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https://irena.org

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
80
GRADE
B
FIX
4
REVIEW
3
PASS
8
INFO
2

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

Mobile Desktop
0
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
75
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.
91
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.

2.95 s

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

0 ms

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.

0.000

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

4.82 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.

0 ms

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
17
8 PASS 3 REVIEW 4 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 (1.4 MiB of 1.4 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
9798ms total JS execution
FIX
9798ms total JS execution
Warning::
https://www.irena.org/?appgw_azwaf_jsc=tFA4qNJWqh1...: 7732ms CPU time
Warning::
Unattributable: 417ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-7W6Z...: 410ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-PR8...: 405ms CPU time
Warning::
https://www.irena.org/appgwazwaf/jsc/challenge.32b...: 339ms CPU time
Warning::
Third-party scripts: 9798ms (100% of total)

Main Thread Breakdown

Script Evaluation 80% Other 8% Style & Layout 5% Script Parsing & Compilation 3%
ScriptTotalScriptingParse/CompileParty
https://www.irena.org/?appgw_azwaf_jsc=tFA4qNJWqh1Qo2B2IebdJ6eO0wPVZaUfRmTz1mQZIGvxYnzAuIiS3HhrUgpyC-KIaErYmkaDZKapjk_NgL3UlBiZwP8FsZuiLlG7yquJEIJhhibfblPQemkj1wo_3PaNFkq8Sw4jmr7a3fMPjAw4yddYKqoFgj-H1m6gdJZJ-c1VpcSNMtw0SH_hCeJB5DHjlkyQNlzzFU2fa1XpGvWwBqg5rPpg4NV-giqaC5-KSeHhn1cqNqR_ieke9xQpHsetnyEuYwK3kW7uV4zH7O_SnSJTuPncLAocD337k8qa1VbhfjWzQ2kcIsLOXhE57lxpFCGnmAFKXN93-SYaJNMAwg7732ms6663ms5ms3rd
Unattributable417ms11ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-7W6ZEF19K4&cx=c&gtm=4e64k0410ms344ms61ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PR8BPS9405ms320ms62ms3rd
https://www.irena.org/appgwazwaf/jsc/challenge.32b5cf3855cc1910a015.js339ms283ms50ms3rd
https://www.irena.org/assets/js/app.js?v=81387877212ms165ms37ms3rd
https://www.google-analytics.com/analytics.js193ms138ms29ms3rd
https://form-assets.mailchimp.com/snippet/account/95698597?site=17b1ef59262938e5fb148f7a390ms1ms88ms3rd
D
Page Weight Inventory
Action
78 resources · 1.4 MB · 0 KB savings available
FIX
78 resources · 1.4 MB · 0 KB savings available
Warning::
Page weight 445 KB over 1MB target
Got: 1.4 MB Expected: ≤ 1 MB
Warning::
77 third-party resources (100% of weight)
78 resources · 1.4 MiB · 77 third-party 445.3 KiB over 1MB target
JavaScript 50% · 736.9 KiB
Image 15% · 214.2 KiB
Font 12% · 181.0 KiB
Document 12% · 170.1 KiB
CSS 11% · 166.8 KiB
Other 0% · 451 B
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
Page Weight Budget
1.4 MB transferred, 78 requests
REVIEW
1.4 MB transferred, 78 requests
Info::
Page weighs 7.2 MB (1.4 MB transferred)
Warning::
JavaScript is 737 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 737 KB
Info::
78 HTTP requests
Info::
Estimated 0.30 g CO2 per page load
1.4 MB / 2.4 MB budget
1.4 MB transferred
78 requests
0.30 g CO2 per page load
JavaScript 736.9 KiB 50%
Images 199.8 KiB 14%
Fonts 181.0 KiB 12%
CSS 166.8 KiB 11%
HTML 151.7 KiB 10%
Other 23.5 KiB 2%
Other 9.3 KiB 1%
Other 451 B 0%
Other 0 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Under 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

C
Image Optimization
Action
24 images, 0 KB saveable
REVIEW
24 images, 0 KB saveable
Warning::
https://www.irena.org/-/media/Images/IRENA/Agency/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.irena.org/-/media/Images/IRENA/Agency/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.irena.org/-/media/Images/IRENA/Agency/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.irena.org/-/media/Images/IRENA/Agency/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.irena.org/-/media/Irena/Modules-Conten... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.irena.org/-/media/Examples/Irena/Image... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.irena.org/-/media/Images/IRENA/Agency/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.irena.org/-/media/Images/IRENA/Agency/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.irena.org/-/media/Images/IRENA/Agency/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.irena.org/-/media/Images/IRENA/Agency/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.irena.org/-/media/Images/IRENA/Agency/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
24 images 200 KB
0 oversized -0 KB
5 legacy format
12 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

Performance issues directly impact user engagement and conversion rates.

