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https://easychair.org

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
93
GRADE
A
FIX
1
REVIEW
2
PASS
10
INFO
2

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

Mobile Desktop
80
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
87
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.
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.

1.76 s

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

2.21 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.

0.008

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

1.90 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.

2.21 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
10 PASS 2 REVIEW 1 FIX
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
57 images, 0 KB saveable
REVIEW
57 images, 0 KB saveable
Warning::
https://easychair.org/images/registration-icon.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/Michigan.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/Oxford.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/Berkeley.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/smartCFP-icon.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/Stanford.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/in-icon.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/Melbourne.pn... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/Peking.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/Fraunhofer.p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/Toronto.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/chairEC.gif is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/IEEE-CS.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/NUS.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/twitter-icon.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/logoEC.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/Tsinghua.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/KAIST.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/ETH.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/MaxPlanck.pn... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/publishing-icon.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/Google.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/MIT.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/smartslide-icon.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/IBM.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/Milano.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/Tokyo.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/Taiwan.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/Cambridge.pn... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/Colombia.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/Intel.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/Shanghai.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/UiTM.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/SanPaulo.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/testimonials/1.jpg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/Harvard.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/ACM-logo.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/management-icon.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://easychair.org/images/customer/Microsoft.pn... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
57 images 920 KB
0 oversized -0 KB
57 legacy format
39 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

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

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

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

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

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

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

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

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

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
Page Weight Budget
1003 KB transferred, 65 requests
PASS
1003 KB transferred, 65 requests
Info::
Page weighs 1.1 MB (1003 KB transferred)
Info::
65 HTTP requests
Info::
Estimated 0.21 g CO2 per page load
1003 KB / 2.4 MB budget
1003 KB transferred
65 requests
0.21 g CO2 per page load
Images 920.3 KiB 92%
Fonts 42.0 KiB 4%
JavaScript 20.1 KiB 2%
CSS 12.3 KiB 1%
HTML 5.8 KiB 1%
Other 2.3 KiB 0%
0 2.4 MB 4.9 MB
Under budget
A+
Third-Party Impact
5% third-party, 0 ms blocking
PASS
5% third-party, 0 ms blocking
Info::
Third-party code accounts for 5% of page weight (45.7 KiB of 1002.7 KiB)
Info::
Third-party blocking time is low (0 ms)
95%
First-party Third-party
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+
JS Execution Cost
193ms total JS execution
PASS
193ms total JS execution
Info::
https://easychair.org/: 101ms CPU time
Info::
Unattributable: 92ms CPU time
Info::
Third-party scripts: 92ms (48% of total)

Main Thread Breakdown

Other 52% Style & Layout 25% Rendering 13% Parse HTML & CSS 5% Script Evaluation 3%
ScriptTotalScriptingParse/CompileParty
https://easychair.org/101ms2ms1ms1st
Unattributable92ms2ms0ms3rd
A+
Font Loading
1 fonts (42 KB)
PASS
1 fonts (42 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

