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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
70
GRADE
C
FIX
5
REVIEW
2
PASS
5
INFO
2

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

Mobile Desktop
69
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
83
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.

899 ms

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

1.70 s

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

363 ms

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

0.001

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

3.23 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.

5.36 s

Page Load Progression

824 ms
1.6 s
2.5 s
3.3 s
4.1 s
4.9 s
5.8 s
6.6 s
Checks
14
5 PASS 2 REVIEW 5 FIX
F
Page Weight Budget
Action
5.5 MB transferred, 177 requests
FIX
5.5 MB transferred, 177 requests
Critical::
Page weighs 17.2 MB (5.5 MB transferred)
Warning::
JavaScript is 3.3 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 3.3 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::
177 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.2 g CO2 per page load
5.5 MB / 2.4 MB budget
5.5 MB transferred
177 requests
1.2 g CO2 per page load
JavaScript 3.3 MiB 60%
Other 1.2 MiB 22%
Fonts 623.9 KiB 11%
Images 275.0 KiB 5%
HTML 75.6 KiB 1%
CSS 35.0 KiB 1%
Other 1.6 KiB 0%
Other 118 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 (5.5 MiB of 5.5 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
3867ms total JS execution
FIX
3867ms total JS execution
Warning::
https://render.com/: 719ms CPU time
Warning::
Unattributable: 566ms CPU time
Warning::
https://render.com/_next/static/chunks/1255-d97305...: 561ms CPU time
Warning::
https://render.com/_next/static/chunks/4544-49afb3...: 424ms CPU time
Warning::
https://render.com/_next/static/chunks/a430f2ba.61...: 384ms CPU time
Warning::
Third-party scripts: 3867ms (100% of total)

Main Thread Breakdown

Script Evaluation 48% Other 21% Style & Layout 14% Script Parsing & Compilation 9% Rendering 5%
ScriptTotalScriptingParse/CompileParty
https://render.com/719ms32ms15ms3rd
Unattributable566ms99ms0ms3rd
https://render.com/_next/static/chunks/1255-d97305407b68a0cb.js?dpl=68486f5c88561ms417ms5ms3rd
https://render.com/_next/static/chunks/4544-49afb34c3919eae8.js?dpl=h4q5z424ms59ms4ms3rd
https://render.com/_next/static/chunks/a430f2ba.61dbbfe044fee59f.js?dpl=h4q5z384ms369ms8ms3rd
https://cmp.osano.com/AzZf4RUVBUPZc66vt/5eefab51-58ce-4b25-9547-c1676055a663/osano.js194ms167ms11ms3rd
https://render.com/_next/static/chunks/webpack-2627ea077084461a.js?dpl=68486f5c88191ms173ms0ms3rd
https://render.com/_next/static/chunks/4bd1b696-e21779a6db3ba2ac.js?dpl=68486f5c88173ms145ms5ms3rd
https://render.com/_next/static/chunks/30a37ab2-f85bca4a8bfd55d0.js?dpl=h4q5z160ms1ms160ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-N644GXSK139ms122ms15ms3rd

Showing top 10 of 14 scripts

F
JS Bundles
Action
99 scripts, 2.1 MB unused
FIX
99 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/gtm.js?id=GTM-N64...: 67 KB unused (46%)
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://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
2138 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/gtm.js?id=GTM-N644GXSK146 KB67 KB (46%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-QK9L9QJC5N&cx=c&gtm=4e6460173 KB61 KB (36%)✓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/4694.b3f791fbc62d1ba9.js?dpl=h4q5z2 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/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.
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.
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 500 ms 1.0 s 1.5 s FCP 899 ms LCP 1.7 shttps://render.com/_next/static/media/36de5d5a6fde5419-s.p.woff236de5d5a6fde5419-s.p.woff2 https://render.com/_next/static/media/36de5d5a6fde5419-s.p.woff2 — 75.3 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
177 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 3867ms · 3004KB · $73/mo
render.com
Other
Costly
Execution 719ms
Transfer 76 KB
Monthly Cost $13/mo
Unattributable
Other
Costly
Execution 566ms
Transfer 0 KB
Monthly Cost $11/mo
render.com
Other
Costly
Execution 561ms
Transfer 45 KB
Monthly Cost $11/mo
render.com
Other
Costly
Execution 424ms
Transfer 43 KB
Unused 57%
Monthly Cost $8/mo
render.com
Other
Costly
Execution 384ms
Transfer 62 KB
Unused 52%
Monthly Cost $7/mo
cmp.osano.com
Other
Optional
Execution 194ms
Transfer 85 KB
Unused 25%
Monthly Cost $4/mo
render.com
Other
Optional
Execution 191ms
Transfer 5 KB
Monthly Cost $4/mo
render.com
Other
Optional
Execution 173ms
Transfer 54 KB
Monthly Cost $3/mo
render.com
Other
Optional
Execution 160ms
Transfer 1889 KB
Unused 99%
Monthly Cost $3/mo
Google Tag Manager
Tag Manager
Optional
Execution 139ms
Transfer 146 KB
Unused 46%
Monthly Cost $3/mo
Google Tag Manager
Tag Manager
Optional
Execution 116ms
Transfer 173 KB
Unused 36%
Monthly Cost $2/mo
render.com
Other
Optional
Execution 86ms
Transfer 2 KB
Monthly Cost $2/mo
render.com
Other
Optional
Execution 79ms
Transfer 394 KB
Monthly Cost $1/mo
render.com
Other
Optional
Execution 75ms
Transfer 32 KB
Unused 74%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • render.com adds 719ms and costs ~$13/month
  • Unattributable adds 566ms and costs ~$11/month
  • render.com adds 561ms and costs ~$11/month
  • render.com adds 424ms and costs ~$8/month
  • render.com adds 384ms and costs ~$7/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 719ms 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 566ms 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 561ms 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 424ms 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 384ms 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

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

74% 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

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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