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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
75
GRADE
C
FIX
5
REVIEW
2
PASS
8
INFO
2

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

Mobile Desktop
31
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
89
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
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.

6.04 s

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

13.10 s

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

1.33 s

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

0.077

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

7.84 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.

15.53 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
17
8 PASS 2 REVIEW 5 FIX
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 (2.0 MiB of 2.0 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
4899ms total JS execution
FIX
4899ms total JS execution
Warning::
https://cmp.osano.com/AzZdRbSORDOOzF9W/7d91210e-78...: 1496ms CPU time
Warning::
https://www.dummies.com/: 737ms CPU time
Warning::
Unattributable: 575ms CPU time
Warning::
https://cdnjs.cloudflare.com/ajax/libs/gsap/3.12.2...: 510ms CPU time
Warning::
https://cdn.prod.website-files.com/6630d85d73068bc...: 364ms CPU time
Warning::
Third-party scripts: 4899ms (100% of total)

Main Thread Breakdown

Script Evaluation 54% Other 18% Style & Layout 12% Script Parsing & Compilation 9% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://cmp.osano.com/AzZdRbSORDOOzF9W/7d91210e-7830-4f36-b8d2-0e5b2ea85585/osano.js1496ms1320ms59ms3rd
https://www.dummies.com/737ms26ms0ms3rd
Unattributable575ms103ms0ms3rd
https://cdnjs.cloudflare.com/ajax/libs/gsap/3.12.2/gsap.min.js510ms78ms5ms3rd
https://cdn.prod.website-files.com/6630d85d73068bc09c7c436c/js/dummies-copy-d381c22c758f-6b2bd26adf9c6.5fed1016.1e528231c54491a5.js364ms359ms0ms3rd
https://cdn.prod.website-files.com/6630d85d73068bc09c7c436c/js/dummies-copy-d381c22c758f-6b2bd26adf9c6.schunk.3a4664f04206f51a.js229ms70ms48ms3rd
https://cnstrc.com/js/cust/dummies_ZcRTZy.js155ms126ms25ms3rd
https://cdn.prod.website-files.com/6630d85d73068bc09c7c436c/js/dummies-copy-d381c22c758f-6b2bd26adf9c6.schunk.0be0ff630adfe789.js148ms2ms142ms3rd
https://www.dummies.com/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader.min.js126ms114ms6ms3rd
https://assets.adobedtm.com/59640f9fa510/e21df7600cf6/launch-1bced939ede5.min.js125ms97ms26ms3rd

Showing top 10 of 15 scripts

D
JS Bundles
Action
30 scripts, 495 KB unused
FIX
30 scripts, 495 KB unused
Warning::
https://cdn.prod.website-files.com/6630d85d73068bc...: 134 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=GTM-NM...: 68 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cnstrc.com/js/cust/dummies_ZcRTZy.js: 66 KB unused (68%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-W2QM...: 64 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-54K...: 64 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 495 KB
495 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://cdn.prod.website-files.com/6630d85d73068bc09c7c436c/js/dummies-copy-d381c22c758f-6b2bd26adf9c6.schunk.0be0ff630adfe789.js318 KB134 KB (43%)✓3rd
https://www.googletagmanager.com/gtag/js?id=GTM-NMWRPS132 KB68 KB (51%)✓3rd
https://cnstrc.com/js/cust/dummies_ZcRTZy.js97 KB66 KB (68%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-W2QMK3JYD0155 KB64 KB (42%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-54KKLT6X124 KB64 KB (51%)✓3rd
https://assets.adobedtm.com/59640f9fa510/e21df7600cf6/launch-1bced939ede5.min.js79 KB29 KB (37%)✓3rd
https://cdn.jsdelivr.net/npm/swiper@8/swiper-bundle.min.js40 KB25 KB (63%)✓3rd
https://cdn.prod.website-files.com/6630d85d73068bc09c7c436c/js/dummies-copy-d381c22c758f-6b2bd26adf9c6.schunk.3a4664f04206f51a.js110 KB23 KB (21%)✓3rd
https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js30 KB22 KB (73%)✓3rd
https://d3e54v103j8qbb.cloudfront.net/js/jquery-3.5.1.min.dc5e7f18c8.js?site=6630d85d73068bc09c7c436c31 KB—✓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
65 resources · 2.0 MB · 495 KB savings available
FIX
65 resources · 2.0 MB · 495 KB savings available
Warning::
Page weight 1021 KB over 1MB target
Got: 2.0 MB Expected: ≤ 1 MB
Info::
~495 KB of savings available
Warning::
64 third-party resources (100% of weight)
Info::
1 resources over 200KB
65 resources · 2.0 MiB · 64 third-party 1020.9 KiB over 1MB target
JavaScript 66% · 1.3 MiB
Image 21% · 427.0 KiB
CSS 5% · 92.3 KiB
Font 4% · 86.0 KiB
Document 4% · 78.4 KiB
Other 1% · 11.2 KiB

