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Performance

· 16 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
70
GRADE
C
FIX
5
REVIEW
2
PASS
7
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.
84
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
92
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.

2.54 s

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

6.59 s

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

3.43 s

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

0.168

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

6.16 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.

25.26 s

Page Load Progression

742 ms
1.5 s
2.2 s
3.0 s
3.7 s
4.5 s
5.2 s
5.9 s
Checks
16
7 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
3.9 MB transferred, 133 requests
FIX
3.9 MB transferred, 133 requests
Warning::
Page weighs 10.5 MB (3.9 MB transferred)
Warning::
JavaScript is 2.8 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.8 MB
Info::
Fonts are 624 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 624 KB
Warning::
133 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.82 g CO2 per page load
3.9 MB / 2.4 MB budget
3.9 MB transferred
133 requests
0.82 g CO2 per page load
JavaScript 2.8 MiB 73%
Fonts 623.9 KiB 16%
Images 275.0 KiB 7%
HTML 75.6 KiB 2%
Other 68.8 KiB 2%
CSS 35.0 KiB 1%
Other 1.6 KiB 0%
Other 156 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
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 (3.9 MiB of 3.9 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
11957ms total JS execution
FIX
11957ms total JS execution
Warning::
https://render.com/_next/static/chunks/1255-d97305...: 2179ms CPU time
Warning::
Unattributable: 1962ms CPU time
Warning::
https://render.com/_next/static/chunks/a430f2ba.61...: 1404ms CPU time
Warning::
https://render.com/_next/static/chunks/4544-49afb3...: 1136ms CPU time
Warning::
https://render.com/: 1016ms CPU time
Warning::
Third-party scripts: 11957ms (100% of total)

Main Thread Breakdown

Script Evaluation 57% Other 21% Script Parsing & Compilation 10% Style & Layout 7%
ScriptTotalScriptingParse/CompileParty
https://render.com/_next/static/chunks/1255-d97305407b68a0cb.js?dpl=68486f5c882179ms1864ms25ms3rd
Unattributable1962ms200ms0ms3rd
https://render.com/_next/static/chunks/a430f2ba.61dbbfe044fee59f.js?dpl=h4q5z1404ms1314ms32ms3rd
https://render.com/_next/static/chunks/4544-49afb34c3919eae8.js?dpl=h4q5z1136ms266ms16ms3rd
https://render.com/1016ms84ms88ms3rd
https://cmp.osano.com/AzZf4RUVBUPZc66vt/5eefab51-58ce-4b25-9547-c1676055a663/osano.js762ms660ms46ms3rd
https://render.com/_next/static/chunks/4bd1b696-e21779a6db3ba2ac.js?dpl=68486f5c88663ms582ms24ms3rd
https://render.com/_next/static/chunks/30a37ab2-f85bca4a8bfd55d0.js?dpl=h4q5z638ms2ms634ms3rd
https://www.googletagmanager.com/gtag/js?id=G-QK9L9QJC5N&cx=c&gtm=4e6460h1587ms438ms75ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-N644GXSK489ms413ms67ms3rd

Showing top 10 of 16 scripts

F
JS Bundles
Action
79 scripts, 2.1 MB unused
FIX
79 scripts, 2.1 MB unused
Warning::
https://render.com/_next/static/chunks/30a37ab2-f8...: 1.8 MB unused (99%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-QK9L...: 61 KB unused (36%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-N64...: 51 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://render.com/_next/static/chunks/a430f2ba.61...: 32 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://render.com/_next/static/chunks/4544-49afb3...: 24 KB unused (57%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 2.1 MB
2122 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://render.com/_next/static/chunks/30a37ab2-f85bca4a8bfd55d0.js?dpl=h4q5z1889 KB1865 KB (99%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-QK9L9QJC5N&cx=c&gtm=4e6460h1173 KB61 KB (36%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-N644GXSK146 KB51 KB (46%)✓3rd
https://render.com/_next/static/chunks/a430f2ba.61dbbfe044fee59f.js?dpl=h4q5z62 KB32 KB (52%)✓3rd
https://render.com/_next/static/chunks/4544-49afb34c3919eae8.js?dpl=h4q5z43 KB24 KB (57%)✓3rd
https://render.com/_next/static/chunks/8846-a4dfed608dca4bdb.js?dpl=h4q5z32 KB24 KB (74%)✓3rd
https://render.com/_next/static/chunks/3632-5a45b3e5eb5ee8c6.js?dpl=h4q5z32 KB22 KB (70%)✓3rd
https://render.com/_next/static/chunks/1668-43b055661bd4570a.js?dpl=h4q5z56 KB22 KB (39%)✓3rd
https://cmp.osano.com/AzZf4RUVBUPZc66vt/5eefab51-58ce-4b25-9547-c1676055a663/osano.js85 KB21 KB (25%)✓3rd
https://render.com/_next/static/chunks/170-df20d3518fc72530.js?dpl=h4q5z4 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
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
Image Optimization
Action
24 images, 0 KB saveable
REVIEW
24 images, 0 KB saveable
Warning::
https://cdn.sanity.io/images/hvk0tap5/production/2... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.sanity.io/images/hvk0tap5/production/6... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.sanity.io/images/hvk0tap5/production/a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://cdn.sanity.io/images/hvk0tap5/production/f... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
24 images 275 KB
0 oversized -0 KB
23 legacy format
4 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

