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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
72
GRADE
C
FIX
3
REVIEW
3
PASS
6
INFO
2

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

Mobile Desktop
51
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
97
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
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.

1.49 s

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

3.40 s

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

435 ms

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

0.048

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

2.68 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.

5.64 s

Page Load Progression

810 ms
1.6 s
2.4 s
3.2 s
4.0 s
4.9 s
5.7 s
6.5 s
Checks
14
6 PASS 3 REVIEW 3 FIX
F
Page Weight Budget
Action
3.6 MB transferred, 243 requests
FIX
3.6 MB transferred, 243 requests
Warning::
Page weighs 9.4 MB (3.6 MB transferred)
Warning::
JavaScript is 1.9 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.9 MB
Info::
Fonts are 1.1 MB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 1.1 MB
Warning::
243 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.75 g CO2 per page load
3.6 MB / 2.4 MB budget
3.6 MB transferred
243 requests
0.75 g CO2 per page load
JavaScript 1.9 MiB 53%
Fonts 1.1 MiB 31%
Images 317.3 KiB 9%
HTML 139.5 KiB 4%
CSS 63.0 KiB 2%
Other 35.4 KiB 1%
Other 13.2 KiB 0%
Other 8.6 KiB 0%
Other 5.3 KiB 0%
Other 5.2 KiB 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

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

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
JS Execution Cost
Action
2684ms total JS execution
FIX
2684ms total JS execution
Warning::
https://www.hubspot.com/: 535ms CPU time
Warning::
Unattributable: 372ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-N5L...: 319ms CPU time
Warning::
https://script.hotjar.com/modules.6a0f3932cb1341a3...: 288ms CPU time
Info::
https://js.hs-analytics.net/analytics/177532320000...: 205ms CPU time
Warning::
Third-party scripts: 2027ms (76% of total)

Main Thread Breakdown

Script Evaluation 53% Other 18% Style & Layout 16% Script Parsing & Compilation 7%
ScriptTotalScriptingParse/CompileParty
https://www.hubspot.com/535ms12ms2ms1st
Unattributable372ms35ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-N5LT88319ms270ms26ms3rd
https://script.hotjar.com/modules.6a0f3932cb1341a35c18.js288ms248ms9ms3rd
https://js.hs-analytics.net/analytics/1775323200000/53.js205ms138ms5ms3rd
https://static.hsappstatic.net/conversations-visitor-ui/static-1.28445/bundles/visitor.js180ms126ms41ms3rd
https://static.hsappstatic.net/head-dlb/static-1.4841/bundle.production.js138ms126ms2ms3rd
https://www.googletagmanager.com/gtag/js?id=G-LXTM6CQ0XK&cx=c&gtm=4e6411115ms98ms16ms3rd
https://tags.pw.adn.cloud/V9WA75/activation.js110ms100ms5ms3rd
https://www.googletagmanager.com/gtag/js?id=G-X&cx=c&gtm=4e641190ms76ms12ms3rd

Showing top 10 of 15 scripts

F
JS Bundles
Action
74 scripts, 507 KB unused
FIX
74 scripts, 507 KB unused
Warning::
https://static.hsappstatic.net/conversations-visit...: 149 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-LXTM...: 69 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-X&cx...: 59 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/destination?...: 58 KB unused (45%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-N5L...: 54 KB unused (26%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 507 KB
507 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://static.hsappstatic.net/conversations-visitor-ui/static-1.28445/bundles/visitor.js342 KB149 KB (44%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-LXTM6CQ0XK&cx=c&gtm=4e6411172 KB69 KB (40%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-X&cx=c&gtm=4e6411135 KB59 KB (44%)✓3rd
https://www.googletagmanager.com/gtag/destination?id=DC-11620487&cx=c&gtm=4e6411130 KB58 KB (45%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-N5LT88209 KB54 KB (26%)✓3rd
https://cdn.intellimize.co/snippet/117964275.js117 KB40 KB (34%)✓3rd
https://tags.pw.adn.cloud/V9WA75/activation.js43 KB27 KB (63%)✓3rd
https://static.hsappstatic.net/whisper-core/static-1.8755/whisper-core-entry.js36 KB26 KB (74%)✓3rd
https://script.hotjar.com/modules.6a0f3932cb1341a35c18.js57 KB25 KB (44%)✓3rd
https://js.hs-analytics.net/analytics/1775323200000/53.js50 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

B
Third-Party Impact
58% third-party, 0 ms blocking
REVIEW
58% third-party, 0 ms blocking
Warning::
Third-party code accounts for 58% of page weight (2.0 MiB of 3.6 MiB)
Info::
Third-party blocking time is low (0 ms)
42%
58%
First-party Third-party
B
Image Optimization
40 images, 0 KB saveable
REVIEW
40 images, 0 KB saveable
Info::
All images are well-optimized
40 images 317 KB
0 oversized -0 KB
25 legacy format
0 missing dimensions CLS risk
B
HTTP Caching
s-maxage=0,max-age=0
REVIEW
s-maxage=0,max-age=0
Info::
Cache-Control header is set
Got: s-maxage=0,max-age=0
Info::
Last-Modified header present
Cache-Control

s-maxage=0,max-age=0

DirectiveValueMeaning
s-maxage0CDN caches for 0 seconds
max-age0Cache for 0 seconds
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 (1114 KB)
PASS
7 fonts (1114 KB)
Info::
7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

