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Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
66
GRADE
D
FIX
5
REVIEW
1
PASS
6
INFO
2

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

Mobile Desktop
79
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.

624 ms

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

1.63 s

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

260 ms

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

0.000

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

2.37 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.

5.57 s

Page Load Progression

3.2 s
6.5 s
9.7 s
12.9 s
16.2 s
19.4 s
22.6 s
25.9 s
Checks
14
6 PASS 1 REVIEW 5 FIX
F
Page Weight Budget
Action
6.1 MB transferred, 188 requests
FIX
6.1 MB transferred, 188 requests
Critical::
Page weighs 14.0 MB (6.1 MB transferred)
Warning::
JavaScript is 2.0 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.0 MB
Info::
Fonts are 255 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 255 KB
Warning::
188 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.3 g CO2 per page load
6.1 MB / 2.4 MB budget
6.1 MB transferred
188 requests
1.3 g CO2 per page load
Other 3.1 MiB 50%
JavaScript 2.0 MiB 33%
Images 347.1 KiB 6%
Fonts 254.7 KiB 4%
Other 250.1 KiB 4%
HTML 135.5 KiB 2%
CSS 67.6 KiB 1%
Other 1.8 KiB 0%
Other 861 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

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
78% third-party, 0 ms blocking
FIX
78% third-party, 0 ms blocking
Warning::
Third-party code accounts for 78% of page weight (4.8 MiB of 6.1 MiB)
Info::
Third-party blocking time is low (0 ms)
22%
78%
First-party Third-party
F
JS Execution Cost
Action
15462ms total JS execution
FIX
15462ms total JS execution
Warning::
https://grafana.com/: 12707ms CPU time
Warning::
Unattributable: 878ms CPU time
Warning::
https://grafana.com/mw/_next/static/chunks/2856-2b...: 510ms CPU time
Warning::
https://grafana.com/mw/_next/static/chunks/4032-1d...: 357ms CPU time
Warning::
https://grafana.com/mw/_next/static/chunks/7206-43...: 254ms CPU time
Info::
Third-party scripts: 1428ms (9% of total)

Main Thread Breakdown

Other 56% Style & Layout 23% Script Evaluation 10% Rendering 9%
ScriptTotalScriptingParse/CompileParty
https://grafana.com/12707ms22ms31ms1st
Unattributable878ms9ms0ms3rd
https://grafana.com/mw/_next/static/chunks/2856-2b340da23d3d886c.js?dpl=dpl_9ZUD8dLz5ec9xVbV1xnNGDvTqfxN510ms446ms6ms1st
https://grafana.com/mw/_next/static/chunks/4032-1dabfe8da0928d78.js?dpl=dpl_9ZUD8dLz5ec9xVbV1xnNGDvTqfxN357ms297ms26ms1st
https://grafana.com/mw/_next/static/chunks/7206-430fc12605b6aab5.js?dpl=dpl_9ZUD8dLz5ec9xVbV1xnNGDvTqfxN254ms123ms28ms1st
https://js.intercomcdn.com/vendor-modern.df860bed.js169ms151ms15ms3rd
https://www.googletagmanager.com/gtag/js?id=G-YCR8N4GG1P&cx=c&gtm=4e6411167ms142ms19ms3rd
https://grafana.com/mw/_next/static/chunks/4bfa248b-6982861b3bc59acc.js?dpl=dpl_9ZUD8dLz5ec9xVbV1xnNGDvTqfxN101ms35ms8ms1st
https://js.intercomcdn.com/frame-modern.40aacdf2.js100ms57ms28ms3rd
https://x.clearbitjs.com/v2/pk_d59280887896c2b65857edbe1274ca2e/tracking.min.js58ms47ms8ms3rd

Showing top 10 of 13 scripts

F
JS Bundles
Action
32 scripts, 812 KB unused
FIX
32 scripts, 812 KB unused
Warning::
https://grafana.com/mw/_next/static/chunks/7206-43...: 161 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://grafana.com/mw/_next/static/chunks/4032-1d...: 132 KB unused (63%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://js.intercomcdn.com/frame-modern.40aacdf2.j...: 123 KB unused (64%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-YCR8...: 113 KB unused (64%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://js.intercomcdn.com/vendor-modern.df860bed....: 85 KB unused (60%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 812 KB
812 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://grafana.com/mw/_next/static/chunks/7206-430fc12605b6aab5.js?dpl=dpl_9ZUD8dLz5ec9xVbV1xnNGDvTqfxN233 KB161 KB (69%)✓1st
https://grafana.com/mw/_next/static/chunks/4032-1dabfe8da0928d78.js?dpl=dpl_9ZUD8dLz5ec9xVbV1xnNGDvTqfxN208 KB132 KB (63%)✓1st
https://js.intercomcdn.com/frame-modern.40aacdf2.js192 KB123 KB (64%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-YCR8N4GG1P177 KB113 KB (64%)✓3rd
https://js.intercomcdn.com/vendor-modern.df860bed.js144 KB85 KB (60%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-957251243136 KB75 KB (55%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-YCR8N4GG1P&cx=c&gtm=4e6411177 KB66 KB (38%)✓3rd
https://connect.facebook.net/en_US/fbevents.js95 KB33 KB (35%)✓3rd
https://grafana.com/mw/_next/static/chunks/4bfa248b-6982861b3bc59acc.js?dpl=dpl_9ZUD8dLz5ec9xVbV1xnNGDvTqfxN62 KB23 KB (37%)✓1st
https://grafana.com/mw/_next/static/chunks/app/%5Blocale%5D/layout-1b531f8e6b309b98.js?dpl=dpl_9ZUD8dLz5ec9xVbV1xnNGDvTqfxN4 KB—✓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