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+
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
6 fonts (181 KB)
PASS
6 fonts (181 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

181 KB total

Render-blocking

0

of 6

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 2.9 shttps://www.irena.org/assets/fonts/Graphik/Graphik-Light.woff2Graphik-Light.woff2 https://www.irena.org/assets/fonts/Graphik/Graphik-Light.woff2 — 36.8 KiB — 146 ms — font-display: swaphttps://www.irena.org/assets/fonts/Graphik/Graphik-Semibold.woff2Graphik-Semibold.woff2 https://www.irena.org/assets/fonts/Graphik/Graphik-Semibold.woff2 — 37.7 KiB — 274 ms — font-display: swaphttps://www.irena.org/assets/fonts/Graphik/Graphik-Bold.woff2Graphik-Bold.woff2 https://www.irena.org/assets/fonts/Graphik/Graphik-Bold.woff2 — 37.6 KiB — 565 ms — font-display: swaphttps://www.irena.org/assets/fonts/Graphik/Graphik-Regular.woff2Graphik-Regular.woff2 https://www.irena.org/assets/fonts/Graphik/Graphik-Regular.woff2 — 35.1 KiB — 285 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 67 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 0 B — 77 ms — font-display: swap
Graphik-Light.woff2 woff2 swap
Size 37 KB
Load time 146 ms
Start 4.1 s
Risk FOUT — text flashes from fallback to web font
Graphik-Semibold.woff2 woff2 swap
Size 38 KB
Load time 274 ms
Start 4.1 s
Risk FOUT — text flashes from fallback to web font
Graphik-Bold.woff2 woff2 swap
Size 38 KB
Load time 565 ms
Start 4.1 s
Risk FOUT — text flashes from fallback to web font
Graphik-Regular.woff2 woff2 swap
Size 35 KB
Load time 285 ms
Start 4.6 s
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 67 ms
Start 4.7 s
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 0 KB
Load time 77 ms
Start 4.7 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
27 scripts, 0 KB unused
PASS
27 scripts, 0 KB unused
0 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.irena.org/appgwazwaf/jsc/challenge.32b5cf3855cc1910a015.js127 KB—✓3rd
https://www.irena.org/assets/js/app.js?v=8138787748 KB—✓3rd
https://www.clarity.ms/tag/ufn5mhzznt0 KB—✓3rd
https://chimpstatic.com/mcjs-connected/js/users/58854272bde93aba940164cee/17b1ef59262938e5fb148f7a3.js2 KB—✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-PR8BPS9136 KB—✓3rd
https://form-assets.mailchimp.com/snippet/account/95698597?site=17b1ef59262938e5fb148f7a3109 KB—✓3rd
https://www.youtube.com/s/player/1bb6ee63/player_embed_es6.vflset/en_US/base.js0 KB—✓3rd
https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.5f0apfZzpOA.2021.O/am=AAAABA/d=1/br=1/rs=AGKMywFg3MG1UeKh8ePjbhY_YEMv-NHjmA/m=root,base140 KB—✓3rd
https://www.youtube.com/s/_/ytembeds/_/js/k=ytembeds.base.en_US.5f0apfZzpOA.2021.O/am=AAAABA/d=1/br=1/rs=AGKMywFg3MG1UeKh8ePjbhY_YEMv-NHjmA/m=root,base0 KB—✓3rd
https://www.youtube.com/s/player/1bb6ee63/player_embed_es6.vflset/en_US/base.js0 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+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
