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https://upwork.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
89
GRADE
B
FIX
2
REVIEW
1
PASS
10
INFO
2

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

Mobile Desktop
99
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
89
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.
82
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.

720 ms

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

820 ms

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

74 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.

759 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

1.21 s

Page Load Progression

437 ms
875 ms
1.3 s
1.8 s
2.2 s
2.6 s
3.1 s
3.5 s
Checks
15
10 PASS 1 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 (795.5 KiB of 796.1 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 Execution Cost
560ms total JS execution
REVIEW
560ms total JS execution
Warning::
https://www.upwork.com/cdn-cgi/challenge-platform/...: 428ms CPU time
Info::
https://www.upwork.com/: 67ms CPU time
Info::
Unattributable: 65ms CPU time
Warning::
Third-party scripts: 560ms (100% of total)

Main Thread Breakdown

Script Evaluation 75% Other 13% Parse HTML & CSS 4% Style & Layout 3%
ScriptTotalScriptingParse/CompileParty
https://www.upwork.com/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9ed5342c28546798428ms406ms7ms3rd
https://www.upwork.com/67ms15ms1ms3rd
Unattributable65ms3ms0ms3rd
A
Page Weight Budget
796 KB transferred, 23 requests
PASS
796 KB transferred, 23 requests
Info::
Page weighs 1.3 MB (796 KB transferred)
Info::
23 HTTP requests
Info::
Estimated 0.16 g CO2 per page load
796 KB / 2.4 MB budget
796 KB transferred
23 requests
0.16 g CO2 per page load
Other 293.9 KiB 37%
HTML 262.4 KiB 33%
Fonts 145.8 KiB 18%
JavaScript 90.5 KiB 11%
Other 1.7 KiB 0%
Images 1.2 KiB 0%
Other 638 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
3 images, 0 KB saveable
PASS
3 images, 0 KB saveable
Info::
All images are well-optimized
3 images 1 KB
0 oversized -0 KB
2 legacy format
0 missing dimensions CLS risk
A+
Font Loading
1 fonts (146 KB)
PASS
1 fonts (146 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

146 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 720 ms LCP 820 msdata:font/woff2;base64,d09GMgABAAAAAkcgABIAAAAGMigAAkayAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGoPwKhuJlCQc…woff2;base64,d09GMgABAA... data:font/woff2;base64,d09GMgABAAAAAkcgABIAAAAGMigAAkayAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGoPwKhuJlCQc… — 145.8 KiB — 27 ms — font-display: swap
woff2;base64,d09GMgABAA... woff2 swap
Size 146 KB
Load time 27 ms
Start 192 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
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 ~73 KB and ~146 ms