D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: private, no-cache, no-store, max-age=0, must-revalidate
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

private, no-cache, no-store, max-age=0, must-revalidate

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
no-cache—Cache but always revalidate first
no-store—Never cache this response
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
B
Image Optimization
65 images, 0 KB saveable
REVIEW
65 images, 0 KB saveable
Info::
All images are well-optimized
65 images 347 KB
0 oversized -0 KB
60 legacy format
0 missing dimensions CLS risk
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 (255 KB)
PASS
7 fonts (255 KB)
Info::
7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

7

255 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 500 ms 1.0 s 1.5 s FCP 624 ms LCP 1.6 shttps://grafana.com/mw/_next/static/media/0484562807a97172-s.p.woff20484562807a97172-s.p.woff2 https://grafana.com/mw/_next/static/media/0484562807a97172-s.p.woff2 — 8.1 KiB — 0 ms — font-display: swaphttps://grafana.com/mw/_next/static/media/8888a3826f4a3af4-s.p.woff28888a3826f4a3af4-s.p.woff2 https://grafana.com/mw/_next/static/media/8888a3826f4a3af4-s.p.woff2 — 7.8 KiB — 0 ms — font-display: swaphttps://grafana.com/mw/_next/static/media/8a7cb27d142e3e19-s.p.ttf8a7cb27d142e3e19-s.p.ttf https://grafana.com/mw/_next/static/media/8a7cb27d142e3e19-s.p.ttf — 99.5 KiB — 0 ms — font-display: swaphttps://grafana.com/mw/_next/static/media/b957ea75a84b6ea7-s.p.woff2b957ea75a84b6ea7-s.p.woff2 https://grafana.com/mw/_next/static/media/b957ea75a84b6ea7-s.p.woff2 — 7.9 KiB — 0 ms — font-display: swaphttps://grafana.com/mw/_next/static/media/e4af272ccee01ff0-s.p.woff2e4af272ccee01ff0-s.p.woff2 https://grafana.com/mw/_next/static/media/e4af272ccee01ff0-s.p.woff2 — 47.7 KiB — 0 ms — font-display: swaphttps://grafana.com/mw/_next/static/media/e9955780856cf8aa-s.p.woff2e9955780856cf8aa-s.p.woff2 https://grafana.com/mw/_next/static/media/e9955780856cf8aa-s.p.woff2 — 75.7 KiB — 0 ms — font-display: swaphttps://grafana.com/mw/_next/static/media/eafabf029ad39a43-s.p.woff2eafabf029ad39a43-s.p.woff2 https://grafana.com/mw/_next/static/media/eafabf029ad39a43-s.p.woff2 — 8.0 KiB — 0 ms — font-display: swap
0484562807a97172-s.p.woff2 woff2 swap
Size 8 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
8888a3826f4a3af4-s.p.woff2 woff2 swap
Size 8 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
8a7cb27d142e3e19-s.p.ttf ttf swap
Size 99 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
b957ea75a84b6ea7-s.p.woff2 woff2 swap
Size 8 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
e4af272ccee01ff0-s.p.woff2 woff2 swap
Size 48 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
e9955780856cf8aa-s.p.woff2 woff2 swap
Size 76 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
eafabf029ad39a43-s.p.woff2 woff2 swap
Size 8 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 ~30 KB and ~60 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: Google Cloud

Network Waterfall
188 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
9% of JavaScript execution is third-party
First-party Third-party 1428ms · 693KB · $25/mo
Unattributable
Other
Costly
Execution 878ms
Transfer 0 KB
Monthly Cost $15/mo
js.intercomcdn.com
Other
Optional
Execution 169ms
Transfer 144 KB
Unused 60%
Monthly Cost $3/mo
Google Tag Manager
Tag Manager
Optional
Execution 167ms
Transfer 177 KB
Unused 38%
Monthly Cost $3/mo
js.intercomcdn.com
Other
Optional
Execution 100ms
Transfer 192 KB
Unused 64%
Monthly Cost $2/mo
x.clearbitjs.com
Other
Optional
Execution 58ms
Transfer 45 KB
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 55ms
Transfer 136 KB
Unused 55%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • Unattributable adds 878ms and costs ~$15/month

Unattributable takes 878ms 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

60% of js.intercomcdn.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

64% of js.intercomcdn.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

55% of Google Tag Manager'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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