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https://interestingengineering.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
73
GRADE
C
FIX
4
REVIEW
1
PASS
10
INFO
2

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

Mobile Desktop
27
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
95
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
69
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.

3.15 s

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

36.65 s

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

5.75 s

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

0.099

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

13.67 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.

44.78 s

Page Load Progression

805 ms
1.6 s
2.4 s
3.2 s
4.0 s
4.8 s
5.6 s
6.4 s
Checks
17
10 PASS 1 REVIEW 4 FIX
F
Page Weight Budget
Action
18.7 MB transferred, 197 requests
FIX
18.7 MB transferred, 197 requests
Critical::
Page weighs 26.1 MB (18.7 MB transferred)
Warning::
Images are 15.8 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 15.8 MB
Warning::
JavaScript is 2.5 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.5 MB
Warning::
197 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 3.9 g CO2 per page load
18.7 MB / 2.4 MB budget
18.7 MB transferred
197 requests
3.9 g CO2 per page load
Images 15.8 MiB 85%
JavaScript 2.5 MiB 14%
Fonts 180.3 KiB 1%
HTML 89.0 KiB 0%
Other 26.8 KiB 0%
Other 26.3 KiB 0%
Other 12.7 KiB 0%
CSS 2.5 KiB 0%
Other 622 B 0%
Other 464 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

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

F
JS Execution Cost
Action
20090ms total JS execution
FIX
20090ms total JS execution
Warning::
Unattributable: 3184ms CPU time
Warning::
https://interestingengineering.com/_next/static/ch...: 3031ms CPU time
Warning::
https://interestingengineering.com/: 2065ms CPU time
Warning::
https://cdn.consentmanager.net/delivery/customdata...: 1396ms CPU time
Warning::
https://ads.adthrive.com/builds/core/ef1e10d/es201...: 1294ms CPU time
Warning::
Third-party scripts: 14094ms (70% of total)

Main Thread Breakdown

Script Evaluation 63% Other 15% Style & Layout 9% Script Parsing & Compilation 7%
ScriptTotalScriptingParse/CompileParty
Unattributable3184ms559ms0ms3rd
https://interestingengineering.com/_next/static/chunks/107yos3u0uadk.js3031ms2564ms35ms1st
https://interestingengineering.com/2065ms145ms67ms1st
https://cdn.consentmanager.net/delivery/customdata/bV8xLndfODY2ODUucl9HRFBSLmxfZW4uZF8zNDc0Mi54XzEwMi52LnAudF8zNDc0Mi54dF8xNTA.js1396ms1241ms15ms3rd
https://ads.adthrive.com/builds/core/ef1e10d/es2018/js/adthrive.min.js?deployment=2026-04-21-09:rpsc-781:ef1e10d:4&bucket=flex-53&deliveryFeatures=additiveRaptiveFloors,altsdm,altv2,amazonBetaApstag,consentManagerCMP,cv2,dlc,es2021,hb_crid,i262,ld,nvc,ok,pbis,raptiveFloors,raptiveManualCookieSync,recencyFrequency,reissuingSticky,removeAdHost,rpbsecs,rpr,rrassf,stickyBucketsLocalStorage,stickyV2,switzerlandGdpr,trafficShaping,usdk,prebidLoad,gptLoad,amazonLoad,ttdSync&siteid=6661dd7712e1ac035b611f891294ms971ms243ms3rd
https://js.hs-analytics.net/analytics/1776812700000/47062935.js1174ms835ms17ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-WKW2TKP965ms807ms88ms3rd
https://ads.adthrive.com/sites/6661dd7712e1ac035b611f89/ads.min.js?referrer=https%3A%2F%2Finterestingengineering.com%2F&cb=61628ms410ms21ms3rd
https://ads.adthrive.com/builds/core/ef1e10d/gdpr/vendor/prebid/es2018/prebid.min.js543ms364ms79ms3rd
https://www.googletagmanager.com/gtag/js?id=G-0Y8RGJWRV7&cx=c&gtm=4e64h1543ms447ms86ms3rd