78 requests over 5042ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 2.9 shttps://irena.org// https://irena.org/ — 301 — 165 B — 240 ms — h2https://www.irena.org/www.irena.org/ https://www.irena.org/ — 403 — 9.0 KiB — 417 ms — http/1.1https://www.irena.org/appgwazwaf/jsc/tp/index.gif?azureRef=81ed7957ea6d8a678acafbbafa90d2f9www.irena.org/appgwazwaf/jsc/tp/ind... https://www.irena.org/appgwazwaf/jsc/tp/index.gif?azureRef=81ed7957ea6d8a678acafbbafa90d2f9 — 200 — 221 B — 393 ms — http/1.1https://www.irena.org/appgwazwaf/jsc/challenge.32b5cf3855cc1910a015.jswww.irena.org/appgwazwaf/jsc/challe... https://www.irena.org/appgwazwaf/jsc/challenge.32b5cf3855cc1910a015.js — 200 — 126.6 KiB — 811 ms — http/1.1https://www.irena.org/appgwazwaf/jsc/tp/bundle.gif?azureRef=81ed7957ea6d8a678acafbbafa90d2f9www.irena.org/appgwazwaf/jsc/tp/bun... https://www.irena.org/appgwazwaf/jsc/tp/bundle.gif?azureRef=81ed7957ea6d8a678acafbbafa90d2f9 — 200 — 221 B — 138 ms — http/1.1https://www.irena.org/favicon.icowww.irena.org/favicon.ico https://www.irena.org/favicon.ico — 403 — 9.0 KiB — 134 ms — http/1.1https://www.irena.org/?appgw_azwaf_jsc=tFA4qNJWqh1Qo2B2IebdJ6eO0wPVZaUfRmTz1mQZIGvxYnzAuIiS3HhrUgpyC-KIaErYmkaDZKapjk_NgL3UlBiZwP8FsZuiLlG7yquJEIJhhibfblPQemkj1wo_3PaNFkq8Sw4jmr7a3fMPjAw4yddYKqoFgj-H1m6gdJZJ-c1VpcSNMtw0SH_hCeJB5DHjlkyQNlzzFU2fa1XpGvWwBqg5rPpg4NV-giqaC5-KSeHhn1cqNqR_ieke9xQpHsetnyEuYwK3kW7uV4zH7O_SnSJTuPncLAocD337k8qa1VbhfjWzQ2kcIsLOXhE57lxpFCGnmAFKXN93-SYaJNMAwgwww.irena.org/?appgw_azwaf_jsc=tFA4... https://www.irena.org/?appgw_azwaf_jsc=tFA4qNJWqh1Qo2B2IebdJ6eO0wPVZaUfRmTz1mQZIGvxYnzAuIiS3HhrUgpyC-KIaErYmkaDZKapjk_NgL3UlBiZwP8FsZuiLlG7yquJEIJhhibfblPQemkj1wo_3PaNFkq8Sw4jmr7a3fMPjAw4yddYKqoFgj-H1m6gdJZJ-c1VpcSNMtw0SH_hCeJB5DHjlkyQNlzzFU2fa1XpGvWwBqg5rPpg4NV-giqaC5-KSeHhn1cqNqR_ieke9xQpHsetnyEuYwK3kW7uV4zH7O_SnSJTuPncLAocD337k8qa1VbhfjWzQ2kcIsLOXhE57lxpFCGnmAFKXN93-SYaJNMAwg — 200 — 31.1 KiB — 451 ms — http/1.1https://www.irena.org/assets/fonts/Graphik/Graphik-Light.woff2www.irena.org/assets/fonts/Graphik/... https://www.irena.org/assets/fonts/Graphik/Graphik-Light.woff2 — 200 — 36.8 KiB — 146 ms — http/1.1https://www.irena.org/assets/fonts/Graphik/Graphik-Semibold.woff2www.irena.org/assets/fonts/Graphik/... https://www.irena.org/assets/fonts/Graphik/Graphik-Semibold.woff2 — 200 — 37.7 KiB — 274 ms — http/1.1https://www.irena.org/assets/fonts/Graphik/Graphik-Bold.woff2www.irena.org/assets/fonts/Graphik/... https://www.irena.org/assets/fonts/Graphik/Graphik-Bold.woff2 — 200 — 37.6 KiB — 565 ms — http/1.1https://www.irena.org/assets/styles/default.css?v=81387877www.irena.org/assets/styles/default... https://www.irena.org/assets/styles/default.css?v=81387877 — 200 — 60.3 KiB — 293 ms — http/1.1https://www.irena.org/-/media/Examples/Irena/Images/Navigation/IRENA_logo.svg?la=en&hash=C68751AAB97C5A6B6714D109A3BAC560www.irena.org/-/media/Examples/Iren... https://www.irena.org/-/media/Examples/Irena/Images/Navigation/IRENA_logo.svg?la=en&hash=C68751AAB97C5A6B6714D109A3BAC560 — 200 — 96.0 KiB — 609 ms — http/1.1https://www.irena.org/assets/js/app.js?v=81387877www.irena.org/assets/js/app.js?v=81... https://www.irena.org/assets/js/app.js?v=81387877 — 200 — 48.5 KiB — 662 ms — http/1.1https://www.clarity.ms/tag/ufn5mhzzntwww.clarity.ms/tag/ufn5mhzznt