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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
65
GRADE
D
FIX
4
REVIEW
2
PASS
6
INFO
2

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

Mobile Desktop
43
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
90
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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

1.65 s

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

4.69 s

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

515 ms

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

0.009

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

3.18 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.

9.26 s

Page Load Progression

1.2 s
2.4 s
3.6 s
4.8 s
6.0 s
7.2 s
8.4 s
9.6 s
Checks
14
6 PASS 2 REVIEW 4 FIX
F
Page Weight Budget
Action
15.4 MB transferred, 324 requests
FIX
15.4 MB transferred, 324 requests
Critical::
Page weighs 24.6 MB (15.4 MB transferred)
Warning::
JavaScript is 3.8 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 3.8 MB
Warning::
Images are 1.7 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.7 MB
Info::
Fonts are 443 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 443 KB
Info::
CSS is 426 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 426 KB
Warning::
324 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 3.2 g CO2 per page load
15.4 MB / 2.4 MB budget
15.4 MB transferred
324 requests
3.2 g CO2 per page load
Other 8.9 MiB 58%
JavaScript 3.8 MiB 24%
Images 1.7 MiB 11%
Fonts 443.0 KiB 3%
CSS 426.1 KiB 3%
HTML 99.1 KiB 1%
Other 47.3 KiB 0%
Other 15.9 KiB 0%
Other 1.0 KiB 0%
Other 782 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

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

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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

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
84% third-party, 0 ms blocking
FIX
84% third-party, 0 ms blocking
Warning::
Third-party code accounts for 84% of page weight (12.9 MiB of 15.4 MiB)
Info::
Third-party blocking time is low (0 ms)
16%
84%
First-party Third-party
F
JS Execution Cost
Action
3935ms total JS execution
FIX
3935ms total JS execution
Warning::
https://www.elastic.co/: 752ms CPU time
Warning::
https://cdn.optimizely.com/js/18132920325.js: 710ms CPU time
Warning::
Unattributable: 446ms CPU time
Warning::
https://edge.fullstory.com/s/fs.js: 362ms CPU time
Info::
https://cdn.iubenda.com/cookie_solution/iubenda_cs...: 244ms CPU time
Warning::
Third-party scripts: 2759ms (70% of total)

Main Thread Breakdown

Script Evaluation 62% Other 18% Script Parsing & Compilation 6% Style & Layout 6% Rendering 4%
ScriptTotalScriptingParse/CompileParty
https://www.elastic.co/752ms22ms0ms1st
https://cdn.optimizely.com/js/18132920325.js710ms586ms64ms3rd
Unattributable446ms54ms0ms3rd
https://edge.fullstory.com/s/fs.js362ms234ms9ms3rd
https://cdn.iubenda.com/cookie_solution/iubenda_cs/1.95.1/core-en.js244ms203ms17ms3rd
https://www.elastic.co/_next/static/chunks/pages/_app-d97c12df8c67cb18.js214ms161ms39ms1st
https://www.elastic.co/_next/static/chunks/framework-392d634b29ac61bc.js210ms169ms6ms1st
https://www.googletagmanager.com/gtm.js?id=GTM-KNJMG2M201ms165ms24ms3rd
https://play.vidyard.com/embed/v4.js144ms132ms9ms3rd
https://www.googletagmanager.com/gtag/destination?id=AW-985891458&cx=c&gtm=4e6411127ms111ms14ms3rd

Showing top 10 of 17 scripts

F
JS Bundles
Action
117 scripts, 1.2 MB unused
FIX
117 scripts, 1.2 MB unused
Warning::
https://www.elastic.co/_next/static/chunks/pages/_...: 484 KB unused (45%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.iubenda.com/cookie_solution/iubenda_cs...: 74 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.optimizely.com/js/18132920325.js: 65 KB unused (24%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-Q7TE...: 62 KB unused (38%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/destination?...: 61 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.2 MB
1268 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.elastic.co/_next/static/chunks/pages/_app-d97c12df8c67cb18.js1096 KB484 KB (45%)✓1st
https://cdn.iubenda.com/cookie_solution/iubenda_cs/1.95.1/core-en.js109 KB74 KB (69%)✓3rd
https://cdn.optimizely.com/js/18132920325.js267 KB65 KB (24%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-Q7TEQDPTH5&cx=c&gtm=4e6411163 KB62 KB (38%)✓3rd
https://www.googletagmanager.com/gtag/destination?id=DC-15244908&cx=c&gtm=4e6411128 KB61 KB (47%)✓3rd
https://www.googletagmanager.com/gtag/destination?id=AW-985891458&cx=c&gtm=4e6411144 KB60 KB (42%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KNJMG2M190 KB60 KB (32%)✓3rd
https://www.elastic.co/_next/static/chunks/97067-20b12381b2d5777c.js104 KB50 KB (48%)✓1st
https://www.elastic.co/_next/static/chunks/46066-f7ae5bc03e0dcf9e.js58 KB47 KB (81%)✓1st
https://www.elastic.co/_next/static/chunks/main-598d2a178acfdbd2.js110 KB46 KB (42%)✓1st