Showing top 10 of 31 scripts

F
JS Bundles
Action
58 scripts, 789 KB unused
FIX
58 scripts, 789 KB unused
Warning::
https://ads.adthrive.com/builds/core/ef1e10d/es201...: 160 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 131 KB unused (70%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://ads.adthrive.com/builds/core/ef1e10d/gdpr/...: 126 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-0Y8R...: 69 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-7BEH...: 65 KB unused (37%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 789 KB
789 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://ads.adthrive.com/builds/core/ef1e10d/es2018/js/adthrive.min.js?deployment=2026-04-21-09:rpsc-781:ef1e10d:4&bucket=flex-53&deliveryFeatures=additiveRaptiveFloors,altsdm,altv2,amazonBetaApstag,consentManagerCMP,cv2,dlc,es2021,hb_crid,i262,ld,nvc,ok,pbis,raptiveFloors,raptiveManualCookieSync,recencyFrequency,reissuingSticky,removeAdHost,rpbsecs,rpr,rrassf,stickyBucketsLocalStorage,stickyV2,switzerlandGdpr,trafficShaping,usdk,prebidLoad,gptLoad,amazonLoad,ttdSync&siteid=6661dd7712e1ac035b611f89369 KB160 KB (44%)✓3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js?cb=31097945188 KB131 KB (70%)✓3rd
https://ads.adthrive.com/builds/core/ef1e10d/gdpr/vendor/prebid/es2018/prebid.min.js175 KB126 KB (72%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-0Y8RGJWRV7&cx=c&gtm=4e64h1173 KB69 KB (40%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-7BEHH4VG6K&cx=c&gtm=4e64h1176 KB65 KB (37%)✓3rd
https://interestingengineering.com/_next/static/chunks/119uhjrnv1x.4.js74 KB57 KB (87%)✓1st
https://www.googletagmanager.com/gtm.js?id=GTM-WKW2TKP155 KB47 KB (38%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KZVMHRW9136 KB44 KB (41%)✓3rd
https://cdn.consentmanager.net/delivery/js/cmp_final.min.js101 KB36 KB (36%)✓3rd
https://connect.facebook.net/en_US/fbevents.js97 KB33 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

D
Page Weight Inventory
Action
197 resources · 18.7 MB · 789 KB savings available
FIX
197 resources · 18.7 MB · 789 KB savings available
Warning::
Page weight 17.7 MB over 1MB target
Got: 18.7 MB Expected: ≤ 1 MB
Info::
~789 KB of savings available
Info::
85 third-party resources (15% of weight)
Info::
17 resources over 200KB
197 resources · 18.7 MiB · 85 third-party 17.7 MiB over 1MB target
Image 85% · 15.8 MiB
JavaScript 14% · 2.5 MiB
Font 1% · 180.3 KiB
Document 0% · 90.1 KiB
Other 0% · 59.3 KiB
CSS 0% · 2.5 KiB

~789.1 KiB of savings available

Remove unused JavaScript: 789.1 KiB
B
Image Optimization
61 images, 0 KB saveable
REVIEW
61 images, 0 KB saveable
Info::
All images are well-optimized
61 images 15.8 MB
0 oversized -0 KB
55 legacy format
0 missing dimensions CLS risk
A+
Third-Party Impact
15% third-party, 0 ms blocking
PASS
15% third-party, 0 ms blocking
Info::
Third-party code accounts for 15% of page weight (2.9 MiB of 18.7 MiB)
Info::
Third-party blocking time is low (0 ms)
85%
15%
First-party Third-party
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
7 fonts (180 KB)
PASS
7 fonts (180 KB)
Info::
7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