7

1114 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 1.0 s 2.0 s 3.0 s FCP 1.5 s LCP 3.4 shttps://static2cdn.hubspot.com/hubspot.com/static-1.4200/_hsg-ss/build/icons/hsg-icons.woff2hsg-icons.woff2 https://static2cdn.hubspot.com/hubspot.com/static-1.4200/_hsg-ss/build/icons/hsg-icons.woff2 — 13.2 KiB — 0 ms — font-display: swaphttps://www.hubspot.com/hubfs/assets/hs-components/v4/fonts/hubspot-2025/HubSpotSans-Medium.woff2HubSpotSans-Medium.woff2 https://www.hubspot.com/hubfs/assets/hs-components/v4/fonts/hubspot-2025/HubSpotSans-Medium.woff2 — 27.6 KiB — 0 ms — font-display: swaphttps://www.hubspot.com/hubfs/assets/hs-components/v4/fonts/hubspot-2025/HubSpotSans-Book.woff2HubSpotSans-Book.woff2 https://www.hubspot.com/hubfs/assets/hs-components/v4/fonts/hubspot-2025/HubSpotSans-Book.woff2 — 26.1 KiB — 0 ms — font-display: swaphttps://www.hubspot.com/hubfs/assets/hs-components/v4/fonts/ja/ZenKakuGothicNew-Medium.woff2ZenKakuGothicNew-Medium... https://www.hubspot.com/hubfs/assets/hs-components/v4/fonts/ja/ZenKakuGothicNew-Medium.woff2 — 958.5 KiB — 0 ms — font-display: swaphttps://www.hubspot.com/hubfs/assets/hs-components/v4/fonts/hubspot-2025/HubSpotSerif-Book.woff2HubSpotSerif-Book.woff2 https://www.hubspot.com/hubfs/assets/hs-components/v4/fonts/hubspot-2025/HubSpotSerif-Book.woff2 — 31.0 KiB — 0 ms — font-display: swaphttps://www.hubspot.com/hubfs/assets/hs-components/v4/fonts/hubspot-2025/HubSpotSerif-Medium.woff2HubSpotSerif-Medium.woff2 https://www.hubspot.com/hubfs/assets/hs-components/v4/fonts/hubspot-2025/HubSpotSerif-Medium.woff2 — 31.6 KiB — 0 ms — font-display: swaphttps://cdn1.hubspot.net/googlefonts/fonts/Lexend_Deca/regular.woff2regular.woff2 https://cdn1.hubspot.net/googlefonts/fonts/Lexend_Deca/regular.woff2 — 26.1 KiB — 0 ms — font-display: swap
hsg-icons.woff2 woff2 swap
Size 13 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
HubSpotSans-Medium.woff2 woff2 swap
Size 28 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
HubSpotSans-Book.woff2 woff2 swap
Size 26 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
ZenKakuGothicNew-Medium... woff2 swap
Size 958 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
HubSpotSerif-Book.woff2 woff2 swap
Size 31 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
HubSpotSerif-Medium.woff2 woff2 swap
Size 32 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
regular.woff2 woff2 swap
Size 26 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)

Fixing the unchecked items could save ~479 KB and ~958 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+
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
243 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
76% of JavaScript execution is third-party
First-party Third-party 2027ms · 1291KB · €11/mo
Unattributable
Other
Costly
Execution 372ms
Transfer 0 KB
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Costly
Execution 319ms
Transfer 209 KB
Unused 26%
Monthly Cost €2/mo
Hotjar
Session Replay
Costly
Execution 288ms
Transfer 57 KB
Unused 44%
Monthly Cost €2/mo
HubSpot Analytics
Analytics
Costly
Execution 205ms
Transfer 50 KB
Monthly Cost €1/mo
static.hsappstatic.net
Other
Optional
Execution 180ms
Transfer 342 KB
Unused 44%
Monthly Cost €1/mo
static.hsappstatic.net
Other
Optional
Execution 138ms
Transfer 19 KB
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 115ms
Transfer 172 KB
Unused 40%
Monthly Cost €1/mo
tags.pw.adn.cloud
Other
Optional
Execution 110ms
Transfer 43 KB
Unused 63%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 90ms
Transfer 135 KB
Unused 44%
Monthly Cost €0/mo
Google Tag Manager
Tag Manager
Optional
Execution 83ms
Transfer 130 KB
Unused 45%
Monthly Cost €0/mo
cdn.intellimize.co
Other
Optional
Execution 67ms
Transfer 117 KB
Unused 34%
Monthly Cost €0/mo
js.hubspot.com
Other
Optional
Execution 61ms
Transfer 17 KB
Monthly Cost €0/mo

These scripts may cost more than they're worth

  • Unattributable adds 372ms and costs ~€2/month
  • Google Tag Manager adds 319ms and costs ~€2/month
  • Hotjar adds 288ms and costs ~€2/month
  • HubSpot Analytics adds 205ms and costs ~€1/month

76% 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 372ms 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 319ms 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

Hotjar takes 288ms 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 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

63% of tags.pw.adn.cloud'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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