~495.2 KiB of savings available

Remove unused JavaScript: 495.2 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
Page Weight Budget
Action
2.0 MB transferred, 65 requests
REVIEW
2.0 MB transferred, 65 requests
Info::
Page weighs 7.2 MB (2.0 MB transferred)
Warning::
JavaScript is 1.3 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.3 MB
Info::
65 HTTP requests
Info::
Estimated 0.42 g CO2 per page load
2.0 MB / 2.4 MB budget
2.0 MB transferred
65 requests
0.42 g CO2 per page load
JavaScript 1.3 MiB 66%
Images 425.9 KiB 21%
CSS 92.3 KiB 5%
Fonts 86.0 KiB 4%
HTML 78.4 KiB 4%
Other 10.5 KiB 1%
Other 1.5 KiB 0%
Other 367 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

B
Image Optimization
14 images, 0 KB saveable
REVIEW
14 images, 0 KB saveable
Warning::
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.prod.website-files.com/6630d85d73068bc... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
14 images 426 KB
0 oversized -0 KB
3 legacy format
2 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

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
10 fonts (86 KB)
PASS
10 fonts (86 KB)
Info::
10 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

10

86 KB total

Render-blocking

0

of 10

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 FCP 6.0 s LCP 13.1 shttps://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2memvYaGs126MiZpBA-UvWbX... https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 42.0 KiB — 79 ms — font-display: swaphttps://fonts.gstatic.com/s/opensans/v44/memtYaGs126MiZpBA-UFUIcVXSCEkx2cmqvXlWqWuU6FxZCJgg.woff2memtYaGs126MiZpBA-UFUIc... https://fonts.gstatic.com/s/opensans/v44/memtYaGs126MiZpBA-UFUIcVXSCEkx2cmqvXlWqWuU6FxZCJgg.woff2 — 44.0 KiB — 77 ms — font-display: swaphttps://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2memvYaGs126MiZpBA-UvWbX... https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 0 B — 80 ms — font-display: swaphttps://fonts.gstatic.com/s/opensans/v44/memtYaGs126MiZpBA-UFUIcVXSCEkx2cmqvXlWqWuU6FxZCJgg.woff2memtYaGs126MiZpBA-UFUIc... https://fonts.gstatic.com/s/opensans/v44/memtYaGs126MiZpBA-UFUIcVXSCEkx2cmqvXlWqWuU6FxZCJgg.woff2 — 0 B — 77 ms — font-display: swaphttps://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2memvYaGs126MiZpBA-UvWbX... https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 0 B — 81 ms — font-display: swaphttps://fonts.gstatic.com/s/opensans/v44/memtYaGs126MiZpBA-UFUIcVXSCEkx2cmqvXlWqWuU6FxZCJgg.woff2memtYaGs126MiZpBA-UFUIc... https://fonts.gstatic.com/s/opensans/v44/memtYaGs126MiZpBA-UFUIcVXSCEkx2cmqvXlWqWuU6FxZCJgg.woff2 — 0 B — 77 ms — font-display: swaphttps://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2memvYaGs126MiZpBA-UvWbX... https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 0 B — 80 ms — font-display: swaphttps://fonts.gstatic.com/s/opensans/v44/memtYaGs126MiZpBA-UFUIcVXSCEkx2cmqvXlWqWuU6FxZCJgg.woff2memtYaGs126MiZpBA-UFUIc... https://fonts.gstatic.com/s/opensans/v44/memtYaGs126MiZpBA-UFUIcVXSCEkx2cmqvXlWqWuU6FxZCJgg.woff2 — 0 B — 77 ms — font-display: swaphttps://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2memvYaGs126MiZpBA-UvWbX... https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 0 B — 80 ms — font-display: swaphttps://fonts.gstatic.com/s/opensans/v44/memtYaGs126MiZpBA-UFUIcVXSCEkx2cmqvXlWqWuU6FxZCJgg.woff2memtYaGs126MiZpBA-UFUIc... https://fonts.gstatic.com/s/opensans/v44/memtYaGs126MiZpBA-UFUIcVXSCEkx2cmqvXlWqWuU6FxZCJgg.woff2 — 0 B — 76 ms — font-display: swap
memvYaGs126MiZpBA-UvWbX... woff2 swap
Size 42 KB
Load time 79 ms
Start 630 ms
Risk FOUT — text flashes from fallback to web font
memtYaGs126MiZpBA-UFUIc... woff2 swap
Size 44 KB
Load time 77 ms
Start 630 ms
Risk FOUT — text flashes from fallback to web font
memvYaGs126MiZpBA-UvWbX... woff2 swap
Size 0 KB
Load time 80 ms
Start 631 ms
Risk FOUT — text flashes from fallback to web font
memtYaGs126MiZpBA-UFUIc... woff2 swap
Size 0 KB
Load time 77 ms
Start 631 ms
Risk FOUT — text flashes from fallback to web font
memvYaGs126MiZpBA-UvWbX... woff2 swap
Size 0 KB
Load time 81 ms
Start 631 ms
Risk FOUT — text flashes from fallback to web font
memtYaGs126MiZpBA-UFUIc... woff2 swap
Size 0 KB
Load time 77 ms
Start 631 ms
Risk FOUT — text flashes from fallback to web font
memvYaGs126MiZpBA-UvWbX... woff2 swap
Size 0 KB
Load time 80 ms
Start 631 ms
Risk FOUT — text flashes from fallback to web font
memtYaGs126MiZpBA-UFUIc... woff2 swap
Size 0 KB
Load time 77 ms
Start 631 ms
Risk FOUT — text flashes from fallback to web font
memvYaGs126MiZpBA-UvWbX... woff2 swap
Size 0 KB
Load time 80 ms
Start 631 ms
Risk FOUT — text flashes from fallback to web font
memtYaGs126MiZpBA-UFUIc... woff2 swap
Size 0 KB
Load time 76 ms
Start 632 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
10 hints, 0 missing preconnects
PASS
10 hints, 0 missing preconnects
Info::
Page uses 10 resource hint(s)