7

180 KB total

Render-blocking

0

of 7

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s 34.0 s 36.0 s 38.0 s FCP 3.1 s LCP 36.6 shttps://interestingengineering.com/_next/static/media/303804218d80822e-s.p.11p_15xsjt-ie.woff2303804218d80822e-s.p.11... https://interestingengineering.com/_next/static/media/303804218d80822e-s.p.11p_15xsjt-ie.woff2 — 15.5 KiB — 49 ms — font-display: swaphttps://interestingengineering.com/_next/static/media/4f530f52d514af96-s.p.0aapj9pyt9oam.woff24f530f52d514af96-s.p.0a... https://interestingengineering.com/_next/static/media/4f530f52d514af96-s.p.0aapj9pyt9oam.woff2 — 14.6 KiB — 49 ms — font-display: swaphttps://interestingengineering.com/_next/static/media/612838607db3d51d-s.p.0yvdtz6_qans-.woff2612838607db3d51d-s.p.0y... https://interestingengineering.com/_next/static/media/612838607db3d51d-s.p.0yvdtz6_qans-.woff2 — 14.6 KiB — 47 ms — font-display: swaphttps://interestingengineering.com/_next/static/media/83afe278b6a6bb3c-s.p.0q-301v4kxxnr.woff283afe278b6a6bb3c-s.p.0q... https://interestingengineering.com/_next/static/media/83afe278b6a6bb3c-s.p.0q-301v4kxxnr.woff2 — 47.6 KiB — 48 ms — font-display: swaphttps://interestingengineering.com/_next/static/media/b4e85636e2ca4056-s.p.0c3c6tp9xl371.woff2b4e85636e2ca4056-s.p.0c... https://interestingengineering.com/_next/static/media/b4e85636e2ca4056-s.p.0c3c6tp9xl371.woff2 — 36.1 KiB — 50 ms — font-display: swaphttps://interestingengineering.com/_next/static/media/ce62453a442c7f35-s.p.0333ktddfbsxy.woff2ce62453a442c7f35-s.p.03... https://interestingengineering.com/_next/static/media/ce62453a442c7f35-s.p.0333ktddfbsxy.woff2 — 36.9 KiB — 51 ms — font-display: swaphttps://interestingengineering.com/_next/static/media/d9b5d46d9a89ffe6-s.p.0agk34fg-1.z0.woff2d9b5d46d9a89ffe6-s.p.0a... https://interestingengineering.com/_next/static/media/d9b5d46d9a89ffe6-s.p.0agk34fg-1.z0.woff2 — 14.8 KiB — 51 ms — font-display: swap
303804218d80822e-s.p.11... woff2 swap
Size 15 KB
Load time 49 ms
Start 63 ms
Risk FOUT — text flashes from fallback to web font
4f530f52d514af96-s.p.0a... woff2 swap
Size 15 KB
Load time 49 ms
Start 64 ms
Risk FOUT — text flashes from fallback to web font
612838607db3d51d-s.p.0y... woff2 swap
Size 15 KB
Load time 47 ms
Start 64 ms
Risk FOUT — text flashes from fallback to web font
83afe278b6a6bb3c-s.p.0q... woff2 swap
Size 48 KB
Load time 48 ms
Start 64 ms
Risk FOUT — text flashes from fallback to web font
b4e85636e2ca4056-s.p.0c... woff2 swap
Size 36 KB
Load time 50 ms
Start 65 ms
Risk FOUT — text flashes from fallback to web font
ce62453a442c7f35-s.p.03... woff2 swap
Size 37 KB
Load time 51 ms
Start 65 ms
Risk FOUT — text flashes from fallback to web font
d9b5d46d9a89ffe6-s.p.0a... woff2 swap
Size 15 KB
Load time 51 ms
Start 65 ms
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
38 hints, 0 missing preconnects
PASS
38 hints, 0 missing preconnects
Info::
Page uses 38 resource hint(s)

Current Resource Hints

preconnect
5
preload
+18
28
dns-prefetch
5
prefetch
—

38 resource hints configured

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
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

