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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
5
REVIEW
3
PASS
5
INFO
2

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
83
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
92
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

1.41 s

Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.

1.74 s

Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.

79 ms

Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.

0.002

Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.

2.57 s

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

4.51 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
15
5 PASS 3 REVIEW 5 FIX
D
Page Weight Budget
Action
2.4 MB transferred, 142 requests
FIX
2.4 MB transferred, 142 requests
Info::
Page weighs 7.5 MB (2.4 MB transferred)
Warning::
JavaScript is 1.8 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.8 MB
Warning::
142 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.50 g CO2 per page load
2.4 MB / 2.4 MB budget
2.4 MB transferred
142 requests
0.50 g CO2 per page load
JavaScript 1.8 MiB 77%
Images 331.2 KiB 14%
Fonts 122.4 KiB 5%
Other 38.8 KiB 2%
HTML 25.9 KiB 1%
CSS 23.9 KiB 1%
Other 8.9 KiB 0%
Other 4.8 KiB 0%
Other 1015 B 0%
Other 564 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (2.4 MiB of 2.4 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Bundles
Action
53 scripts, 880 KB unused
FIX
53 scripts, 880 KB unused
Warning::
https://cdn.intergient.com/prebid/prebid.05eaa3284...: 166 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 128 KB unused (68%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://imasdk.googleapis.com/js/sdkloader/ima3.js: 110 KB unused (75%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.intergient.com/pageos/V.20260416.1/mai...: 95 KB unused (55%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-TR3...: 63 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 880 KB
880 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.intergient.com/prebid/prebid.05eaa3284c60ad6e334d.js222 KB166 KB (75%)✓3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604200101/pubads_impl.js?cb=31097964188 KB128 KB (68%)✓3rd
https://imasdk.googleapis.com/js/sdkloader/ima3.js147 KB110 KB (75%)✓3rd
https://cdn.intergient.com/pageos/V.20260416.1/main.121b53b8564b55f13382.js172 KB95 KB (55%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-TR3Q62P134 KB63 KB (47%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-EE39KM547B&cx=c&gtm=4e64h1157 KB61 KB (39%)✓3rd
https://olytics.omeda.com/olytics/js/v3/p/olytics.min.js71 KB47 KB (66%)✓3rd
https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/chunks/0vspnf943q25..js87 KB42 KB (48%)✓3rd
https://c.amazon-adsystem.com/aax2/apstag.js91 KB40 KB (44%)✓3rd
https://securepubads.g.doubleclick.net/tag/js/gpt.js34 KB37 KB (34%)✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

F
Page Weight Inventory
Action
142 resources · 2.4 MB · 880 KB savings available
FIX
142 resources · 2.4 MB · 880 KB savings available
Warning::
Page weight 1.4 MB over 1MB target
Got: 2.4 MB Expected: ≤ 1 MB
Info::
~880 KB of savings available
Warning::
141 third-party resources (100% of weight)
Info::
1 resources over 200KB
142 resources · 2.4 MiB · 141 third-party 1.4 MiB over 1MB target
JavaScript 77% · 1.8 MiB
Image 14% · 349.3 KiB
Font 5% · 122.4 KiB
Other 1% · 32.7 KiB
Document 1% · 26.1 KiB
CSS 1% · 23.9 KiB

~879.5 KiB of savings available

Remove unused JavaScript: 879.5 KiB
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B
Image Optimization
28 images, 0 KB saveable
REVIEW
28 images, 0 KB saveable
Info::
All images are well-optimized
28 images 331 KB
0 oversized -0 KB
4 legacy format
0 missing dimensions CLS risk
C
JS Execution Cost
Action
1071ms total JS execution
REVIEW
1071ms total JS execution
Info::
Unattributable: 170ms CPU time
Info::
https://www.discovermagazine.com/: 131ms CPU time
Info::
https://fundingchoicesmessages.google.com/f/AGSKWx...: 120ms CPU time
Info::
https://cdn.intergient.com/pageos/V.20260416.1/mai...: 115ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-TR3...: 87ms CPU time
Warning::
Third-party scripts: 1071ms (100% of total)