Current Resource Hints

preconnect
1
preload
9
dns-prefetch
—
prefetch
—

10 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

Network Waterfall
65 requests over 2205ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s FCP 6.0 s LCP 13.1 shttps://dummies.com// https://dummies.com/ — 301 — 200 B — 64 ms — h2https://www.dummies.com/www.dummies.com/ https://www.dummies.com/ — 200 — 77.1 KiB — 97 ms — h2https://www.dummies.com/cdn-cgi/speculationwww.dummies.com/cdn-cgi/speculation https://www.dummies.com/cdn-cgi/speculation — 200 — 235 B — 24 ms — h2https://cdn.prod.website-files.com/6630d85d73068bc09c7c436c/css/dummies-copy-d381c22c758f-6b2bd26adf9c6.shared.18d94a4dd.min.csscdn.prod.website-files.com/6630d85d... https://cdn.prod.website-files.com/6630d85d73068bc09c7c436c/css/dummies-copy-d381c22c758f-6b2bd26adf9c6.shared.18d94a4dd.min.css — 200 — 84.6 KiB — 142 ms — h3https://cdn.prod.website-files.com/6630d85d73068bc09c7c436c/6630d85d73068bc09c7c4397_logo.d7c063a1.svgcdn.prod.website-files.com/6630d85d... https://cdn.prod.website-files.com/6630d85d73068bc09c7c436c/6630d85d73068bc09c7c4397_logo.d7c063a1.svg — 200 — 7.8 KiB — 87 ms — h3https://cdn.prod.website-files.com/6630d85d73068bc09c7c436c/69e134524798d6447b217362_0e66cbb9970a97d87e123c06b36324fb_solar-panels-home-adobe542531256-hero-d2-p-800.avifcdn.prod.website-files.com/6630d85d... https://cdn.prod.website-files.com/6630d85d73068bc09c7c436c/69e134524798d6447b217362_0e66cbb9970a97d87e123c06b36324fb_solar-panels-home-adobe542531256-hero-d2-p-800.avif — 200 — 20.4 KiB — 345 ms — h3https://cdn.prod.website-files.com/6630d85d73068bc09c7c436c/69e137856a9b28668177933a_solar-power-hero-m-adobe416390749.avifcdn.prod.website-files.com/6630d85d... https://cdn.prod.website-files.com/6630d85d73068bc09c7c436c/69e137856a9b28668177933a_solar-power-hero-m-adobe416390749.avif — 200 — 20.6 KiB — 102 ms — h3https://cdn.prod.website-files.com/6630d85d73068bc09c7c436c/6877a7e85b73c0cfc8a39b14_dummies-ai-home-hero-v2-d-p-800.webpcdn.prod.website-files.com/6630d85d... https://cdn.prod.website-files.com/6630d85d73068bc09c7c436c/6877a7e85b73c0cfc8a39b14_dummies-ai-home-hero-v2-d-p-800.webp — 200 — 8.1 KiB — 350 ms — h3https://cdn.prod.website-files.com/6630d85d73068bc09c7c436c/6846ee70e15756f9351de11e_221d4d3d7475466a0093ce755c20b702_dummies-ai-home-hero-m.webpcdn.prod.website-files.com/6630d85d... https://cdn.prod.website-files.com/6630d85d73068bc09c7c436c/6846ee70e15756f9351de11e_221d4d3d7475466a0093ce755c20b702_dummies-ai-home-hero-m.webp — 200 — 20.5 KiB — 82 ms — h3https://cdn.jsdelivr.net/npm/swiper@8/swiper-bundle.min.csscdn.jsdelivr.net/npm/swiper@8/swipe... https://cdn.jsdelivr.net/npm/swiper@8/swiper-bundle.min.css — 200 — 4.9 KiB — 33 ms — h2https://www.dummies.com/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader.min.jswww.dummies.com/cdn-cgi/scripts/7d0... https://www.dummies.com/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader.min.js — 200 — 4.0 KiB — 22 ms — 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h2https://cdn.prod.website-files.com/62b354a95089d372e602aace/62b354a95089d313a302aaef_x-2-rotation.jsoncdn.prod.website-files.com/62b354a9... https://cdn.prod.website-files.com/62b354a95089d372e602aace/62b354a95089d313a302aaef_x-2-rotation.json — 200 — 1.2 KiB — 28 ms — h3https://cdn.jsdelivr.net/npm/@finsweet/attributes-cmscore@1/cmscore.jscdn.jsdelivr.net/npm/@finsweet/attr... https://cdn.jsdelivr.net/npm/@finsweet/attributes-cmscore@1/cmscore.js — 200 — 7.9 KiB — 3 ms — h3https://cmp.osano.com/AzZdRbSORDOOzF9W/7d91210e-7830-4f36-b8d2-0e5b2ea85585/en.jsoncmp.osano.com/AzZdRbSORDOOzF9W/7d91... https://cmp.osano.com/AzZdRbSORDOOzF9W/7d91210e-7830-4f36-b8d2-0e5b2ea85585/en.json — 200 — 9.3 KiB — 20 ms — h3https://ac.cnstrc.com/behavior?action=session_start&c=ciojs-2.1401.2&i=d8f6a876-8e31-4b57-941b-6ff83fe1ba79&s=1&key=key_zKUjl9WLTH6sfN5a&canonical_url=https%3A%2F%2Fwww.dummies.com%2F&origin_referrer=www.dummies.com%2F&_dt=1776819921942ac.cnstrc.com/behavior?action=sessi... https://ac.cnstrc.com/behavior?action=session_start&c=ciojs-2.1401.2&i=d8f6a876-8e31-4b57-941b-6ff83fe1ba79&s=1&key=key_zKUjl9WLTH6sfN5a&canonical_url=https%3A%2F%2Fwww.dummies.com%2F&origin_referrer=www.dummies.com%2F&_dt=1776819921942 — 204 — 367 B — 137 ms — h2https://cdn.prod.website-files.com/6634a8f8dd9b2a63c9e6be83/69c2a2ea6f751fa56bc95374_2026-2027-asvab-for-dummies-cover-9781394401871.webpcdn.prod.website-files.com/6634a8f8... https://cdn.prod.website-files.com/6634a8f8dd9b2a63c9e6be83/69c2a2ea6f751fa56bc95374_2026-2027-asvab-for-dummies-cover-9781394401871.webp — 200 — 17.5 KiB — 24 ms — h3https://assets.adobedtm.com/59640f9fa510/e21df7600cf6/25aa4516f908/RC13d20d8bc425471496eb04313731421f-source.min.jsassets.adobedtm.com/59640f9fa510/e2... https://assets.adobedtm.com/59640f9fa510/e21df7600cf6/25aa4516f908/RC13d20d8bc425471496eb04313731421f-source.min.js — 200 — 666 B — 3 ms — h2https://www.googletagmanager.com/gtag/js?id=GTM-NMWRPSwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=GTM-NMWRPS — 200 — 131.6 KiB — 43 ms — h2https://assets.adobedtm.com/59640f9fa510/e21df7600cf6/25aa4516f908/RC82d0e6f5afce46e5bf8e51dc8e2bce1b-source.min.jsassets.adobedtm.com/59640f9fa510/e2... https://assets.adobedtm.com/59640f9fa510/e21df7600cf6/25aa4516f908/RC82d0e6f5afce46e5bf8e51dc8e2bce1b-source.min.js — 200 — 743 B — 3 ms — h2https://assets.adobedtm.com/59640f9fa510/e21df7600cf6/25aa4516f908/RC69673876aaf84dfdb979e009d191c6bc-source.min.jsassets.adobedtm.com/59640f9fa510/e2... https://assets.adobedtm.com/59640f9fa510/e21df7600cf6/25aa4516f908/RC69673876aaf84dfdb979e009d191c6bc-source.min.js — 200 — 666 B — 3 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 4899ms · 1238KB · €78/mo