A
HTTP Caching
max-age=300 (5 minutes)
PASS
max-age=300 (5 minutes)
Info::
Cache-Control header is set
Got: public, max-age=300, must-revalidate
Info::
Effective TTL: 5 minutes (max-age=300)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

public, max-age=300, must-revalidate

DirectiveValueMeaning
public—Any cache may store this response
max-age300Cache for 5 minutes
must-revalidate—Must recheck with server after expiry
Effective TTL: 300 seconds
Network Waterfall
197 requests over 7206ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s 30.0 s 32.0 s 34.0 s 36.0 s 38.0 s FCP 3.1 s LCP 36.6 shttps://interestingengineering.com// https://interestingengineering.com/ — 200 — 89.0 KiB — 57 ms — h3https://interestingengineering.com/cdn-cgi/speculation/cdn-cgi/speculation https://interestingengineering.com/cdn-cgi/speculation — 200 — 293 B — 14 ms — h3https://interestingengineering.com/_next/static/media/303804218d80822e-s.p.11p_15xsjt-ie.woff2/_next/static/media/303804218d80822... https://interestingengineering.com/_next/static/media/303804218d80822e-s.p.11p_15xsjt-ie.woff2 — 200 — 15.5 KiB — 49 ms — h3https://interestingengineering.com/_next/static/media/4f530f52d514af96-s.p.0aapj9pyt9oam.woff2/_next/static/media/4f530f52d514af9... https://interestingengineering.com/_next/static/media/4f530f52d514af96-s.p.0aapj9pyt9oam.woff2 — 200 — 14.6 KiB — 49 ms — h3https://interestingengineering.com/_next/static/media/612838607db3d51d-s.p.0yvdtz6_qans-.woff2/_next/static/media/612838607db3d51... https://interestingengineering.com/_next/static/media/612838607db3d51d-s.p.0yvdtz6_qans-.woff2 — 200 — 14.6 KiB — 47 ms — h3https://interestingengineering.com/_next/static/media/83afe278b6a6bb3c-s.p.0q-301v4kxxnr.woff2/_next/static/media/83afe278b6a6bb3... https://interestingengineering.com/_next/static/media/83afe278b6a6bb3c-s.p.0q-301v4kxxnr.woff2 — 200 — 47.6 KiB — 48 ms — h3https://interestingengineering.com/_next/static/media/b4e85636e2ca4056-s.p.0c3c6tp9xl371.woff2/_next/static/media/b4e85636e2ca405... https://interestingengineering.com/_next/static/media/b4e85636e2ca4056-s.p.0c3c6tp9xl371.woff2 — 200 — 36.1 KiB — 50 ms — h3https://interestingengineering.com/_next/static/media/ce62453a442c7f35-s.p.0333ktddfbsxy.woff2/_next/static/media/ce62453a442c7f3... https://interestingengineering.com/_next/static/media/ce62453a442c7f35-s.p.0333ktddfbsxy.woff2 — 200 — 36.9 KiB — 51 ms — h3https://interestingengineering.com/_next/static/media/d9b5d46d9a89ffe6-s.p.0agk34fg-1.z0.woff2/_next/static/media/d9b5d46d9a89ffe... https://interestingengineering.com/_next/static/media/d9b5d46d9a89ffe6-s.p.0agk34fg-1.z0.woff2 — 200 — 14.8 KiB — 51 ms — h3https://interestingengineering.com/_next/static/chunks/0skwb7st_o0_z.css/_next/static/chunks/0skwb7st_o0_z.... https://interestingengineering.com/_next/static/chunks/0skwb7st_o0_z.css — 200 — 0 B — 42 ms — h3https://interestingengineering.com/_next/static/chunks/0dgx0vtj.doyr.css/_next/static/chunks/0dgx0vtj.doyr.... https://interestingengineering.com/_next/static/chunks/0dgx0vtj.doyr.css — 200 — 0 B — 22 ms — h3https://interestingengineering.com/_next/static/chunks/06muz3cuqvof0.css/_next/static/chunks/06muz3cuqvof0.... https://interestingengineering.com/_next/static/chunks/06muz3cuqvof0.css — 200 — 0 B — 57 ms — h3https://interestingengineering.com/_next/static/chunks/0aw812u54betd.css/_next/static/chunks/0aw812u54betd.... https://interestingengineering.com/_next/static/chunks/0aw812u54betd.css — 200 — 0 B — 44 ms — h3https://interestingengineering.com/_next/static/chunks/0su25478~5qk5.css/_next/static/chunks/0su25478~5qk5.... https://interestingengineering.com/_next/static/chunks/0su25478~5qk5.css — 200 — 0 B — 45 ms — h3https://interestingengineering.com/_next/static/chunks/0p8ac14s1nrf9.css/_next/static/chunks/0p8ac14s1nrf9.... https://interestingengineering.com/_next/static/chunks/0p8ac14s1nrf9.css — 200 — 0 B — 47 ms — h3https://interestingengineering.com/_next/image?url=https%3A%2F%2Fcms.interestingengineering.com%2Fwp-content%2Fuploads%2F2026%2F04%2FIE-Photo-71-1.jpg&w=750&q=75/_next/image?url=https%3A%2F%2Fcms.... https://interestingengineering.com/_next/image?url=https%3A%2F%2Fcms.interestingengineering.com%2Fwp-content%2Fuploads%2F2026%2F04%2FIE-Photo-71-1.jpg&w=750&q=75 — 200 — 216.4 KiB — 72 ms — h3https://interestingengineering.com/_next/static/chunks/0u4xrb4e05ypi.css/_next/static/chunks/0u4xrb4e05ypi.... https://interestingengineering.com/_next/static/chunks/0u4xrb4e05ypi.css — 200 — 1.5 KiB — 26 ms — h3https://cdn.p-n.io/pushly-sdk.min.js?domain_key=2lGk6df1rSYyOtl0K802tDONHmW3wgIpo68Zcdn.p-n.io/pushly-sdk.min.js?domain... https://cdn.p-n.io/pushly-sdk.min.js?domain_key=2lGk6df1rSYyOtl0K802tDONHmW3wgIpo68Z — 200 — 45.9 KiB — 67 ms — h2https://interestingengineering.com/js/recovery.js/js/recovery.js https://interestingengineering.com/js/recovery.js — 200 — 3.9 KiB — 305 ms — h3https://interestingengineering.com/js/gapw-init.js/js/gapw-init.js https://interestingengineering.com/js/gapw-init.js — 200 — 2.1 KiB — 328 ms — h3https://experiments.parsely.com/vip-experiments.js?apiKey=interestingengineering.comexperiments.parsely.com/vip-experim... https://experiments.parsely.com/vip-experiments.js?apiKey=interestingengineering.com — 200 — 8.9 KiB — 63 ms — 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https://region1.analytics.google.com/g/collect?v=2&tid=G-7BEHH4VG6K&gtm=45je64h1v9178695854z8890886228za20gzb890886228zd890886228&_p=1776812782469&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&tcfd=10001&ecid=449299298&_eu=AAAAAGQ&are=1&cid=1976903029.1776812785&frm=0&pscdl=noapi&rcb=5&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&gaf=2&_s=2&tag_exp=0~115938465~115938469~117266400~118463262&dp=%2F&sid=1776812784&sct=1&seg=0&dl=https%3A%2F%2Finterestingengineering.com%2F&dt=Interesting%20Engineering%20%7C%20Engineering%2C%20Tech%20and%20Science%20News&en=ad_blocker_detection&ep.category=Ad%20Blocker&ep.action=Not%20Detected&ep.label=%2F&ep.ad_block_status=disabled&_et=1439&tfd=5225 — 204 — 20 B — 19 ms — h3https://region1.google-analytics.com/g/collect?v=2&tid=G-7BEHH4VG6K&gtm=45je64h1v9178695854z8890886228za20gzb890886228zd890886228&_p=1776812782469&gcs=G100&gcd=13p3p3p2p5l1&npa=1&dma_cps=-&dma=1&tcfd=1000h&gdid=dMzk4MW&ecid=944279854&_eu=AAAAAGA&are=1&cid=902922071.1776812787&frm=0&pscdl=denied&rcb=5&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&gaf=2&_s=3&tag_exp=0~115938465~115938469~117266400~118463262&sid=1776812787&sct=1&seg=0&dl=https%3A%2F%2Finterestingengineering.com%2F&dt=Interesting%20Engineering%20%7C%20Engineering%2C%20Tech%20and%20Science%20News&en=page_load