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https://onelink.to

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
90
GRADE
A
FIX
2
REVIEW
2
PASS
9
INFO
2

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

Mobile Desktop
93
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
95
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
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.

1.23 s

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

1.23 s

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

0 ms

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

0.074

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

1.23 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.

1.23 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
15
9 PASS 2 REVIEW 2 FIX
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 (255.0 KiB of 255.1 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
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.

B
JS Bundles
1 scripts, 61 KB unused
REVIEW
1 scripts, 61 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-4BBB...: 61 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 61 KB
61 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-4BBB0HXQSM150 KB61 KB (41%)✓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

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

Green Hosting

No green hosting detected

A+
Page Weight Budget
255 KB transferred, 8 requests
PASS
255 KB transferred, 8 requests
Info::
Page weighs 752 KB (255 KB transferred)
Info::
8 HTTP requests
Info::
Estimated 0.05 g CO2 per page load
255 KB / 2.4 MB budget
255 KB transferred
8 requests
0.05 g CO2 per page load
JavaScript 150.0 KiB 59%
HTML 95.8 KiB 38%
Fonts 7.7 KiB 3%
CSS 929 B 0%
Other 549 B 0%
Other 140 B 0%
Images 0 B 0%
0 2.4 MB 4.9 MB
Under budget
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+
Image Optimization
2 images, 0 KB saveable
PASS
2 images, 0 KB saveable
Info::
All images are well-optimized
2 images 0 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
JS Execution Cost
278ms total JS execution
PASS
278ms total JS execution
Info::
https://www.onelink.to/: 217ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-4BBB...: 61ms CPU time
Warning::
Third-party scripts: 278ms (100% of total)

Main Thread Breakdown

Script Evaluation 35% Other 30% Style & Layout 18% Rendering 7% Script Parsing & Compilation 5%
ScriptTotalScriptingParse/CompileParty
https://www.onelink.to/217ms61ms7ms3rd
https://www.googletagmanager.com/gtag/js?id=G-4BBB0HXQSM61ms48ms10ms3rd
A+
Font Loading
1 fonts (8 KB)
PASS
1 fonts (8 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

8 KB total

Render-blocking

0

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s FCP 1.2 s LCP 1.2 shttps://fonts.gstatic.com/s/poppins/v24/pxiByp8kv8JHgFVrLCz7Z1xlFd2JQEk.woff2pxiByp8kv8JHgFVrLCz7Z1x... https://fonts.gstatic.com/s/poppins/v24/pxiByp8kv8JHgFVrLCz7Z1xlFd2JQEk.woff2 — 7.7 KiB — 26 ms — font-display: swap
pxiByp8kv8JHgFVrLCz7Z1x... woff2 swap
Size 8 KB
Load time 26 ms
Start 352 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
A
Page Weight Inventory
8 resources · 255 KB · 61 KB savings available
PASS
8 resources · 255 KB · 61 KB savings available
Info::
Within 1MB page-weight target
Got: 255 KB
Info::
~61 KB of savings available
Warning::
7 third-party resources (100% of weight)
8 resources · 255.1 KiB · 7 third-party Within 1MB page-weight target
JavaScript 59% · 150.0 KiB
Document 38% · 95.8 KiB
Font 3% · 7.7 KiB
CSS 0% · 929 B
Other 0% · 689 B
Image 0% · 0 B

~61.5 KiB of savings available

Remove unused JavaScript: 61.5 KiB
Network Waterfall
8 requests over 649ms
INFO
0 ms 500 ms 1.0 s FCP 1.2 s LCP 1.2 shttps://onelink.to// https://onelink.to/ — 307 — 140 B — 96 ms — http/1.1https://www.onelink.to/www.onelink.to/ https://www.onelink.to/ — 200 — 95.8 KiB — 188 ms — http/1.1https://fonts.googleapis.com/css2?family=Poppins:wght@700&display=swapfonts.googleapis.com/css2?family=Po... https://fonts.googleapis.com/css2?family=Poppins:wght@700&display=swap — 200 — 929 B — 74 ms — h2data:image/gif;base64,R0lGODlhGwAbAKEBAAAAAP///////////yH5BAEKAAIALAAAAAAbABsAAAJ7jI+pC+0Q2oExPlkR1…data:image/gif;base64,R0lGODlhGwAbA... data:image/gif;base64,R0lGODlhGwAbAKEBAAAAAP///////////yH5BAEKAAIALAAAAAAbABsAAAJ7jI+pC+0Q2oExPlkR1… — 200 — 0 B — 0 ms — datadata:image/gif;base64,R0lGODlhGwAbAKEBAAAAAP///////////yH5BAEKAAIALAAAAAAbABsAAAJ+jI+pC+1gYHjxtZigt…data:image/gif;base64,R0lGODlhGwAbA... data:image/gif;base64,R0lGODlhGwAbAKEBAAAAAP///////////yH5BAEKAAIALAAAAAAbABsAAAJ+jI+pC+1gYHjxtZigt… — 200 — 0 B — 0 ms — datahttps://fonts.gstatic.com/s/poppins/v24/pxiByp8kv8JHgFVrLCz7Z1xlFd2JQEk.woff2fonts.gstatic.com/s/poppins/v24/pxi... https://fonts.gstatic.com/s/poppins/v24/pxiByp8kv8JHgFVrLCz7Z1xlFd2JQEk.woff2 — 200 — 7.7 KiB — 26 ms — h3https://www.googletagmanager.com/gtag/js?id=G-4BBB0HXQSMwww.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-4BBB0HXQSM — 200 — 150.0 KiB — 143 ms — h2https://region1.google-analytics.com/g/collect?v=2&tid=G-4BBB0HXQSM&gtm=45je64h1v883920511za200zd883920511&_p=1776815710250&gcd=13l3lPl2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=Vi3aTtMSwXAMEERGNkwiE14Ay5uQRS&frm=0&pscdl=noapi&rcb=15&sr=800x600&uaa=x86&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115616986~115938465~115938469~117266401~117512542&sid=1776815710&sct=1&seg=0&dl=https%3A%2F%2Fwww.onelink.to%2F&dt=Onelink.to%20-%20One%20link%20or%20QR%20code%20to%20App%20Store%20and%20Google%20Play&en=page_view&_fv=1&_ss=1&_ee=1&ep.analytics_storage=denied&ep.ad_storage=denied&tfd=584region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-4BBB0HXQSM&gtm=45je64h1v883920511za200zd883920511&_p=1776815710250&gcd=13l3lPl2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=Vi3aTtMSwXAMEERGNkwiE14Ay5uQRS&frm=0&pscdl=noapi&rcb=15&sr=800x600&uaa=x86&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115616986~115938465~115938469~117266401~117512542&sid=1776815710&sct=1&seg=0&dl=https%3A%2F%2Fwww.onelink.to%2F&dt=Onelink.to%20-%20One%20link%20or%20QR%20code%20to%20App%20Store%20and%20Google%20Play&en=page_view&_fv=1&_ss=1&_ee=1&ep.analytics_storage=denied&ep.ad_storage=denied&tfd=584 — 204 — 549 B — 65 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
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 278ms · 246KB · $4/mo
www.onelink.to
Other
Costly
Execution 217ms
Transfer 96 KB
Monthly Cost $3/mo
Google Tag Manager
Tag Manager
Optional
Execution 61ms
Transfer 150 KB
Unused 41%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.onelink.to adds 217ms and costs ~$3/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

www.onelink.to takes 217ms 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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