Main Thread Breakdown

Script Evaluation 64% Other 14% Script Parsing & Compilation 11% Style & Layout 5%
ScriptTotalScriptingParse/CompileParty
Unattributable170ms18ms0ms3rd
https://www.discovermagazine.com/131ms28ms0ms3rd
https://fundingchoicesmessages.google.com/f/AGSKWxVwPOrz9wZrynhq9_176z8cjPNxcRRbIbPSLnO3xQ_sRTqsHzK3qGSI1KQrhlnaMBRdbORXzI0biNzHofb6k8Sb184lEXiKlvP3_hfRJUhHJuw-nf1_hTz21gXdnXGHtMAs45p4Qw==?fccs=W251bGwsbnVsbCxudWxsLG51bGwsbnVsbCxudWxsLFsxNzc2ODA2ODU4LDkyMTAwMDAwMF0sbnVsbCxudWxsLG51bGwsW251bGwsWzddXSwiaHR0cHM6Ly93d3cuZGlzY292ZXJtYWdhemluZS5jb20vIixudWxsLFtbOCwiRHNLR04tcXFmclEiXSxbOSwiZW4tVVMiXSxbMTgsIltbW251bGwsMTgwNV1dXSJdLFszNSwiMTc3NjgwNjg1OCJdLFsxOSwiMSJdLFsxNywiWzBdIl0sWzI0LCIiXSxbMjksImZhbHNlIl1dXQ120ms54ms22ms3rd
https://cdn.intergient.com/pageos/V.20260416.1/main.121b53b8564b55f13382.js115ms97ms11ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-TR3Q62P87ms78ms8ms3rd
https://cdn.p-n.io/pushly-sdk.min.js?domain_key=Ff3N9Ju7yjY5sVsNj3KsWfzinL2trtoylF7A79ms70ms3ms3rd
https://www.googletagmanager.com/gtag/js?id=G-EE39KM547B&cx=c&gtm=4e64h175ms64ms9ms3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604200101/pubads_impl.js?cb=3109796464ms45ms16ms3rd
https://cdn.intergient.com/prebid/prebid.05eaa3284c60ad6e334d.js64ms48ms16ms3rd
https://olytics.omeda.com/olytics/js/v3/p/olytics.min.js60ms49ms6ms3rd

Showing top 10 of 12 scripts

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
5 fonts (122 KB)
PASS
5 fonts (122 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

