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https://www.nordvpn.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
86
GRADE
B
FIX
1
REVIEW
3
PASS
8
INFO
2

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

Mobile Desktop
93
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
91
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.
92
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.

1.02 s

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

1.48 s

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

0 ms

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

0.006

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

1.02 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.

1.48 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
14
8 PASS 3 REVIEW 1 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 (877.3 KiB of 878.0 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
B
Image Optimization
12 images, 0 KB saveable
REVIEW
12 images, 0 KB saveable
Info::
All images are well-optimized
12 images 164 KB
0 oversized -0 KB
4 legacy format
0 missing dimensions CLS risk
B
JS Execution Cost
816ms total JS execution
REVIEW
816ms total JS execution
Warning::
https://nordvpn.com/: 622ms CPU time
Info::
Unattributable: 137ms CPU time
Info::
https://nordvpn.com/cc/: 56ms CPU time
Warning::
Third-party scripts: 816ms (100% of total)

Main Thread Breakdown

Other 45% Style & Layout 20% Script Evaluation 19% Rendering 9%
ScriptTotalScriptingParse/CompileParty
https://nordvpn.com/622ms46ms2ms3rd
Unattributable137ms6ms0ms3rd
https://nordvpn.com/cc/56ms39ms14ms3rd
B
JS Bundles
40 scripts, 70 KB unused
REVIEW
40 scripts, 70 KB unused
Warning::
https://nordvpn.com/cc/: 70 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 70 KB
70 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://nordvpn.com/cc/176 KB70 KB (40%)✓3rd
https://nordvpn.com/static/constants.DK5GWugY.js1 KB—✓3rd
https://nordvpn.com/static/getCookieValue.BAKycxQw.js1 KB—✓3rd
https://nordvpn.com/static/Base.astro_astro_type_script_index_0_lang.DI-7jF0c.js1 KB—✓3rd
https://nordvpn.com/static/Tracy.astro_astro_type_script_index_0_lang.BGG1roXS.js3 KB—✓3rd
https://nordvpn.com/static/Typography.astro_astro_type_script_index_0_lang.Ds8gm9zL.js2 KB—✓3rd
https://nordvpn.com/static/Script.astro_astro_type_script_index_0_lang.Cop7Qfos.js1 KB—✓3rd
https://nordvpn.com/static/Section.astro_astro_type_script_index_0_lang.Bzz070xq.js1 KB—✓3rd
https://nordvpn.com/static/Base.astro_astro_type_script_index_0_lang.CwMAZhEC.js3 KB—✓3rd
https://nordvpn.com/static/Script.astro_astro_type_script_index_0_lang.Dm6JX4GQ.js1 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

A
Page Weight Budget
878 KB transferred, 73 requests
PASS
878 KB transferred, 73 requests
Info::
Page weighs 2.2 MB (878 KB transferred)
Info::
73 HTTP requests
Info::
Estimated 0.18 g CO2 per page load
878 KB / 2.4 MB budget
878 KB transferred
73 requests
0.18 g CO2 per page load
JavaScript 324.2 KiB 37%
Images 163.7 KiB 19%
Other 143.0 KiB 16%
Fonts 140.4 KiB 16%
HTML 66.2 KiB 8%
CSS 35.1 KiB 4%
Other 2.0 KiB 0%
Other 2.0 KiB 0%
Other 1.4 KiB 0%
0 2.4 MB 4.9 MB
Under budget
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
3 fonts (140 KB)
PASS
3 fonts (140 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

140 KB total

Render-blocking

0

of 3

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 FCP 1.0 s LCP 1.5 sdata:font/woff2;base64,d09GMgABAAAAALycABAAAAACBigAALw5AAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGoN2G4K7fhza…woff2;base64,d09GMgABAA... data:font/woff2;base64,d09GMgABAAAAALycABAAAAACBigAALw5AAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGoN2G4K7fhza… — 47.2 KiB — 0 ms — font-display: swapdata:font/woff2;base64,d09GMgABAAAAALbgABAAAAACBWgAALZ8AAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGoN2G4K6eBza…woff2;base64,d09GMgABAA... data:font/woff2;base64,d09GMgABAAAAALbgABAAAAACBWgAALZ8AAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGoN2G4K6eBza… — 45.7 KiB — 0 ms — font-display: swapdata:font/woff2;base64,d09GMgABAAAAAL5EABAAAAACB4AAAL3gAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGoN2G4K7VBza…woff2;base64,d09GMgABAA... data:font/woff2;base64,d09GMgABAAAAAL5EABAAAAACB4AAAL3gAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGoN2G4K7VBza… — 47.6 KiB — 0 ms — font-display: swap
woff2;base64,d09GMgABAA... woff2 swap
Size 47 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
woff2;base64,d09GMgABAA... woff2 swap
Size 46 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
woff2;base64,d09GMgABAA... woff2 swap
Size 48 KB
Load time 0 ms
Start 0 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
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=3600 (1 hour)
PASS
max-age=3600 (1 hour)
Info::
Cache-Control header is set
Got: max-age=3600
Info::
Effective TTL: 1 hour (max-age=3600)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=3600

DirectiveValueMeaning
max-age3600Cache for 1 hour
Effective TTL: 3600 seconds
Network Waterfall
73 requests over 0ms
INFO

Performance analysis not available for this result.

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 816ms · 242KB · $11/mo
nordvpn.com
Other
Costly
Execution 622ms
Transfer 66 KB
Monthly Cost $8/mo
Unattributable
Other
Optional
Execution 137ms
Transfer 0 KB
Monthly Cost $2/mo
nordvpn.com
Other
Optional
Execution 56ms
Transfer 176 KB
Unused 40%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • nordvpn.com adds 622ms and costs ~$8/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

nordvpn.com takes 622ms 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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