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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
6
REVIEW
1
PASS
8
INFO
2

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

Mobile Desktop
30
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.
96
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.

6.19 s

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

7.68 s

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

1.59 s

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

0.026

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

11.85 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.

22.05 s

Page Load Progression

667 ms
1.3 s
2.0 s
2.7 s
3.3 s
4.0 s
4.7 s
5.3 s
Checks
17
8 PASS 1 REVIEW 6 FIX
D
Page Weight Budget
Action
2.2 MB transferred, 127 requests
FIX
2.2 MB transferred, 127 requests
Info::
Page weighs 7.4 MB (2.2 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::
127 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.47 g CO2 per page load
2.2 MB / 2.4 MB budget
2.2 MB transferred
127 requests
0.47 g CO2 per page load
JavaScript 1.8 MiB 82%
Images 196.2 KiB 9%
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 5.2 KiB 0%
Other 1016 B 0%
Other 555 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 (2.2 MiB of 2.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
4907ms total JS execution
FIX
4907ms total JS execution
Warning::
Unattributable: 782ms CPU time
Warning::
https://cdn.intergient.com/pageos/V.20260416.1/mai...: 551ms CPU time
Warning::
https://www.discovermagazine.com/: 548ms CPU time
Warning::
https://fundingchoicesmessages.google.com/f/AGSKWx...: 464ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-EE39...: 388ms CPU time
Warning::
Third-party scripts: 4907ms (100% of total)

Main Thread Breakdown

Script Evaluation 63% Other 16% Script Parsing & Compilation 10% Style & Layout 5% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
Unattributable782ms109ms0ms3rd
https://cdn.intergient.com/pageos/V.20260416.1/main.121b53b8564b55f13382.js551ms480ms48ms3rd
https://www.discovermagazine.com/548ms149ms1ms3rd
https://fundingchoicesmessages.google.com/f/AGSKWxX4-kFAjBE7pxJ9M8xBk-ZeuIwM_hwVX43pe4p8lb3rD2hIwAuJpckPKH99snMrQQhdAciE0A3H2_80UgW7Yym_ZXAclMegN_jApSlIRN1qsxc_hCP2sjmBjFIsvk-vAXee1QggyQ==?fccs=W251bGwsbnVsbCxudWxsLG51bGwsbnVsbCxudWxsLFsxNzc2ODA2ODM1LDY1MTAwMDAwMF0sbnVsbCxudWxsLG51bGwsW251bGwsWzddXSwiaHR0cHM6Ly93d3cuZGlzY292ZXJtYWdhemluZS5jb20vIixudWxsLFtbOCwiRHNLR04tcXFmclEiXSxbOSwiZW4tVVMiXSxbMTgsIltbW251bGwsNDc0M11dXSJdLFszNSwiMTc3NjgwNjgzNSJdLFsxOSwiMSJdLFsxNywiWzBdIl0sWzI0LCIiXSxbMjksImZhbHNlIl1dXQ464ms204ms79ms3rd
https://www.googletagmanager.com/gtag/js?id=G-EE39KM547B&cx=c&gtm=4e64h1h1388ms336ms45ms3rd
https://cdn.p-n.io/pushly-sdk.min.js?domain_key=Ff3N9Ju7yjY5sVsNj3KsWfzinL2trtoylF7A337ms298ms12ms3rd
https://cdn.intergient.com/prebid/prebid.05eaa3284c60ad6e334d.js303ms231ms58ms3rd
https://fundingchoicesmessages.google.com/i/154013155?ers=3207ms180ms24ms3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js205ms160ms42ms3rd
https://btloader.com/tag?o=5150306120761344&upapi=true194ms170ms15ms3rd