cmp.osano.com
Other
Costly
Execution 1496ms
Transfer 58 KB
Monthly Cost €24/mo
www.dummies.com
Other
Costly
Execution 737ms
Transfer 77 KB
Monthly Cost €12/mo
Unattributable
Other
Costly
Execution 575ms
Transfer 0 KB
Monthly Cost €9/mo
cdnjs
CDN
Costly
Execution 510ms
Transfer 25 KB
Monthly Cost €8/mo
cdn.prod.website-files.com
Other
Costly
Execution 364ms
Transfer 2 KB
Monthly Cost €6/mo
cdn.prod.website-files.com
Other
Costly
Execution 229ms
Transfer 110 KB
Unused 21%
Monthly Cost €4/mo
cnstrc.com
Other
Optional
Execution 155ms
Transfer 97 KB
Unused 68%
Monthly Cost €2/mo
cdn.prod.website-files.com
Other
Optional
Execution 148ms
Transfer 318 KB
Unused 43%
Monthly Cost €2/mo
www.dummies.com
Other
Optional
Execution 126ms
Transfer 4 KB
Monthly Cost €2/mo
assets.adobedtm.com
Other
Optional
Execution 125ms
Transfer 79 KB
Unused 37%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 104ms
Transfer 124 KB
Unused 51%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 102ms
Transfer 155 KB
Unused 42%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 85ms
Transfer 132 KB
Unused 51%
Monthly Cost €1/mo
jsDelivr
CDN
Optional
Execution 80ms
Transfer 18 KB
Monthly Cost €1/mo
jsDelivr
CDN
Optional
Execution 62ms
Transfer 40 KB
Unused 63%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • cmp.osano.com adds 1496ms and costs ~€24/month
  • www.dummies.com adds 737ms and costs ~€12/month
  • Unattributable adds 575ms and costs ~€9/month
  • cdnjs adds 510ms and costs ~€8/month
  • cdn.prod.website-files.com adds 364ms and costs ~€6/month
  • cdn.prod.website-files.com adds 229ms and costs ~€4/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

cmp.osano.com takes 1496ms 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

www.dummies.com takes 737ms 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

Unattributable takes 575ms 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

cdnjs takes 510ms 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.prod.website-files.com takes 364ms 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.prod.website-files.com takes 229ms 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

68% of cnstrc.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

51% of Google Tag Manager'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

51% of Google Tag Manager'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

63% of jsDelivr'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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