkkultur.de/static/fonts/Graphik-Regular-Web.woff210 ms
www.deutschlandfunkkultur.de/static/fonts/Graphik-Medium-Web.woff25.0 ms
www.deutschlandfunkkultur.de/static/fonts/Graphik-Semibold-Web.woff25.0 ms

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 798 ms
URLTime Spent
deutschlandfunkkultur.de/798 ms
www.deutschlandfunkkultur.de/0.0 ms

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Diagnostics

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 300 ms 197.1 KiB
URLTransfer SizeEst Savings
www.deutschlandfunkkultur.de/static/podlove-player/5.12.3/player/styles.css158.0 KiB158.0 KiB
www.deutschlandfunkkultur.de/static/generated/deutschlandfunk_kultur/styles.css41.7 KiB39.1 KiB

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 2.2 s 612.7 KiB
URLTransfer SizeEst Savings
/static/generated/deutschlandfunk_kultur/main.modern.js671.0 KiB313.0 KiB
www.deutschlandfunkkultur.de/static/podlove-player/5.12.3/player/vendor.js237.1 KiB146.1 KiB
/static/generated/deutschlandfunk_kultur/player.dist.js160.0 KiB120.8 KiB
www.deutschlandfunkkultur.de/static/podlove-player/5.12.3/player/styles.js44.9 KiB32.8 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTotal CPU TimeScript EvaluationScript Parse
/static/generated/deutschlandfunk_kultur/main.modern.js1.2 s1.2 s8.3 ms
www.deutschlandfunkkultur.de/1.0 s49 ms3.9 ms
/static/generated/deutschlandfunk_kultur/player.dist.js736 ms133 ms41 ms
Unattributable618 ms9.6 ms0.0 ms
www.deutschlandfunkkultur.de/static/podlove-player/5.12.3/player/bootstrap.js419 ms410 ms9.2 ms
www.deutschlandfunkkultur.de/static/podlove-player/embed.js135 ms124 ms9.9 ms
www.deutschlandfunkkultur.de/static/podlove-player/5.12.3/player/styles.css72 ms0.0 ms0.0 ms
www.deutschlandfunkkultur.de/static/podlove-player/5.12.3/player/vendor.js70 ms13 ms52 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation2.0 s
Other1.2 s
Style & Layout619 ms
Parse HTML & CSS246 ms
Rendering152 ms
Script Parsing & Compilation146 ms
Garbage Collection19 ms

Large network payloads cost users real money and are highly correlated with long load times. Learn how to reduce payload sizes.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer Size
/static/generated/deutschlandfunk_kultur/main.modern.js671.9 KiB
www.deutschlandfunkkultur.de/624.3 KiB
www.deutschlandfunkkultur.de/static/podlove-player/5.12.3/player/vendor.js237.4 KiB
/static/generated/deutschlandfunk_kultur/player.dist.js160.3 KiB
www.deutschlandfunkkultur.de/static/podlove-player/5.12.3/player/styles.css158.3 KiB
/d5/05/f3/3b/d505f33b-edd6-41f1-8f93-a532c837823d/die-lie...143.1 KiB
/d1/8c/54/9d/d18c549d-b068-4c10-b74b-54bfb8b10767/dlfkjid...111.9 KiB
/31/09/0a/06/31090a06-3341-46f1-a3b8-9d493e61e177/klassik...111.5 KiB
/a3/af/17/3b/a3af173b-8a83-4f52-b593-fa9f4e25bf65/charlot...109.8 KiB
/10/6e/51/e7/106e51e7-3211-448d-8f55-e0fb9db9f3bb/russlan...96.2 KiB

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Layout shift culprits
●Optimize DOM size
●Forced reflow
●LCP breakdown
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●Avoid long main-thread tasks 13 long tasks found
●Image elements have explicit `width` and `height`
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 20 ms
●Server Backend Latencies 20 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 10 ms
●Avoid large layout shifts 2 layout shifts found
○INP breakdown
○User Timing marks and measures
○Avoid non-composited animations
84