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
11 fonts (624 KB)
PASS
11 fonts (624 KB)
Info::
11 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

11

624 KB total

Render-blocking

0

of 11

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 5.0 s 6.0 s FCP 2.5 s LCP 6.6 shttps://render.com/_next/static/media/36de5d5a6fde5419-s.p.woff236de5d5a6fde5419-s.p.woff2 https://render.com/_next/static/media/36de5d5a6fde5419-s.p.woff2 — 75.2 KiB — 0 ms — font-display: swaphttps://render.com/_next/static/media/44bcf5dc211ed559-s.p.woff244bcf5dc211ed559-s.p.woff2 https://render.com/_next/static/media/44bcf5dc211ed559-s.p.woff2 — 55.3 KiB — 0 ms — font-display: swaphttps://render.com/_next/static/media/55dd12438d118bd8-s.p.woff255dd12438d118bd8-s.p.woff2 https://render.com/_next/static/media/55dd12438d118bd8-s.p.woff2 — 75.0 KiB — 0 ms — font-display: swaphttps://render.com/_next/static/media/614210d7392d1f42-s.p.woff2614210d7392d1f42-s.p.woff2 https://render.com/_next/static/media/614210d7392d1f42-s.p.woff2 — 53.1 KiB — 0 ms — font-display: swaphttps://render.com/_next/static/media/772d87814c6d4363-s.p.woff2772d87814c6d4363-s.p.woff2 https://render.com/_next/static/media/772d87814c6d4363-s.p.woff2 — 71.0 KiB — 0 ms — font-display: swaphttps://render.com/_next/static/media/a02a323226559df3-s.p.woff2a02a323226559df3-s.p.woff2 https://render.com/_next/static/media/a02a323226559df3-s.p.woff2 — 67.1 KiB — 0 ms — font-display: swaphttps://render.com/_next/static/media/b134c96c03a76fa5-s.p.woff2b134c96c03a76fa5-s.p.woff2 https://render.com/_next/static/media/b134c96c03a76fa5-s.p.woff2 — 43.1 KiB — 0 ms — font-display: swaphttps://render.com/_next/static/media/c7e359b9e8a1a81c-s.p.woff2c7e359b9e8a1a81c-s.p.woff2 https://render.com/_next/static/media/c7e359b9e8a1a81c-s.p.woff2 — 38.6 KiB — 0 ms — font-display: swaphttps://render.com/_next/static/media/dc03e58dafb0f94e-s.p.woff2dc03e58dafb0f94e-s.p.woff2 https://render.com/_next/static/media/dc03e58dafb0f94e-s.p.woff2 — 46.6 KiB — 0 ms — font-display: swaphttps://render.com/_next/static/media/e8e1f899a4774ee8-s.p.woff2e8e1f899a4774ee8-s.p.woff2 https://render.com/_next/static/media/e8e1f899a4774ee8-s.p.woff2 — 47.9 KiB — 0 ms — font-display: swaphttps://render.com/_next/static/media/eb0b6447daad5399-s.p.woff2eb0b6447daad5399-s.p.woff2 https://render.com/_next/static/media/eb0b6447daad5399-s.p.woff2 — 50.9 KiB — 0 ms — font-display: swap
36de5d5a6fde5419-s.p.woff2 woff2 swap
Size 75 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
44bcf5dc211ed559-s.p.woff2 woff2 swap
Size 55 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
55dd12438d118bd8-s.p.woff2 woff2 swap
Size 75 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
614210d7392d1f42-s.p.woff2 woff2 swap
Size 53 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
772d87814c6d4363-s.p.woff2 woff2 swap
Size 71 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
a02a323226559df3-s.p.woff2 woff2 swap
Size 67 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
b134c96c03a76fa5-s.p.woff2 woff2 swap
Size 43 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
c7e359b9e8a1a81c-s.p.woff2 woff2 swap
Size 39 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
dc03e58dafb0f94e-s.p.woff2 woff2 swap
Size 47 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
e8e1f899a4774ee8-s.p.woff2 woff2 swap
Size 48 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
eb0b6447daad5399-s.p.woff2 woff2 swap
Size 51 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
38 hints, 0 missing preconnects
PASS
38 hints, 0 missing preconnects
Info::
Page uses 38 resource hint(s)