_time&_fv=1&_nsi=1&_ss=1&epn.loading_time_sec=5.05&tfd=5226region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-7BEHH4VG6K&gtm=45je64h1v9178695854z8890886228za20gzb890886228zd890886228&_p=1776812782469&gcs=G100&gcd=13p3p3p2p5l1&npa=1&dma_cps=-&dma=1&tcfd=1000h&gdid=dMzk4MW&ecid=944279854&_eu=AAAAAGA&are=1&cid=902922071.1776812787&frm=0&pscdl=denied&rcb=5&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&gaf=2&_s=3&tag_exp=0~115938465~115938469~117266400~118463262&sid=1776812787&sct=1&seg=0&dl=https%3A%2F%2Finterestingengineering.com%2F&dt=Interesting%20Engineering%20%7C%20Engineering%2C%20Tech%20and%20Science%20News&en=page_load_time&_fv=1&_nsi=1&_ss=1&epn.loading_time_sec=5.05&tfd=5226 — 204 — 290 B — 22 ms — h2https://securepubads.g.doubleclick.net/pagead/managed/dict/m202604210101/gptsecurepubads.g.doubleclick.net/page... https://securepubads.g.doubleclick.net/pagead/managed/dict/m202604210101/gpt — 200 — 23.0 KiB — 8 ms — h3https://id5-sync.com/bounceid5-sync.com/bounce https://id5-sync.com/bounce — 200 — 534 B — 13 ms — h2https://lbs.eu-1-id5-sync.com/lbs/v1lbs.eu-1-id5-sync.com/lbs/v1 https://lbs.eu-1-id5-sync.com/lbs/v1 — 200 — 171 B — 41 ms — h2https://lb.eu-1-id5-sync.com/lb/v1lb.eu-1-id5-sync.com/lb/v1 https://lb.eu-1-id5-sync.com/lb/v1 — 200 — 336 B — 42 ms — h2https://id5-sync.com/gm/v3id5-sync.com/gm/v3 https://id5-sync.com/gm/v3 — 200 — 850 B — 14 ms — h2https://pagead2.googlesyndication.com/pagead/ping?e=1pagead2.googlesyndication.com/pagea... https://pagead2.googlesyndication.com/pagead/ping?e=1 — 204 — 20 B — 22 ms — h3https://h.clarity.ms/collecth.clarity.ms/collect https://h.clarity.ms/collect — 204 — 290 B — 91 ms — http/1.1
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
70% of JavaScript execution is third-party
First-party Third-party 14094ms · 2165KB · €153/mo
Unattributable
Other
Costly
Execution 3184ms
Transfer 0 KB
Monthly Cost €35/mo
cdn.consentmanager.net
Other
Costly
Execution 1396ms
Transfer 22 KB
Monthly Cost €15/mo
ads.adthrive.com
Other
Costly
Execution 1294ms
Transfer 369 KB
Unused 44%
Monthly Cost €14/mo
HubSpot Analytics
Analytics
Costly
Execution 1174ms
Transfer 42 KB
Monthly Cost €13/mo
Google Tag Manager
Tag Manager
Costly
Execution 965ms
Transfer 155 KB
Unused 38%
Monthly Cost €10/mo
ads.adthrive.com
Other
Costly
Execution 628ms
Transfer 35 KB
Monthly Cost €7/mo
ads.adthrive.com
Other
Costly
Execution 543ms
Transfer 175 KB
Unused 72%
Monthly Cost €6/mo
Google Tag Manager
Tag Manager
Costly
Execution 543ms
Transfer 173 KB
Unused 40%
Monthly Cost €6/mo
Google Tag Manager
Tag Manager
Costly
Execution 536ms
Transfer 176 KB
Unused 37%
Monthly Cost €6/mo
cdn.p-n.io
Other
Costly
Execution 528ms
Transfer 46 KB
Monthly Cost €6/mo
securepubads.g.doubleclick.net
Other
Costly
Execution 517ms
Transfer 188 KB
Unused 70%
Monthly Cost €6/mo
Google Tag Manager
Tag Manager
Costly
Execution 432ms
Transfer 146 KB
Monthly Cost €5/mo
Facebook Pixel
Advertising
Costly
Execution 353ms
Transfer 97 KB
Unused 34%
Monthly Cost €4/mo
Microsoft Clarity
Session Replay
Costly
Execution 296ms
Transfer 26 KB
Monthly Cost €3/mo
Facebook Pixel
Advertising
Costly
Execution 277ms
Transfer 45 KB
Monthly Cost €3/mo
c.aps.amazon-adsystem.com
Other
Costly
Execution 221ms
Transfer 78 KB
Monthly Cost €2/mo
securepubads.g.doubleclick.net
Other