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Names and labels

When a button doesn't have an accessible name, screen readers announce it as "button", making it unusable for users who rely on screen readers. Learn how to make buttons more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div.navigation-container > ul.navigation-mobile > li.navigation-mobile-item > button.b-btn-text div.navigation-container > ul.navigation-mobile > li.navigation-mobile-item > button.b-btn-text

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Contrast

Low-contrast text is difficult or impossible for many users to read. Learn how to provide sufficient color contrast.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Archiv a.b-teaser-l > div.teaser-l-content-wrapper > div.b-teaser-headline > div.b-label-archive
102:09 Minuten li.list-thema-audio-item > div.list-thema-audio-item-content > div.b-btn-player-duration > div.btn-player-duration-text
121:43 Minuten li.list-thema-audio-item > div.list-thema-audio-item-content > div.b-btn-player-duration > div.btn-player-duration-text
94:17 Minuten li.list-thema-audio-item > div.list-thema-audio-item-content > div.b-btn-player-duration > div.btn-player-duration-text
92:21 Minuten li.list-thema-audio-item > div.list-thema-audio-item-content > div.b-btn-player-duration > div.btn-player-duration-text
119:43 Minuten li.list-thema-audio-item > div.list-thema-audio-item-content > div.b-btn-player-duration > div.btn-player-duration-text

These are opportunities to improve the legibility of your content.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
ARD| nav.partner-nav > ul.b-list > li.list-item > a.b-link
ZDF| nav.partner-nav > ul.b-list > li.list-item > a.b-link
Phoenix| nav.partner-nav > ul.b-list > li.list-item > a.b-link

These items highlight common accessibility best practices.

○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Image elements have `[alt]` attributes
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●ARIA attributes are used as specified for the element's role
●Elements use only permitted ARIA attributes
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links have a discernible name
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●No element has a `[tabindex]` value greater than 0
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Image elements do not have `[alt]` attributes that are redundant text.
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○Deprecated ARIA roles were not used
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○`[aria-hidden="true"]` elements do not contain focusable descendents
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○`[role]`s have all required `[aria-*]` attributes
○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
○`[role]`s are contained by their required parent element
○`[role]` values are valid
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○ARIA IDs are unique
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○Form elements have associated labels
○Links are distinguishable without relying on color.
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Skip links are focusable.
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Uses ARIA roles only on compatible elements
○Identical links have the same purpose.
○Elements with visible text labels have matching accessible names.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
96

Best Practices

General

Errors logged to the console indicate unresolved problems. They can come from network request failures and other browser concerns. Learn more about this errors in console diagnostic audit

Why this matters

Performance issues directly impact user engagement and conversion rates.

SourceDescription
/static/generated/deutschlandfunk_kultur/main.modern.js line 1, col 3371999
Error: No options detected. Please consult documentation. at AI.publish (https://www.deutschlandfunkkultur.de/static/generated/deutschlandfunk_kultur/main.modern.js:2:3372000) at https://www.deutschlandfunkkultur.de/static/generated/deutschlandfunk_kultur/main.modern.js:2:3373376
/static/generated/deutschlandfunk_kultur/main.modern.js line 1, col 2634622
ESI Fragment already exists teaser-group-horizontal-item

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLMap URL
www.deutschlandfunkkultur.de/static/podlove-player/5.12.3/player/vendor.js
/static/generated/deutschlandfunk_kultur/player.dist.js
/static/generated/deutschlandfunk_kultur/main.modern.js
www.deutschlandfunkkultur.de/www.deutschlandfunkkultur.de/iframeResizer.contentWindow.map
●Uses HTTPS
●Avoids deprecated APIs
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Displays images with correct aspect ratio
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
100

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

○Structured data is valid
●Page isn’t blocked from indexing
●Document has a `<title>` element
●Document has a meta description
●Page has successful HTTP status code
●Links have descriptive text
●Links are crawlable
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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