42 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 1.5 s 2.0 s FCP 1.8 s LCP 2.2 shttps://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2memvYaGs126MiZpBA-UvWbX... https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 42.0 KiB — 7 ms — font-display: swap
memvYaGs126MiZpBA-UvWbX... woff2 swap
Size 42 KB
Load time 7 ms
Start 1.4 s
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
JS Bundles
2 scripts, 0 KB unused
PASS
2 scripts, 0 KB unused
Warning::
https://easychair.org/js/easy.js?version=534: unminified — 8 KB could be saved
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://easychair.org/js/easy.js?version=53419 KB—✗1st
https://easychair.org/js/home.js?version=5341 KB—✓1st
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
65 resources · 1003 KB · 0 KB savings available
PASS
65 resources · 1003 KB · 0 KB savings available
Info::
Within 1MB page-weight target
Got: 1003 KB
Info::
3 third-party resources (5% of weight)
65 resources · 1002.7 KiB · 3 third-party Within 1MB page-weight target
Image 92% · 922.6 KiB
Font 4% · 42.0 KiB
JavaScript 2% · 20.1 KiB
CSS 1% · 12.3 KiB
Document 1% · 5.8 KiB
Network Waterfall
65 requests over 3567ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 1.8 s LCP 2.2 shttps://easychair.org// https://easychair.org/ — 200 — 5.8 KiB — 730 ms — http/1.1https://easychair.org/css/home.css?version=534/css/home.css?version=534 https://easychair.org/css/home.css?version=534 — 200 — 8.6 KiB — 203 ms — http/1.1https://easychair.org/js/easy.js?version=534/js/easy.js?version=534 https://easychair.org/js/easy.js?version=534 — 200 — 19.0 KiB — 408 ms — http/1.1https://easychair.org/js/home.js?version=534/js/home.js?version=534 https://easychair.org/js/home.js?version=534 — 200 — 1.2 KiB — 597 ms — http/1.1https://easychair.org/images/logoEC.png/images/logoEC.png https://easychair.org/images/logoEC.png — 200 — 30.0 KiB — 791 ms — http/1.1https://easychair.org/images/management-icon.png/images/management-icon.png https://easychair.org/images/management-icon.png — 200 — 4.1 KiB — 597 ms — http/1.1https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;700&display=swapfonts.googleapis.com/css2?family=Op... https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;700&display=swap — 200 — 2.1 KiB — 124 ms — h2https://fonts.googleapis.com/css2?family=Roboto:wght@300&display=swapfonts.googleapis.com/css2?family=Ro... https://fonts.googleapis.com/css2?family=Roboto:wght@300&display=swap — 200 — 1.6 KiB — 127 ms — h2https://easychair.org/images/registration-icon.png/images/registration-icon.png https://easychair.org/images/registration-icon.png — 200 — 5.1 KiB — 201 ms — http/1.1https://easychair.org/images/publishing-icon.png/images/publishing-icon.png https://easychair.org/images/publishing-icon.png — 200 — 1.7 KiB — 203 ms — http/1.1https://easychair.org/images/smartCFP-icon.png/images/smartCFP-icon.png https://easychair.org/images/smartCFP-icon.png — 200 — 1.9 KiB — 207 ms — http/1.1https://easychair.org/images/smartslide-icon.png/images/smartslide-icon.png https://easychair.org/images/smartslide-icon.png — 200 — 2.7 KiB — 207 ms — http/1.1https://easychair.org/images/customer/Microsoft.png/images/customer/Microsoft.png https://easychair.org/images/customer/Microsoft.png — 200 — 9.5 KiB — 405 ms — http/1.1https://easychair.org/images/i-pubs.png/images/i-pubs.png https://easychair.org/images/i-pubs.png — 200 — 636 B — 342 ms — http/1.1https://easychair.org/images/i-cfp.png/images/i-cfp.png https://easychair.org/images/i-cfp.png — 200 — 814 B — 354 ms — http/1.1https://easychair.org/images/image-vcs-ad.jpg/images/image-vcs-ad.jpg https://easychair.org/images/image-vcs-ad.jpg — 200 — 84.6 KiB — 747 ms — http/1.1https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2fonts.gstatic.com/s/opensans/v44/me... https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 200 — 42.0 KiB — 7 ms — h3https://easychair.org/images/customer/Google.png/images/customer/Google.png https://easychair.org/images/customer/Google.png — 200 — 11.4 KiB — 201 ms — http/1.1https://easychair.org/images/customer/IBM.png/images/customer/IBM.png https://easychair.org/images/customer/IBM.png — 200 — 1.6 KiB — 381 ms — http/1.1https://easychair.org/images/customer/Intel.png/images/customer/Intel.png https://easychair.org/images/customer/Intel.png — 200 — 5.1 KiB — 213 ms — http/1.1https://easychair.org/images/customer/ACM-logo.png/images/customer/ACM-logo.png https://easychair.org/images/customer/ACM-logo.png — 200 — 12.5 KiB — 198 ms — http/1.1https://easychair.org/images/customer/IEEE-CS.png/images/customer/IEEE-CS.png https://easychair.org/images/customer/IEEE-CS.png — 200 — 22.3 KiB — 198 ms — http/1.1https://easychair.org/images/customer/Harvard.png/images/customer/Harvard.png https://easychair.org/images/customer/Harvard.png — 200 — 56.3 KiB — 395 ms — http/1.1https://easychair.org/images/customer/MIT.png/images/customer/MIT.png https://easychair.org/images/customer/MIT.png — 200 — 16.5 KiB — 200 ms — http/1.1https://easychair.org/images/customer/Stanford.png/images/customer/Stanford.png https://easychair.org/images/customer/Stanford.png — 200 — 13.0 KiB — 200 ms — http/1.1https://easychair.org/images/customer/Berkeley.png/images/customer/Berkeley.png https://easychair.org/images/customer/Berkeley.png — 200 — 12.8 KiB — 200 ms — http/1.1https://easychair.org/images/customer/Michigan.png/images/customer/Michigan.png https://easychair.org/images/customer/Michigan.png — 200 — 10.4 KiB — 198 ms — http/1.1https://easychair.org/images/customer/Toronto.png/images/customer/Toronto.png https://easychair.org/images/customer/Toronto.png — 200 — 3.0 KiB — 199 ms — http/1.1https://easychair.org/images/customer/Tokyo.png/images/customer/Tokyo.png https://easychair.org/images/customer/Tokyo.png — 200 — 15.5 KiB — 198 ms — http/1.1https://easychair.org/images/customer/Melbourne.png/images/customer/Melbourne.png https://easychair.org/images/customer/Melbourne.png — 200 — 42.8 KiB — 394 ms — http/1.1
0 ms 1.0 s 2.0 s 3.0 s FCP 1.8 s LCP 2.2 shttps://easychair.org// https://easychair.org/ — 200 — 5.8 KiB — 730 ms — http/1.1https://easychair.org/css/home.css?version=534/css/home.css?version=534 https://easychair.org/css/home.css?version=534 — 200 — 8.6 KiB — 203 ms — http/1.1https://easychair.org/js/easy.js?version=534/js/easy.js?version=534 https://easychair.org/js/easy.js?version=534 — 200 — 19.0 KiB — 408 ms — http/1.1https://easychair.org/js/home.js?version=534/js/home.js?version=534 https://easychair.org/js/home.js?version=534 — 200 — 1.2 KiB — 597 ms — http/1.1https://easychair.org/images/logoEC.png/images/logoEC.png https://easychair.org/images/logoEC.png — 200 — 30.0 KiB — 791 ms — http/1.1https://easychair.org/images/management-icon.png/images/management-icon.png https://easychair.org/images/management-icon.png — 200 — 4.1 KiB — 597 ms — http/1.1https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;700&display=swapfonts.googleapis.com/css2?family=Op... https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;700&display=swap — 200 — 2.1 KiB — 124 ms — h2https://fonts.googleapis.com/css2?family=Roboto:wght@300&display=swapfonts.googleapis.com/css2?family=Ro... https://fonts.googleapis.com/css2?family=Roboto:wght@300&display=swap — 200 — 1.6 KiB — 127 ms — h2https://easychair.org/images/registration-icon.png/images/registration-icon.png https://easychair.org/images/registration-icon.png — 200 — 5.1 KiB — 201 ms — http/1.1https://easychair.org/images/publishing-icon.png/images/publishing-icon.png https://easychair.org/images/publishing-icon.png — 200 — 1.7 KiB — 203 ms — http/1.1https://easychair.org/images/smartCFP-icon.png/images/smartCFP-icon.png https://easychair.org/images/smartCFP-icon.png — 200 — 1.9 KiB — 207 ms — http/1.1https://easychair.org/images/smartslide-icon.png/images/smartslide-icon.png https://easychair.org/images/smartslide-icon.png — 200 — 2.7 KiB — 207 ms — http/1.1https://easychair.org/images/customer/Microsoft.png/images/customer/Microsoft.png https://easychair.org/images/customer/Microsoft.png — 200 — 9.5 KiB — 405 ms — http/1.1https://easychair.org/images/i-pubs.png/images/i-pubs.png https://easychair.org/images/i-pubs.png — 200 — 636 B — 342 ms — http/1.1https://easychair.org/images/i-cfp.png/images/i-cfp.png https://easychair.org/images/i-cfp.png — 200 — 814 B — 354 ms — http/1.1https://easychair.org/images/image-vcs-ad.jpg/images/image-vcs-ad.jpg https://easychair.org/images/image-vcs-ad.jpg — 200 — 84.6 KiB — 747 ms — http/1.1https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2fonts.gstatic.com/s/opensans/v44/me... https://fonts.gstatic.com/s/opensans/v44/memvYaGs126MiZpBA-UvWbX2vVnXBbObj2OVTS-mu0SC55I.woff2 — 200 — 42.0 KiB — 7 ms — h3https://easychair.org/images/customer/Google.png/images/customer/Google.png https://easychair.org/images/customer/Google.png — 200 — 11.4 KiB — 201 ms — http/1.1https://easychair.org/images/customer/IBM.png/images/customer/IBM.png https://easychair.org/images/customer/IBM.png — 200 — 1.6 KiB — 381 ms — http/1.1https://easychair.org/images/customer/Intel.png/images/customer/Intel.png https://easychair.org/images/customer/Intel.png — 200 — 5.1 KiB — 213 ms — http/1.1https://easychair.org/images/customer/ACM-logo.png/images/customer/ACM-logo.png https://easychair.org/images/customer/ACM-logo.png — 200 — 12.5 KiB — 198 ms — http/1.1https://easychair.org/images/customer/IEEE-CS.png/images/customer/IEEE-CS.png https://easychair.org/images/customer/IEEE-CS.png — 200 — 22.3 KiB — 198 ms — http/1.1https://easychair.org/images/customer/Harvard.png/images/customer/Harvard.png https://easychair.org/images/customer/Harvard.png — 200 — 56.3 KiB — 395 ms — http/1.1https://easychair.org/images/customer/MIT.png/images/customer/MIT.png https://easychair.org/images/customer/MIT.png — 200 — 16.5 KiB — 200 ms — http/1.1https://easychair.org/images/customer/Stanford.png/images/customer/Stanford.png https://easychair.org/images/customer/Stanford.png — 200 — 13.0 KiB — 200 ms — http/1.1https://easychair.org/images/customer/Berkeley.png/images/customer/Berkeley.png https://easychair.org/images/customer/Berkeley.png — 200 — 12.8 KiB — 200 ms — http/1.1https://easychair.org/images/customer/Michigan.png/images/customer/Michigan.png https://easychair.org/images/customer/Michigan.png — 200 — 10.4 KiB — 198 ms — http/1.1https://easychair.org/images/customer/Toronto.png/images/customer/Toronto.png https://easychair.org/images/customer/Toronto.png — 200 — 3.0 KiB — 199 ms — http/1.1https://easychair.org/images/customer/Tokyo.png/images/customer/Tokyo.png https://easychair.org/images/customer/Tokyo.png — 200 — 15.5 KiB — 198 ms — http/1.1https://easychair.org/images/customer/Melbourne.png/images/customer/Melbourne.png https://easychair.org/images/customer/Melbourne.png — 200 — 42.8 KiB — 394 ms — http/1.1https://easychair.org/images/customer/Tsinghua.png/images/customer/Tsinghua.png https://easychair.org/images/customer/Tsinghua.png — 200 — 4.1 KiB — 202 ms — http/1.1https://easychair.org/images/customer/Peking.png/images/customer/Peking.png https://easychair.org/images/customer/Peking.png — 200 — 23.3 KiB — 198 ms — http/1.1https://easychair.org/images/customer/NUS.png/images/customer/NUS.png https://easychair.org/images/customer/NUS.png — 200 — 47.9 KiB — 393 ms — http/1.1https://easychair.org/images/customer/Shanghai.png/images/customer/Shanghai.png https://easychair.org/images/customer/Shanghai.png — 200 — 7.2 KiB — 199 ms — http/1.1https://easychair.org/images/customer/Taiwan.png/images/customer/Taiwan.png https://easychair.org/images/customer/Taiwan.png — 200 — 22.8 KiB — 198 ms — http/1.1https://easychair.org/images/customer/KAIST.png/images/customer/KAIST.png https://easychair.org/images/customer/KAIST.png — 200 — 25.8 KiB — 198 ms — http/1.1https://easychair.org/images/customer/UiTM.png/images/customer/UiTM.png https://easychair.org/images/customer/UiTM.png — 200 — 69.4 KiB — 400 ms — http/1.1https://easychair.org/images/customer/Oxford.png/images/customer/Oxford.png https://easychair.org/images/customer/Oxford.png — 200 — 13.4 KiB — 199 ms — http/1.1https://easychair.org/images/customer/Cambridge.png/images/customer/Cambridge.png https://easychair.org/images/customer/Cambridge.png — 200 — 33.1 KiB — 198 ms — http/1.1https://easychair.org/images/customer/MaxPlanck.png/images/customer/MaxPlanck.png https://easychair.org/images/customer/MaxPlanck.png — 200 — 14.7 KiB — 198 ms — http/1.1https://easychair.org/images/customer/Fraunhofer.png/images/customer/Fraunhofer.png https://easychair.org/images/customer/Fraunhofer.png — 200 — 2.7 KiB — 198 ms — http/1.1https://easychair.org/images/customer/ETH.png/images/customer/ETH.png