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

C
Image Optimization
Action
60 images, 0 KB saveable
REVIEW
60 images, 0 KB saveable
Warning::
https://elastic-global-nav-assets.s3.us-west-2.ama... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static-www.elastic.co/v3/assets/bltefdd0b5... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://elastic-global-nav-assets.s3.us-west-2.ama... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.contentstack.io/v3/assets/bltefdd0b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.contentstack.io/v3/assets/bltefdd0b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static-www.elastic.co/v3/assets/bltefdd0b5... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static-www.elastic.co/v3/assets/bltefdd0b5... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static-www.elastic.co/v3/assets/bltefdd0b5... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static-www.elastic.co/v3/assets/bltefdd0b5... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static-www.elastic.co/v3/assets/bltefdd0b5... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://elastic-global-nav-assets.s3.us-west-2.ama... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static-www.elastic.co/v3/assets/bltefdd0b5... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static-www.elastic.co/v3/assets/bltefdd0b5... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.elastic.co/static-res/images/svg/icon-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static-www.elastic.co/v3/assets/bltefdd0b5... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static-www.elastic.co/v3/assets/bltefdd0b5... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.contentstack.io/v3/assets/bltefdd0b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://images.contentstack.io/v3/assets/bltefdd0b... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://static-www.elastic.co/v3/assets/bltefdd0b5... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
60 images 1.6 MB
0 oversized -0 KB
55 legacy format
19 missing dimensions CLS risk

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Green Hosting

No green hosting detected

A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
3 fonts (443 KB)
PASS
3 fonts (443 KB)
Info::
3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

3

443 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 1.0 s 2.0 s 3.0 s 4.0 s FCP 1.6 s LCP 4.7 shttps://static-www.elastic.co/v3/assets/bltefdd0b53724fa2ce/blt1e7581a545d9723c/65f10861d4e0c03dab290f48/InterVariable.woff2InterVariable.woff2 https://static-www.elastic.co/v3/assets/bltefdd0b53724fa2ce/blt1e7581a545d9723c/65f10861d4e0c03dab290f48/InterVariable.woff2 — 338.8 KiB — 0 ms — font-display: swaphttps://www.elastic.co/static-res/fonts/MierB-Demi.woff2MierB-Demi.woff2 https://www.elastic.co/static-res/fonts/MierB-Demi.woff2 — 62.0 KiB — 0 ms — font-display: swaphttps://www.elastic.co/static-res/fonts/SpaceMono-Regular.ttfSpaceMono-Regular.ttf https://www.elastic.co/static-res/fonts/SpaceMono-Regular.ttf — 42.1 KiB — 0 ms — font-display: swap
InterVariable.woff2 woff2 swap
Size 339 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
MierB-Demi.woff2 woff2 swap
Size 62 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
SpaceMono-Regular.ttf ttf swap
Size 42 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
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)

Fixing the unchecked items could save ~182 KB and ~364 ms

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+
HTTP Caching
max-age=3600 (1 hour)
PASS
max-age=3600 (1 hour)
Info::
Cache-Control header is set
Got: public, max-age=3600
Info::
Effective TTL: 1 hour (max-age=3600)
Info::
ETag present — enables conditional (304) responses
Cache-Control

public, max-age=3600

DirectiveValueMeaning
public—Any cache may store this response
max-age3600Cache for 1 hour
Effective TTL: 3600 seconds
Network Waterfall
324 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
70% of JavaScript execution is third-party
First-party Third-party 2759ms · 1258KB · $52/mo
Optimizely
A/B Testing
Costly
Execution 710ms
Transfer 267 KB
Unused 24%
Monthly Cost $13/mo
Unattributable
Other
Costly
Execution 446ms
Transfer 0 KB
Monthly Cost $8/mo
edge.fullstory.com
Other
Costly
Execution 362ms
Transfer 80 KB
Unused 38%
Monthly Cost $7/mo
Iubenda
Consent
Essential
Execution 244ms
Transfer 109 KB
Unused 69%
Monthly Cost $5/mo
Google Tag Manager
Tag Manager
Costly
Execution 201ms
Transfer 190 KB
Unused 32%
Monthly Cost $4/mo
play.vidyard.com
Other
Optional
Execution 144ms
Transfer 23 KB
Monthly Cost $3/mo
Google Tag Manager
Tag Manager
Optional
Execution 127ms
Transfer 144 KB
Unused 42%
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 121ms
Transfer 163 KB
Unused 38%
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 80ms
Transfer 128 KB
Unused 47%
Monthly Cost $2/mo
tag.demandbase.com
Other
Optional
Execution 78ms
Transfer 18 KB
Monthly Cost $1/mo
Microsoft Clarity
Session Replay
Optional
Execution 70ms
Transfer 26 KB
Monthly Cost $1/mo
Facebook Pixel
Advertising
Optional
Execution 69ms
Transfer 95 KB
Unused 36%
Monthly Cost $1/mo
js.adsrvr.org
Other
Optional
Execution 52ms
Transfer 11 KB
Monthly Cost $1/mo
lift-ai-js.marketlinc.com
Other
Optional
Execution 52ms
Transfer 4 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • Optimizely adds 710ms and costs ~$13/month
  • Unattributable adds 446ms and costs ~$8/month
  • edge.fullstory.com adds 362ms and costs ~$7/month
  • Google Tag Manager adds 201ms and costs ~$4/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

Optimizely takes 710ms 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 446ms 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

edge.fullstory.com takes 362ms 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

69% of Iubenda'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 201ms 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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