Showing top 10 of 18 scripts

F
JS Bundles
Action
53 scripts, 831 KB unused
FIX
53 scripts, 831 KB unused
Warning::
https://cdn.intergient.com/prebid/prebid.05eaa3284...: 182 KB unused (82%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 132 KB unused (70%)
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...: 102 KB unused (59%)
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: 831 KB
831 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.intergient.com/prebid/prebid.05eaa3284c60ad6e334d.js222 KB182 KB (82%)✓3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js188 KB132 KB (70%)✓3rd
https://imasdk.googleapis.com/js/sdkloader/ima3.js147 KB110 KB (75%)✓3rd
https://cdn.intergient.com/pageos/V.20260416.1/main.121b53b8564b55f13382.js172 KB102 KB (59%)✓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=4e64h1h1157 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 KB38 KB (41%)✓3rd
https://fundingchoicesmessages.google.com/i/154013155?ers=370 KB36 KB (52%)✓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
127 resources · 2.2 MB · 831 KB savings available
FIX
127 resources · 2.2 MB · 831 KB savings available
Warning::
Page weight 1.2 MB over 1MB target
Got: 2.2 MB Expected: ≤ 1 MB
Info::
~831 KB of savings available
Warning::
126 third-party resources (100% of weight)
Info::
1 resources over 200KB
127 resources · 2.2 MiB · 126 third-party 1.2 MiB over 1MB target
JavaScript 82% · 1.8 MiB
Image 9% · 214.3 KiB
Font 5% · 122.4 KiB
Other 1% · 33.1 KiB
Document 1% · 26.1 KiB
CSS 1% · 23.9 KiB

~830.8 KiB of savings available

Remove unused JavaScript: 830.8 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.