https://easychair.org/images/customer/ETH.png — 200 — 890 B — 204 ms — http/1.1https://easychair.org/images/customer/Milano.png/images/customer/Milano.png https://easychair.org/images/customer/Milano.png — 200 — 61.9 KiB — 396 ms — http/1.1https://easychair.org/images/customer/SanPaulo.png/images/customer/SanPaulo.png https://easychair.org/images/customer/SanPaulo.png — 200 — 5.8 KiB — 199 ms — http/1.1https://easychair.org/images/customer/Colombia.png/images/customer/Colombia.png https://easychair.org/images/customer/Colombia.png — 200 — 33.9 KiB — 198 ms — http/1.1https://easychair.org/images/testimonials/1.jpg/images/testimonials/1.jpg https://easychair.org/images/testimonials/1.jpg — 200 — 34.0 KiB — 200 ms — http/1.1https://easychair.org/images/testimonials/5.jpg/images/testimonials/5.jpg https://easychair.org/images/testimonials/5.jpg — 200 — 11.5 KiB — 203 ms — http/1.1https://easychair.org/images/testimonials/blank.jpg/images/testimonials/blank.jpg https://easychair.org/images/testimonials/blank.jpg — 200 — 4.7 KiB — 207 ms — http/1.1https://easychair.org/images/testimonials/4.jpg/images/testimonials/4.jpg https://easychair.org/images/testimonials/4.jpg — 200 — 8.0 KiB — 199 ms — http/1.1https://easychair.org/images/testimonials/10.jpg/images/testimonials/10.jpg https://easychair.org/images/testimonials/10.jpg — 200 — 57.1 KiB — 200 ms — http/1.1https://easychair.org/images/testimonials/6.jpg/images/testimonials/6.jpg https://easychair.org/images/testimonials/6.jpg — 200 — 13.5 KiB — 198 ms — http/1.1https://easychair.org/images/testimonials/7.jpg/images/testimonials/7.jpg https://easychair.org/images/testimonials/7.jpg — 200 — 6.9 KiB — 199 ms — http/1.1https://easychair.org/images/testimonials/3.jpg/images/testimonials/3.jpg https://easychair.org/images/testimonials/3.jpg — 200 — 16.8 KiB — 200 ms — http/1.1https://easychair.org/images/testimonials/2.jpg/images/testimonials/2.jpg https://easychair.org/images/testimonials/2.jpg — 200 — 9.1 KiB — 199 ms — http/1.1https://easychair.org/images/testimonials/9.jpg/images/testimonials/9.jpg https://easychair.org/images/testimonials/9.jpg — 200 — 9.6 KiB — 198 ms — http/1.1https://easychair.org/images/testimonials/8.jpg/images/testimonials/8.jpg https://easychair.org/images/testimonials/8.jpg — 200 — 9.8 KiB — 198 ms — http/1.1https://easychair.org/images/in-icon.png/images/in-icon.png https://easychair.org/images/in-icon.png — 200 — 1.1 KiB — 198 ms — http/1.1https://easychair.org/images/twitter-icon.png/images/twitter-icon.png https://easychair.org/images/twitter-icon.png — 200 — 2.4 KiB — 198 ms — http/1.1https://easychair.org/images/chairEC.gif/images/chairEC.gif https://easychair.org/images/chairEC.gif — 200 — 677 B — 200 ms — http/1.1https://easychair.org/images/cross.png/images/cross.png https://easychair.org/images/cross.png — 200 — 649 B — 206 ms — http/1.1https://easychair.org/images/cross_light.png/images/cross_light.png https://easychair.org/images/cross_light.png — 200 — 864 B — 205 ms — http/1.1https://easychair.org/images/notification_success.png/images/notification_success.png https://easychair.org/images/notification_success.png — 200 — 937 B — 205 ms — http/1.1https://easychair.org/images/notification_warning.png/images/notification_warning.png https://easychair.org/images/notification_warning.png — 200 — 877 B — 205 ms — http/1.1https://easychair.org/images/notification_error.png/images/notification_error.png https://easychair.org/images/notification_error.png — 200 — 952 B — 205 ms — http/1.1https://easychair.org/images/favicon.ico/images/favicon.ico https://easychair.org/images/favicon.ico — 200 — 2.3 KiB — 203 ms — http/1.1
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
48% of JavaScript execution is third-party
First-party Third-party 92ms · 0KB · €1/mo
Unattributable
Other
Optional
Execution 92ms
Transfer 0 KB
Monthly Cost €1/mo

48% of JavaScript execution time comes from third-party scripts.

Why this matters

Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.

Learn more ▾

Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.

Source: web.dev / HTTP Archive Web Almanac

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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