https://www.clarity.ms/tag/ufn5mhzznt — -1 — 0 B — 0 ms — https://www.irena.org/assets/static/site.webmanifestwww.irena.org/assets/static/site.we... https://www.irena.org/assets/static/site.webmanifest — 403 — 9.3 KiB — 461 ms — http/1.1https://chimpstatic.com/mcjs-connected/js/users/58854272bde93aba940164cee/17b1ef59262938e5fb148f7a3.jschimpstatic.com/mcjs-connected/js/u... https://chimpstatic.com/mcjs-connected/js/users/58854272bde93aba940164cee/17b1ef59262938e5fb148f7a3.js — 200 — 1.5 KiB — 165 ms — http/1.1https://www.googletagmanager.com/gtm.js?id=GTM-PR8BPS9www.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-PR8BPS9 — 200 — 135.7 KiB — 112 ms — h2https://www.irena.org/assets/styles/print.css?v=81387877www.irena.org/assets/styles/print.c... https://www.irena.org/assets/styles/print.css?v=81387877 — 200 — 3.1 KiB — 146 ms — http/1.1https://www.irena.org/assets/icons/toolbar.svgwww.irena.org/assets/icons/toolbar.... https://www.irena.org/assets/icons/toolbar.svg — 200 — 2.6 KiB — 143 ms — http/1.1data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACQAAAA0CAYAAADi1poDAAAABHNCSVQICAgIfAhkiAAABrpJREFUW…data:image/png;base64,iVBORw0KGgoAA... data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAACQAAAA0CAYAAADi1poDAAAABHNCSVQICAgIfAhkiAAABrpJREFUW… — 200 — 0 B — 0 ms — datadata:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEYAAAAtCAYAAAATHR0dAAAABHNCSVQICAgIfAhkiAAABZ9JREFUa…data:image/png;base64,iVBORw0KGgoAA... 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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 9798ms · 626KB · $130/mo
www.irena.org
Other
Costly
Execution 7732ms
Transfer 31 KB
Monthly Cost $103/mo
Unattributable
Other
Costly
Execution 417ms
Transfer 0 KB
Monthly Cost $6/mo
Google Tag Manager
Tag Manager
Costly
Execution 410ms
Transfer 154 KB
Monthly Cost $5/mo
Google Tag Manager
Tag Manager
Costly
Execution 405ms
Transfer 136 KB
Monthly Cost $5/mo
www.irena.org
Other
Costly
Execution 339ms
Transfer 127 KB
Monthly Cost $4/mo
www.irena.org
Other
Costly
Execution 212ms
Transfer 48 KB
Monthly Cost $3/mo
Google Analytics
Analytics
Optional
Execution 193ms
Transfer 21 KB
Monthly Cost $3/mo
form-assets.mailchimp.com
Other
Optional
Execution 90ms
Transfer 109 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.irena.org adds 7732ms and costs ~$103/month
  • Unattributable adds 417ms and costs ~$6/month
  • Google Tag Manager adds 410ms and costs ~$5/month
  • Google Tag Manager adds 405ms and costs ~$5/month
  • www.irena.org adds 339ms and costs ~$4/month
  • www.irena.org adds 212ms 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.irena.org takes 7732ms 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 417ms 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

Google Tag Manager takes 410ms 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

Google Tag Manager takes 405ms 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

www.irena.org takes 339ms 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

www.irena.org takes 212ms 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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