122 KB total

Render-blocking

0

of 5

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.4 s LCP 1.7 shttps://cdn.discovermagazine.com/immutable-assets/fonts/FjallaOne.woff2FjallaOne.woff2 https://cdn.discovermagazine.com/immutable-assets/fonts/FjallaOne.woff2 — 37.6 KiB — 81 ms — font-display: swaphttps://cdn.discovermagazine.com/immutable-assets/fonts/Martel.woff2Martel.woff2 https://cdn.discovermagazine.com/immutable-assets/fonts/Martel.woff2 — 12.1 KiB — 65 ms — font-display: swaphttps://cdn.discovermagazine.com/immutable-assets/fonts/NunitoSans.woff2NunitoSans.woff2 https://cdn.discovermagazine.com/immutable-assets/fonts/NunitoSans.woff2 — 30.7 KiB — 84 ms — font-display: swaphttps://fonts.gstatic.com/s/opensans/v40/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2memvYaGs126MiZpBA-UvWbX... https://fonts.gstatic.com/s/opensans/v40/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 42.1 KiB — 68 ms — font-display: swaphttps://fonts.gstatic.com/s/opensans/v40/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2memvYaGs126MiZpBA-UvWbX... https://fonts.gstatic.com/s/opensans/v40/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 0 B — 66 ms — font-display: swap
FjallaOne.woff2 woff2 swap
Size 38 KB
Load time 81 ms
Start 714 ms
Risk FOUT — text flashes from fallback to web font
Martel.woff2 woff2 swap
Size 12 KB
Load time 65 ms
Start 715 ms
Risk FOUT — text flashes from fallback to web font
NunitoSans.woff2 woff2 swap
Size 31 KB
Load time 84 ms
Start 716 ms
Risk FOUT — text flashes from fallback to web font
memvYaGs126MiZpBA-UvWbX... woff2 swap
Size 42 KB
Load time 68 ms
Start 2.3 s
Risk FOUT — text flashes from fallback to web font
memvYaGs126MiZpBA-UvWbX... woff2 swap
Size 0 KB
Load time 66 ms
Start 2.3 s
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
142 requests over 6305ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 1.4 s LCP 1.7 shttps://discovermagazine.com// https://discovermagazine.com/ — 301 — 53 B — 329 ms — h2https://www.discovermagazine.com/www.discovermagazine.com/ https://www.discovermagazine.com/ — 200 — 21.9 KiB — 477 ms — h2https://cdn.discovermagazine.com/immutable-assets/fonts/FjallaOne.woff2cdn.discovermagazine.com/immutable-... https://cdn.discovermagazine.com/immutable-assets/fonts/FjallaOne.woff2 — 200 — 37.6 KiB — 81 ms — h2https://cdn.discovermagazine.com/immutable-assets/fonts/Martel.woff2cdn.discovermagazine.com/immutable-... https://cdn.discovermagazine.com/immutable-assets/fonts/Martel.woff2 — 200 — 12.1 KiB — 65 ms — h2https://cdn.discovermagazine.com/immutable-assets/fonts/NunitoSans.woff2cdn.discovermagazine.com/immutable-... https://cdn.discovermagazine.com/immutable-assets/fonts/NunitoSans.woff2 — 200 — 30.7 KiB — 84 ms — h2https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/chunks/03mdprn4k07~0.csscdn.discovermagazine.com/statics/1.... https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/chunks/03mdprn4k07~0.css — 200 — 12.9 KiB — 66 ms — h2https://cdn.discovermagazine.com/immutable-assets/images/logos/discover.svgcdn.discovermagazine.com/immutable-... https://cdn.discovermagazine.com/immutable-assets/images/logos/discover.svg — 200 — 1.4 KiB — 59 ms — h2https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/chunks/0n2g2.x0cqeu4.jscdn.discovermagazine.com/statics/1.... https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/chunks/0n2g2.x0cqeu4.js — 200 — 4.0 KiB — 58 ms — h2https://cdn.discovermagazine.com/immutable-assets/favicon/site.webmanifestcdn.discovermagazine.com/immutable-... https://cdn.discovermagazine.com/immutable-assets/favicon/site.webmanifest — 200 — 1015 B — 20 ms — h2https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/chunks/09jinfr3kt7_1.jscdn.discovermagazine.com/statics/1.... https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/chunks/09jinfr3kt7_1.js — 200 — 9.3 KiB — 30 ms — h2https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/chunks/01e55.odc1~lg.jscdn.discovermagazine.com/statics/1.... https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/chunks/01e55.odc1~lg.js — 200 — 15.5 KiB — 40 ms — h2https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/chunks/0vspnf943q25..jscdn.discovermagazine.com/statics/1.... https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/chunks/0vspnf943q25..js — 200 — 87.2 KiB — 57 ms — h2https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/chunks/turbopack-14vzc2nba4bdm.jscdn.discovermagazine.com/statics/1.... https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/chunks/turbopack-14vzc2nba4bdm.js — 200 — 4.4 KiB — 31 ms — h2https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/chunks/0~wdrhz4x~fnx.jscdn.discovermagazine.com/statics/1.... https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/chunks/0~wdrhz4x~fnx.js — 200 — 7.1 KiB — 40 ms — h2https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/chunks/0x_rtgq1m5w9y.jscdn.discovermagazine.com/statics/1.... https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/chunks/0x_rtgq1m5w9y.js — 200 — 9.3 KiB — 25 ms — h2https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/chunks/0sqkoexmgc7.i.jscdn.discovermagazine.com/statics/1.... https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/chunks/0sqkoexmgc7.i.js — 200 — 12.0 KiB — 27 ms — h2https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/chunks/turbopack-001ftal8f-sn..jscdn.discovermagazine.com/statics/1.... https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/chunks/turbopack-001ftal8f-sn..js — 200 — 4.4 KiB — 40 ms — h2https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/AYTDTU2yVL4HwAce2Al-l/_buildManifest.jscdn.discovermagazine.com/statics/1.... https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/AYTDTU2yVL4HwAce2Al-l/_buildManifest.js — 200 — 1.1 KiB — 34 ms — h2https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/AYTDTU2yVL4HwAce2Al-l/_ssgManifest.jscdn.discovermagazine.com/statics/1.... https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/AYTDTU2yVL4HwAce2Al-l/_ssgManifest.js — 200 — 462 B — 32 ms — h2https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/AYTDTU2yVL4HwAce2Al-l/_clientMiddlewareManifest.jscdn.discovermagazine.com/statics/1.... https://cdn.discovermagazine.com/statics/1.12.6/1776779046/_next/static/AYTDTU2yVL4HwAce2Al-l/_clientMiddlewareManifest.js — 200 — 715 B — 36 ms — h2https://cdn.discovermagazine.com/immutable-assets/images/icons/staycuriousicon.svgcdn.discovermagazine.com/immutable-... https://cdn.discovermagazine.com/immutable-assets/images/icons/staycuriousicon.svg — 200 — 813 B — 30 ms — h2https://cdn.discovermagazine.com/assets/image/59117/desi-star-trails-m.webpcdn.discovermagazine.com/assets/ima... https://cdn.discovermagazine.com/assets/image/59117/desi-star-trails-m.webp — 200 — 77.0 KiB — 26 ms — h2https://cdn.discovermagazine.com/assets/image/59109/california-seal-making-noise-xs.webpcdn.discovermagazine.com/assets/ima... https://cdn.discovermagazine.com/assets/image/59109/california-seal-making-noise-xs.webp — 200 — 8.5 KiB — 45 ms — h2https://cdn.discovermagazine.com/assets/image/59105/new-spider-species-pikelinia-floydmuraria-xs.webpcdn.discovermagazine.com/assets/ima... https://cdn.discovermagazine.com/assets/image/59105/new-spider-species-pikelinia-floydmuraria-xs.webp — 200 — 5.0 KiB — 47 ms — h2https://cdn.discovermagazine.com/assets/image/59080/dried-landscape-xs.webpcdn.discovermagazine.com/assets/ima... https://cdn.discovermagazine.com/assets/image/59080/dried-landscape-xs.webp — 200 — 21.2 KiB — 48 ms — h2https://cdn.discovermagazine.com/assets/image/59104/comet-3i-atlas-2-xs.webpcdn.discovermagazine.com/assets/ima... https://cdn.discovermagazine.com/assets/image/59104/comet-3i-atlas-2-xs.webp — 200 — 9.4 KiB — 49 ms — h2https://cdn.discovermagazine.com/assets/image/59101/pembroke-castle-xs.webpcdn.discovermagazine.com/assets/ima... https://cdn.discovermagazine.com/assets/image/59101/pembroke-castle-xs.webp — 200 — 13.5 KiB — 50 ms — 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https://cdn.intergient.com/pageos/V.20260416.1/982.c24d886cad6d41d9b988.js — 200 — 3.0 KiB — 28 ms — h2https://cdn.intergient.com/pageos/V.20260416.1/cornerAdVideo.3feb976af5dc3b39bd68.jscdn.intergient.com/pageos/V.2026041... https://cdn.intergient.com/pageos/V.20260416.1/cornerAdVideo.3feb976af5dc3b39bd68.js — 200 — 13.6 KiB — 28 ms — h2https://cdn.intergient.com/pageos/V.20260416.1/videoPlayers/ima-based-player.jscdn.intergient.com/pageos/V.2026041... https://cdn.intergient.com/pageos/V.20260416.1/videoPlayers/ima-based-player.js — 200 — 22.8 KiB — 34 ms — h2https://geo.privacymanager.io/geo.privacymanager.io/ https://geo.privacymanager.io/ — 200 — 0 B — 86 ms — h2https://api.id5-sync.com/analytics/483/id5-api-jsapi.id5-sync.com/analytics/483/id5-... https://api.id5-sync.com/analytics/483/id5-api-js — 200 — 691 B — 80 ms — h2https://geo.privacymanager.io/geo.privacymanager.io/ https://geo.privacymanager.io/ — 200 — 424 B — 18 ms — h2https://cdp.omeda.com/olytics/segments/pcdp.omeda.com/olytics/segments/p https://cdp.omeda.com/olytics/segments/p — 200 — 308 B — 305 ms — http/1.1https://pagead2.googlesyndication.com/pagead/ping?e=1pagead2.googlesyndication.com/pagea... https://pagead2.googlesyndication.com/pagead/ping?e=1 — 204 — 20 B — 27 ms — h3https://ad-delivery.net/px.gif?ch=2&e=0.19102003965363ad-delivery.net/px.gif?ch=2&e=0.191... https://ad-delivery.net/px.gif?ch=2&e=0.19102003965363 — 200 — 136 B — 22 ms — h2https://ad.doubleclick.net/favicon.ico?ad=300x250&ad_box_=1&adnet=1&showad=1&size=250x250&e=0.9416929142879515ad.doubleclick.net/favicon.ico?ad=3... https://ad.doubleclick.net/favicon.ico?ad=300x250&ad_box_=1&adnet=1&showad=1&size=250x250&e=0.9416929142879515 — 200 — 129 B — 25 ms — h3https://ad-delivery.net/px.gif?ch=1&e=0.17709926663912423ad-delivery.net/px.gif?ch=1&e=0.177... https://ad-delivery.net/px.gif?ch=1&e=0.17709926663912423 — 200 — 110 B — 23 ms — h2https://ab.dns-finder.com/meta/dnsab.dns-finder.com/meta/dns https://ab.dns-finder.com/meta/dns — 200 — 0 B — 2 ms — h2https://ad-delivery.net/px.gif?ch=1&e=0.04836287283608098ad-delivery.net/px.gif?ch=1&e=0.048... https://ad-delivery.net/px.gif?ch=1&e=0.04836287283608098 — 200 — 110 B — 24 ms — h2https://ad-delivery.net/px.gif?ch=2&e=0.7308082859727824ad-delivery.net/px.gif?ch=2&e=0.730... https://ad-delivery.net/px.gif?ch=2&e=0.7308082859727824 — 200 — 113 B — 23 ms — h2https://ad.doubleclick.net/favicon.ico?ad=300x250&ad_box_=1&adnet=1&showad=1&size=250x250&e=0.6196856423860212ad.doubleclick.net/favicon.ico?ad=3... https://ad.doubleclick.net/favicon.ico?ad=300x250&ad_box_=1&adnet=1&showad=1&size=250x250&e=0.6196856423860212 — 200 — 129 B — 25 ms — h3https://ad-delivery.net/px.gif?ch=2&e=0.06121350203700193ad-delivery.net/px.gif?ch=2&e=0.061... https://ad-delivery.net/px.gif?ch=2&e=0.06121350203700193 — 200 — 110 B — 23 ms — h2https://ad.doubleclick.net/favicon.ico?ad=300x250&ad_box_=1&adnet=1&showad=1&size=250x250&e=0.328574641175307ad.doubleclick.net/favicon.ico?ad=3... https://ad.doubleclick.net/favicon.ico?ad=300x250&ad_box_=1&adnet=1&showad=1&size=250x250&e=0.328574641175307 — 200 — 129 B — 24 ms — h3https://ad-delivery.net/px.gif?ch=2&e=0.4982840694099677ad-delivery.net/px.gif?ch=2&e=0.498... https://ad-delivery.net/px.gif?ch=2&e=0.4982840694099677 — 200 — 133 B — 22 ms — h2https://ad.doubleclick.net/favicon.ico?ad=300x250&ad_box_=1&adnet=1&showad=1&size=250x250&e=0.7423470529766084ad.doubleclick.net/favicon.ico?ad=3... https://ad.doubleclick.net/favicon.ico?ad=300x250&ad_box_=1&adnet=1&showad=1&size=250x250&e=0.7423470529766084 — 200 — 129 B — 25 ms — h3https://cd836371f1d.cdn.intergient.com/fb87a4ea41cd836371f1d.cdn.intergient.com/fb87... https://cd836371f1d.cdn.intergient.com/fb87a4ea41 — 200 — 95 B — 34 ms — h2https://ad-delivery.net/px.gif?ch=2&e=0.08369745556039598ad-delivery.net/px.gif?ch=2&e=0.083... https://ad-delivery.net/px.gif?ch=2&e=0.08369745556039598 — 200 — 116 B — 24 ms — h2https://ad.doubleclick.net/favicon.ico?ad=300x250&ad_box_=1&adnet=1&showad=1&size=250x250&e=0.8403097983609396ad.doubleclick.net/favicon.ico?ad=3... https://ad.doubleclick.net/favicon.ico?ad=300x250&ad_box_=1&adnet=1&showad=1&size=250x250&e=0.8403097983609396 — 200 — 129 B — 25 ms — h3https://region1.analytics.google.com/g/collect?v=2&tid=G-EE39KM547B&gtm=45je64h1v889322333za20gzb813067043zd813067043&_p=1776806857868&gcd=13l3lPl2l1l1&npa=1&dma_cps=a&dma=1&_eu=AEAAAGQ&ae=a&are=1&cid=1812881524.1776806858&frm=0&pscdl=noapi&rcb=7&sr=800x600&uaa=x86&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=2&tag_exp=0~115938466~115938469~117266401&sid=1776806858&sct=1&seg=0&dl=https%3A%2F%2Fwww.discovermagazine.com%2F&dt=Stories%20That%20Matter%20%7C%20Discover%20Magazine&en=scroll&ep.page_type=Homepage&ep.scienceCategoryPrimary=&ep.author=&ep.organization=&ep.tags=&epn.percent_scrolled=90&_et=11&tfd=6279region1.analytics.google.com/g/coll... https://region1.analytics.google.com/g/collect?v=2&tid=G-EE39KM547B&gtm=45je64h1v889322333za20gzb813067043zd813067043&_p=1776806857868&gcd=13l3lPl2l1l1&npa=1&dma_cps=a&dma=1&_eu=AEAAAGQ&ae=a&are=1&cid=1812881524.1776806858&frm=0&pscdl=noapi&rcb=7&sr=800x600&uaa=x86&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=2&tag_exp=0~115938466~115938469~117266401&sid=1776806858&sct=1&seg=0&dl=https%3A%2F%2Fwww.discovermagazine.com%2F&dt=Stories%20That%20Matter%20%7C%20Discover%20Magazine&en=scroll&ep.page_type=Homepage&ep.scienceCategoryPrimary=&ep.author=&ep.organization=&ep.tags=&epn.percent_scrolled=90&_et=11&tfd=6279 — 204 — 48 B — 26 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 1071ms · 1238KB · CA$15/mo
Unattributable
Other
Optional
Execution 170ms
Transfer 0 KB
Monthly Cost CA$2/mo
www.discovermagazine.com
Other
Optional
Execution 131ms
Transfer 22 KB
Monthly Cost CA$2/mo
fundingchoicesmessages.google.com
Other
Optional
Execution 120ms
Transfer 106 KB
Monthly Cost CA$2/mo
cdn.intergient.com
Other
Optional
Execution 115ms
Transfer 172 KB
Unused 55%
Monthly Cost CA$2/mo
Google Tag Manager
Tag Manager
Optional
Execution 87ms
Transfer 134 KB
Unused 47%
Monthly Cost CA$1/mo
cdn.p-n.io
Other
Optional
Execution 79ms
Transfer 46 KB
Monthly Cost CA$1/mo
Google Tag Manager
Tag Manager
Optional
Execution 75ms
Transfer 157 KB
Unused 39%
Monthly Cost CA$1/mo
securepubads.g.doubleclick.net
Other
Optional
Execution 64ms
Transfer 188 KB
Unused 68%
Monthly Cost CA$1/mo
cdn.intergient.com
Other
Optional
Execution 64ms
Transfer 222 KB
Unused 75%
Monthly Cost CA$1/mo
olytics.omeda.com
Other
Optional
Execution 60ms
Transfer 71 KB
Unused 66%
Monthly Cost CA$1/mo
btloader.com
Other
Optional
Execution 53ms
Transfer 50 KB
Monthly Cost CA$1/mo
fundingchoicesmessages.google.com
Other
Optional
Execution 52ms
Transfer 70 KB
Unused 52%
Monthly Cost CA$1/mo

100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

Source: web.dev

55% of cdn.intergient.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

68% of securepubads.g.doubleclick.net's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

75% of cdn.intergient.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

66% of olytics.omeda.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

52% of fundingchoicesmessages.google.com's code is unused. The script may be loading features you don't use.

Why this matters

Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.

Source: web.dev

How third-party costs are calculated

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

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