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
Image Optimization
11 images, 0 KB saveable
PASS
11 images, 0 KB saveable
Info::
All images are well-optimized
11 images 196 KB
0 oversized -0 KB
3 legacy format
0 missing dimensions CLS risk
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 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s FCP 6.2 s LCP 7.7 shttps://cdn.discovermagazine.com/immutable-assets/fonts/FjallaOne.woff2FjallaOne.woff2 https://cdn.discovermagazine.com/immutable-assets/fonts/FjallaOne.woff2 — 37.6 KiB — 116 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 — 128 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 — 123 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 — 85 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 — 85 ms — font-display: swap
FjallaOne.woff2 woff2 swap
Size 38 KB
Load time 116 ms
Start 3.9 s
Risk FOUT — text flashes from fallback to web font
Martel.woff2 woff2 swap
Size 12 KB
Load time 128 ms
Start 3.9 s
Risk FOUT — text flashes from fallback to web font
NunitoSans.woff2 woff2 swap
Size 31 KB
Load time 123 ms
Start 3.9 s
Risk FOUT — text flashes from fallback to web font
memvYaGs126MiZpBA-UvWbX... woff2 swap
Size 42 KB
Load time 85 ms
Start 5.2 s
Risk FOUT — text flashes from fallback to web font
memvYaGs126MiZpBA-UvWbX... woff2 swap
Size 0 KB
Load time 85 ms
Start 5.2 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
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
127 requests over 9493ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s 7.0 s 8.0 s 9.0 s FCP 6.2 s LCP 7.7 shttps://discovermagazine.com// https://discovermagazine.com/ — 301 — 53 B — 342 ms — h2https://www.discovermagazine.com/www.discovermagazine.com/ https://www.discovermagazine.com/ — 200 — 21.9 KiB — 3.5 s — 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 — 116 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 — 128 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 — 123 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 — 128 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 — 124 ms — h2https://cdn.discovermagazine.com/assets/image/59117/desi-star-trails-s.webpcdn.discovermagazine.com/assets/ima... https://cdn.discovermagazine.com/assets/image/59117/desi-star-trails-s.webp — 200 — 40.2 KiB — 121 ms — h2https://cdn.discovermagazine.com/immutable-assets/favicon/site.webmanifestcdn.discovermagazine.com/immutable-... https://cdn.discovermagazine.com/immutable-assets/favicon/site.webmanifest — 200 — 1016 B — 23 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 — 44 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 — 50 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 — 52 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 — 60 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 — 51 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 — 36 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 — 40 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 — 38 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 — 48 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 — 57 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 — 461 B — 28 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 — 716 B — 45 ms — h2https://cdn.discovermagazine.com/assets/image/59109/california-seal-making-noise-s.webpcdn.discovermagazine.com/assets/ima... https://cdn.discovermagazine.com/assets/image/59109/california-seal-making-noise-s.webp — 200 — 14.5 KiB — 29 ms — h2https://cdn.discovermagazine.com/assets/image/59105/new-spider-species-pikelinia-floydmuraria-s.webpcdn.discovermagazine.com/assets/ima... https://cdn.discovermagazine.com/assets/image/59105/new-spider-species-pikelinia-floydmuraria-s.webp — 200 — 8.7 KiB — 31 ms — h2https://cdn.discovermagazine.com/assets/image/59080/dried-landscape-s.webpcdn.discovermagazine.com/assets/ima... https://cdn.discovermagazine.com/assets/image/59080/dried-landscape-s.webp — 200 — 38.6 KiB — 32 ms — h2https://cdn.discovermagazine.com/assets/image/59104/comet-3i-atlas-2-s.webpcdn.discovermagazine.com/assets/ima... https://cdn.discovermagazine.com/assets/image/59104/comet-3i-atlas-2-s.webp — 200 — 19.9 KiB — 34 ms — h2https://cdn.discovermagazine.com/assets/image/59101/pembroke-castle-s.webpcdn.discovermagazine.com/assets/ima... https://cdn.discovermagazine.com/assets/image/59101/pembroke-castle-s.webp — 200 — 24.3 KiB — 37 ms — h2https://cdn.discovermagazine.com/assets/image/59098/saturns-moon-titan-s.webpcdn.discovermagazine.com/assets/ima... https://cdn.discovermagazine.com/assets/image/59098/saturns-moon-titan-s.webp — 200 — 19.4 KiB — 315 ms — h2https://cdn.discovermagazine.com/assets/image/59097/rotavirus-s.webpcdn.discovermagazine.com/assets/ima... 