Costly
Execution 200ms
Transfer 34 KB
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 184ms
Transfer 136 KB
Unused 41%
Monthly Cost €2/mo
cdn.id5-sync.com
Other
Optional
Execution 156ms
Transfer 30 KB
Monthly Cost €2/mo
js.hscollectedforms.net
Other
Optional
Execution 149ms
Transfer 26 KB
Monthly Cost €2/mo
cdn.consentmanager.net
Other
Optional
Execution 126ms
Transfer 101 KB
Unused 36%
Monthly Cost €1/mo
LinkedIn Insight
Advertising
Optional
Execution 116ms
Transfer 19 KB
Monthly Cost €1/mo
cdn.parsely.com
Other
Optional
Execution 111ms
Transfer 21 KB
Monthly Cost €1/mo
static.cloudflareinsights.com
Other
Optional
Execution 108ms
Transfer 11 KB
Monthly Cost €1/mo
Facebook Pixel
Advertising
Optional
Execution 55ms
Transfer 16 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 3184ms and costs ~€35/month
  • cdn.consentmanager.net adds 1396ms and costs ~€15/month
  • ads.adthrive.com adds 1294ms and costs ~€14/month
  • HubSpot Analytics adds 1174ms and costs ~€13/month
  • Google Tag Manager adds 965ms and costs ~€10/month
  • ads.adthrive.com adds 628ms and costs ~€7/month
  • ads.adthrive.com adds 543ms and costs ~€6/month
  • Google Tag Manager adds 543ms and costs ~€6/month
  • Google Tag Manager adds 536ms and costs ~€6/month
  • cdn.p-n.io adds 528ms and costs ~€6/month
  • securepubads.g.doubleclick.net adds 517ms and costs ~€6/month
  • Google Tag Manager adds 432ms and costs ~€5/month
  • Facebook Pixel adds 353ms and costs ~€4/month
  • Microsoft Clarity adds 296ms and costs ~€3/month
  • Facebook Pixel adds 277ms and costs ~€3/month
  • c.aps.amazon-adsystem.com adds 221ms and costs ~€2/month
  • securepubads.g.doubleclick.net adds 200ms and costs ~€2/month

70% 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 3184ms 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.consentmanager.net takes 1396ms 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

ads.adthrive.com takes 1294ms 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

HubSpot Analytics takes 1174ms 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 965ms 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

ads.adthrive.com takes 628ms 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

ads.adthrive.com takes 543ms 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

72% of ads.adthrive.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

Google Tag Manager takes 543ms 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 536ms 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 528ms 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

securepubads.g.doubleclick.net takes 517ms 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

Google Tag Manager takes 432ms 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

Facebook Pixel takes 353ms 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

Microsoft Clarity takes 296ms 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

Facebook Pixel takes 277ms 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

c.aps.amazon-adsystem.com takes 221ms 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

securepubads.g.doubleclick.net takes 200ms 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

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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