Current Resource Hints

preconnect
—
preload
+28
38
dns-prefetch
—
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
Network Waterfall
133 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 11957ms · 2611KB · $224/mo
render.com
Other
Costly
Execution 2179ms
Transfer 45 KB
Monthly Cost $41/mo
Unattributable
Other
Costly
Execution 1962ms
Transfer 0 KB
Monthly Cost $37/mo
render.com
Other
Costly
Execution 1404ms
Transfer 62 KB
Unused 52%
Monthly Cost $26/mo
render.com
Other
Costly
Execution 1136ms
Transfer 43 KB
Unused 57%
Monthly Cost $21/mo
render.com
Other
Costly
Execution 1016ms
Transfer 76 KB
Monthly Cost $19/mo
cmp.osano.com
Other
Costly
Execution 762ms
Transfer 85 KB
Unused 25%
Monthly Cost $14/mo
render.com
Other
Costly
Execution 663ms
Transfer 54 KB
Monthly Cost $12/mo
render.com
Other
Costly
Execution 638ms
Transfer 1889 KB
Unused 99%
Monthly Cost $12/mo
Google Tag Manager
Tag Manager
Costly
Execution 587ms
Transfer 173 KB
Unused 36%
Monthly Cost $11/mo
Google Tag Manager
Tag Manager
Costly
Execution 489ms
Transfer 146 KB
Unused 46%
Monthly Cost $9/mo
render.com
Other
Costly
Execution 349ms
Transfer 2 KB
Monthly Cost $7/mo
render.com
Other
Costly
Execution 291ms
Transfer 5 KB
Monthly Cost $5/mo
render.com
Other
Optional
Execution 183ms
Transfer 5 KB
Monthly Cost $3/mo
render.com
Other
Optional
Execution 149ms
Transfer 10 KB
Monthly Cost $3/mo
render.com
Other
Optional
Execution 81ms
Transfer 2 KB
Monthly Cost $2/mo
render.com
Other
Optional
Execution 68ms
Transfer 16 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • render.com adds 2179ms and costs ~$41/month
  • Unattributable adds 1962ms and costs ~$37/month
  • render.com adds 1404ms and costs ~$26/month
  • render.com adds 1136ms and costs ~$21/month
  • render.com adds 1016ms and costs ~$19/month
  • cmp.osano.com adds 762ms and costs ~$14/month
  • render.com adds 663ms and costs ~$12/month
  • render.com adds 638ms and costs ~$12/month
  • Google Tag Manager adds 587ms and costs ~$11/month
  • Google Tag Manager adds 489ms and costs ~$9/month
  • render.com adds 349ms and costs ~$7/month
  • render.com adds 291ms and costs ~$5/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

render.com takes 2179ms 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 1962ms 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

render.com takes 1404ms 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

52% of render.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

render.com takes 1136ms 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

57% of render.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

render.com takes 1016ms 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

cmp.osano.com takes 762ms 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

render.com takes 663ms 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

render.com takes 638ms 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

99% of render.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 587ms 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 489ms 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

render.com takes 349ms 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

render.com takes 291ms 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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