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https://ad.doubleclick.net/favicon.ico?ad=300x250&ad_box_=1&adnet=1&showad=1&size=250x250&e=0.9127368263803303 — 200 — 129 B — 25 ms — h3https://cd836371f1d.cdn.intergient.com/fb87a4ea41cd836371f1d.cdn.intergient.com/fb87... https://cd836371f1d.cdn.intergient.com/fb87a4ea41 — 200 — 95 B — 32 ms — h2https://ad-delivery.net/px.gif?ch=2&e=0.8739819431175392ad-delivery.net/px.gif?ch=2&e=0.873... https://ad-delivery.net/px.gif?ch=2&e=0.8739819431175392 — 200 — 133 B — 22 ms — h2https://ad.doubleclick.net/favicon.ico?ad=300x250&ad_box_=1&adnet=1&showad=1&size=250x250&e=0.5028577423124213ad.doubleclick.net/favicon.ico?ad=3... https://ad.doubleclick.net/favicon.ico?ad=300x250&ad_box_=1&adnet=1&showad=1&size=250x250&e=0.5028577423124213 — 200 — 129 B — 25 ms — h3https://region1.analytics.google.com/g/collect?v=2&tid=G-EE39KM547B&gtm=45je64h1h1v889322333za20gzb813067043zd813067043&_p=1776806834798&gcd=13l3lPl2l1l1&npa=1&dma_cps=a&dma=1&_eu=AEAAAGQ&ae=a&are=1&cid=735906762.1776806835&frm=0&pscdl=noapi&rcb=3&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=2&tag_exp=0~115938465~115938468~117266401~117384406&sid=1776806835&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=18&tfd=9467region1.analytics.google.com/g/coll... https://region1.analytics.google.com/g/collect?v=2&tid=G-EE39KM547B&gtm=45je64h1h1v889322333za20gzb813067043zd813067043&_p=1776806834798&gcd=13l3lPl2l1l1&npa=1&dma_cps=a&dma=1&_eu=AEAAAGQ&ae=a&are=1&cid=735906762.1776806835&frm=0&pscdl=noapi&rcb=3&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=2&tag_exp=0~115938465~115938468~117266401~117384406&sid=1776806835&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=18&tfd=9467 — 204 — 48 B — 25 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 4907ms · 1591KB · CA$68/mo
Unattributable
Other
Costly
Execution 782ms
Transfer 0 KB
Monthly Cost CA$11/mo
cdn.intergient.com
Other
Costly
Execution 551ms
Transfer 172 KB
Unused 59%
Monthly Cost CA$8/mo
www.discovermagazine.com
Other
Costly
Execution 548ms
Transfer 22 KB
Monthly Cost CA$8/mo
fundingchoicesmessages.google.com
Other
Costly
Execution 464ms
Transfer 107 KB
Monthly Cost CA$6/mo
Google Tag Manager
Tag Manager
Costly
Execution 388ms
Transfer 157 KB
Unused 39%
Monthly Cost CA$5/mo
cdn.p-n.io
Other
Costly
Execution 337ms
Transfer 46 KB
Monthly Cost CA$5/mo
cdn.intergient.com
Other
Costly
Execution 303ms
Transfer 222 KB
Unused 82%
Monthly Cost CA$4/mo
fundingchoicesmessages.google.com
Other
Costly
Execution 207ms
Transfer 70 KB
Unused 52%
Monthly Cost CA$3/mo
securepubads.g.doubleclick.net
Other
Costly
Execution 205ms
Transfer 188 KB
Unused 70%
Monthly Cost CA$3/mo
btloader.com
Other
Optional
Execution 194ms
Transfer 50 KB
Monthly Cost CA$3/mo
Google Tag Manager
Tag Manager
Optional
Execution 186ms
Transfer 134 KB
Unused 47%
Monthly Cost CA$3/mo
cdn.discovermagazine.com
Other
Optional
Execution 182ms
Transfer 87 KB
Unused 48%
Monthly Cost CA$3/mo
olytics.omeda.com
Other
Optional
Execution 139ms
Transfer 71 KB
Unused 66%
Monthly Cost CA$2/mo
c.amazon-adsystem.com
Other
Optional
Execution 108ms
Transfer 91 KB
Unused 41%
Monthly Cost CA$1/mo
cdn.discovermagazine.com
Other
Optional
Execution 102ms
Transfer 4 KB
Monthly Cost CA$1/mo
imasdk.googleapis.com
Other
Optional
Execution 80ms
Transfer 147 KB
Unused 75%
Monthly Cost CA$1/mo
cdn.intergient.com
Other
Optional
Execution 67ms
Transfer 23 KB
Monthly Cost CA$1/mo
securepubads.g.doubleclick.net
Other
Optional
Execution 64ms
Transfer 0 KB
Monthly Cost CA$1/mo

These scripts may cost more than they're worth

  • Unattributable adds 782ms and costs ~CA$11/month
  • cdn.intergient.com adds 551ms and costs ~CA$8/month
  • www.discovermagazine.com adds 548ms and costs ~CA$8/month
  • fundingchoicesmessages.google.com adds 464ms and costs ~CA$6/month
  • Google Tag Manager adds 388ms and costs ~CA$5/month
  • cdn.p-n.io adds 337ms and costs ~CA$5/month
  • cdn.intergient.com adds 303ms and costs ~CA$4/month
  • fundingchoicesmessages.google.com adds 207ms and costs ~CA$3/month
  • securepubads.g.doubleclick.net adds 205ms and costs ~CA$3/month

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

Unattributable takes 782ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

cdn.intergient.com takes 551ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

59% 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

www.discovermagazine.com takes 548ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

fundingchoicesmessages.google.com takes 464ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Google Tag Manager takes 388ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

cdn.p-n.io takes 337ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

cdn.intergient.com takes 303ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

82% 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

fundingchoicesmessages.google.com takes 207ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

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

securepubads.g.doubleclick.net takes 205ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

70% 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

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

75% of imasdk.googleapis.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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