A+
JS Bundles
10 scripts, 0 KB unused
PASS
10 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.upwork.com/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9ed5342c2854679873 KB—✓3rd
blob:https://www.upwork.com/1ac2c366-75f2-46b6-a27b-24f6af46cb710 KB—✓3rd
https://challenges.cloudflare.com/turnstile/v0/g/b0a7532ac8ec/api.js?onload=cFyL2&render=explicit17 KB—✓3rd
blob:https://www.upwork.com/8ef40deb-f8ff-48e1-a5fe-47046aaef953-0 KB—✓3rd
blob:https://challenges.cloudflare.com/59423525-bf88-4071-b6a7-a8122b5f6cb00 KB—✓3rd
blob:https://challenges.cloudflare.com/7043d153-2282-49fe-8419-a5da444bf430-0 KB—✓3rd
blob:https://challenges.cloudflare.com/7043d153-2282-49fe-8419-a5da444bf430-0 KB—✓3rd
blob:https://challenges.cloudflare.com/7043d153-2282-49fe-8419-a5da444bf430-0 KB—✓3rd
blob:https://challenges.cloudflare.com/7043d153-2282-49fe-8419-a5da444bf430-0 KB—✓3rd
blob:https://challenges.cloudflare.com/7043d153-2282-49fe-8419-a5da444bf430-0 KB—✓3rd
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
23 resources · 796 KB · 0 KB savings available
PASS
23 resources · 796 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 796 KB
Warning::
20 third-party resources (100% of weight)
Info::
1 resources over 200KB
23 resources · 796.1 KiB · 20 third-party Within 1MB page-weight target
Other 37% · 295.7 KiB
Document 33% · 263.0 KiB
Font 18% · 145.8 KiB
JavaScript 11% · 90.5 KiB
Image 0% · 1.2 KiB
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
23 requests over 3210ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 720 ms LCP 820 mshttps://upwork.com// https://upwork.com/ — 301 — 578 B — 71 ms — h3https://www.upwork.com/www.upwork.com/ https://www.upwork.com/ — 307 — 60 B — 30 ms — http/1.1https://upwork.com// https://upwork.com/ — 301 — 0 B — 1 ms — h3https://www.upwork.com/www.upwork.com/ https://www.upwork.com/ — 403 — 168.1 KiB — 28 ms — h3data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCAxM…data:image/svg+xml;base64,PHN2ZyB4b... data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHZpZXdCb3g9IjAgMCAxM… — 200 — 0 B — 0 ms — datadata:font/woff2;base64,d09GMgABAAAAAkcgABIAAAAGMigAAkayAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGoPwKhuJlCQc…data:font/woff2;base64,d09GMgABAAAA... data:font/woff2;base64,d09GMgABAAAAAkcgABIAAAAGMigAAkayAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGoPwKhuJlCQc… — 200 — 145.8 KiB — 27 ms — datahttps://www.upwork.com/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9ed5342c28546798www.upwork.com/cdn-cgi/challenge-pl... https://www.upwork.com/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=9ed5342c28546798 — 200 — 73.2 KiB — 18 ms — h3blob:https://www.upwork.com/1ac2c366-75f2-46b6-a27b-24f6af46cb71www.upwork.com/1ac2c366-75f2-46b6-a... blob:https://www.upwork.com/1ac2c366-75f2-46b6-a27b-24f6af46cb71 — -1 — 0 B — 0 ms — https://challenges.cloudflare.com/turnstile/v0/g/b0a7532ac8ec/api.js?onload=cFyL2&render=explicitchallenges.cloudflare.com/turnstile... https://challenges.cloudflare.com/turnstile/v0/g/b0a7532ac8ec/api.js?onload=cFyL2&render=explicit — 200 — 17.4 KiB — 42 ms — h3https://upwork.com/favicon.ico/favicon.ico https://upwork.com/favicon.ico — -1 — 0 B — 14 ms — https://www.upwork.com/cdn-cgi/challenge-platform/h/g/flow/ov1/1336492700:1776363125:Ftrxf4L2JJi7wh9a8zMMSEcREc7JleeP2QdTTOPafQM/9ed5342c28546798/CnKBUPauO_.DNiXS4jwq98PnC_LFBa9_9a1rK.TdV5o-1776363624-1.2.1.1-QJbNYfLnUGrTXbmwGQb.Tm4eA9KzmfBi5OFhNKvtSoFEtqX_MlpmFjFMdJ9FZPpnwww.upwork.com/cdn-cgi/challenge-pl... https://www.upwork.com/cdn-cgi/challenge-platform/h/g/flow/ov1/1336492700:1776363125:Ftrxf4L2JJi7wh9a8zMMSEcREc7JleeP2QdTTOPafQM/9ed5342c28546798/CnKBUPauO_.DNiXS4jwq98PnC_LFBa9_9a1rK.TdV5o-1776363624-1.2.1.1-QJbNYfLnUGrTXbmwGQb.Tm4eA9KzmfBi5OFhNKvtSoFEtqX_MlpmFjFMdJ9FZPpn — 200 — 13.7 KiB — 24 ms — h3blob:https://www.upwork.com/8ef40deb-f8ff-48e1-a5fe-47046aaef953www.upwork.com/8ef40deb-f8ff-48e1-a... blob:https://www.upwork.com/8ef40deb-f8ff-48e1-a5fe-47046aaef953 — 200 — -1 B — 34 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/turnstile/f/ov2/av0/rch/vsf6c/0x4AAAAAAADnPIDROrmt1Wwj/light/fbE/new/normal?lang=autochallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/turnstile/f/ov2/av0/rch/vsf6c/0x4AAAAAAADnPIDROrmt1Wwj/light/fbE/new/normal?lang=auto — 200 — 94.4 KiB — 32 ms — h3https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/cmg/1challenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/cmg/1 — 200 — 208 B — 9 ms — h3blob:https://challenges.cloudflare.com/59423525-bf88-4071-b6a7-a8122b5f6cb0challenges.cloudflare.com/59423525-... blob:https://challenges.cloudflare.com/59423525-bf88-4071-b6a7-a8122b5f6cb0 — -1 — 0 B — 0 ms — https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/flow/ov1/2665393735:1776359655:-yZ21BwzAphqzXrHgKcxOX77RkXAL9rAafXdddf9JJc/9ed5342ee949df5d/ji9mrYkngmFbXRzNzLkYAGLQ39TV9swD6Rnsu0C1DPk-1776363624-1.2.1.1-NyPUSQlLANE6GgpMzdFq_wBe35rVTjnjzYl9viqV9bGwhqaIU_rtudoCAzdhT5Hychallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/flow/ov1/2665393735:1776359655:-yZ21BwzAphqzXrHgKcxOX77RkXAL9rAafXdddf9JJc/9ed5342ee949df5d/ji9mrYkngmFbXRzNzLkYAGLQ39TV9swD6Rnsu0C1DPk-1776363624-1.2.1.1-NyPUSQlLANE6GgpMzdFq_wBe35rVTjnjzYl9viqV9bGwhqaIU_rtudoCAzdhT5Hy — 200 — 280.2 KiB — 102 ms — h3blob:https://challenges.cloudflare.com/7043d153-2282-49fe-8419-a5da444bf430challenges.cloudflare.com/7043d153-... blob:https://challenges.cloudflare.com/7043d153-2282-49fe-8419-a5da444bf430 — 200 — -1 B — 108 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/pat/9ed5342ee949df5d/1776363625123/1018dd9dc36eb46935af13ffa95d0b00072d856cee6b34bb9268f88561bab108/AFET758Q5evltTgchallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/pat/9ed5342ee949df5d/1776363625123/1018dd9dc36eb46935af13ffa95d0b00072d856cee6b34bb9268f88561bab108/AFET758Q5evltTg — 401 — 1.7 KiB — 12 ms — h3blob:https://challenges.cloudflare.com/7043d153-2282-49fe-8419-a5da444bf430challenges.cloudflare.com/7043d153-... blob:https://challenges.cloudflare.com/7043d153-2282-49fe-8419-a5da444bf430 — 200 — -1 B — 36 ms — blobblob:https://challenges.cloudflare.com/7043d153-2282-49fe-8419-a5da444bf430challenges.cloudflare.com/7043d153-... blob:https://challenges.cloudflare.com/7043d153-2282-49fe-8419-a5da444bf430 — 200 — -1 B — 56 ms — blobblob:https://challenges.cloudflare.com/7043d153-2282-49fe-8419-a5da444bf430challenges.cloudflare.com/7043d153-... blob:https://challenges.cloudflare.com/7043d153-2282-49fe-8419-a5da444bf430 — 200 — -1 B — 51 ms — blobblob:https://challenges.cloudflare.com/7043d153-2282-49fe-8419-a5da444bf430challenges.cloudflare.com/7043d153-... blob:https://challenges.cloudflare.com/7043d153-2282-49fe-8419-a5da444bf430 — 200 — -1 B — 49 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/d/9ed5342ee949df5d/1776363625123/S60FWafzUTHcNHYchallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/d/9ed5342ee949df5d/1776363625123/S60FWafzUTHcNHY — 200 — 1004 B — 8 ms — h3
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 560ms · 241KB · $7/mo
www.upwork.com
Other
Costly
Execution 428ms
Transfer 73 KB
Monthly Cost $6/mo
www.upwork.com
Other
Optional
Execution 67ms
Transfer 168 KB
Monthly Cost $1/mo
Unattributable
Other
Optional
Execution 65ms
Transfer 0 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.upwork.com adds 428ms and costs ~$6/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.upwork.com takes 428ms 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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