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https://www.gov.ie

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
93
GRADE
A
FIX
2
REVIEW
2
PASS
11
INFO
2

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

Mobile Desktop
56
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
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.

3.80 s

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

4.20 s

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

5 ms

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

0.526

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

3.80 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.

4.38 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
17
11 PASS 2 REVIEW 2 FIX
D
Third-Party Impact
Action
76% third-party, 0 ms blocking
FIX
76% third-party, 0 ms blocking
Warning::
Third-party code accounts for 76% of page weight (299.2 KiB of 393.9 KiB)
Info::
Third-party blocking time is low (0 ms)
24%
76%
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
670ms total JS execution
REVIEW
670ms total JS execution
Warning::
https://www.gov.ie/en/: 320ms CPU time
Warning::
Unattributable: 289ms CPU time
Info::
https://track.analytics.services.gov.ie/tr4ck3rj: 61ms CPU time
Warning::
Third-party scripts: 350ms (52% of total)

Main Thread Breakdown

Other 43% Style & Layout 25% Script Evaluation 14% Parse HTML & CSS 10% Rendering 5%
ScriptTotalScriptingParse/CompileParty
https://www.gov.ie/en/320ms13ms2ms1st
Unattributable289ms16ms0ms3rd
https://track.analytics.services.gov.ie/tr4ck3rj61ms50ms10ms3rd
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
394 KB transferred, 20 requests
PASS
394 KB transferred, 20 requests
Info::
Page weighs 979 KB (394 KB transferred)
Info::
20 HTTP requests
Info::
Estimated 0.08 g CO2 per page load
394 KB / 2.4 MB budget
394 KB transferred
20 requests
0.08 g CO2 per page load
HTML 93.8 KiB 24%
Other 92.3 KiB 23%
Fonts 90.6 KiB 23%
JavaScript 82.3 KiB 21%
CSS 34.7 KiB 9%
Other 286 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
No images on this page
PASS
No images on this page
Info::
No images on this page
0 images 0 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
Font Loading
5 fonts (91 KB)
PASS
5 fonts (91 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

91 KB total

Render-blocking

0

of 5

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 FCP 3.8 s LCP 4.2 shttps://fonts.gstatic.com/s/lato/v25/S6uyw4BMUTPHjx4wXg.woff2S6uyw4BMUTPHjx4wXg.woff2 https://fonts.gstatic.com/s/lato/v25/S6uyw4BMUTPHjx4wXg.woff2 — 23.1 KiB — 69 ms — font-display: swaphttps://fonts.gstatic.com/s/lato/v25/S6u9w4BMUTPHh6UVSwiPGQ.woff2S6u9w4BMUTPHh6UVSwiPGQ.... https://fonts.gstatic.com/s/lato/v25/S6u9w4BMUTPHh6UVSwiPGQ.woff2 — 22.5 KiB — 69 ms — font-display: swaphttps://fonts.gstatic.com/s/lato/v25/S6u9w4BMUTPHh6UVSwiPGQ3q5d0.woff2S6u9w4BMUTPHh6UVSwiPGQ3... https://fonts.gstatic.com/s/lato/v25/S6u9w4BMUTPHh6UVSwiPGQ3q5d0.woff2 — 13.9 KiB — 10 ms — font-display: swaphttps://fonts.gstatic.com/s/lato/v25/S6uyw4BMUTPHjx4wXiWtFCc.woff2S6uyw4BMUTPHjx4wXiWtFCc... https://fonts.gstatic.com/s/lato/v25/S6uyw4BMUTPHjx4wXiWtFCc.woff2 — 13.7 KiB — 12 ms — font-display: swaphttps://fonts.gstatic.com/l/font?kit=kJEPBvYX7BgnkSrUwT8OhrdQw4oELdPIeeII9v6oDMzBwG-RpA6RzaxHMPdY40yxrjGyv3fzdVBO1USv9luNuHretFyMoO5Evtg09_hiw0AVLLPTMa0C1kpk-B1ncDvcTrRI4fJyQ9G0AeeJAAJVCtuTttVwp8r8XGcOys2ympERgj2PAcU2iiC8sL7bGHg9E6GD8lRz3ksdAkH10ldM0-S_&skey=b8dc2088854b122f&v=v331font https://fonts.gstatic.com/l/font?kit=kJEPBvYX7BgnkSrUwT8OhrdQw4oELdPIeeII9v6oDMzBwG-RpA6RzaxHMPdY40yxrjGyv3fzdVBO1USv9luNuHretFyMoO5Evtg09_hiw0AVLLPTMa0C1kpk-B1ncDvcTrRI4fJyQ9G0AeeJAAJVCtuTttVwp8r8XGcOys2ympERgj2PAcU2iiC8sL7bGHg9E6GD8lRz3ksdAkH10ldM0-S_&skey=b8dc2088854b122f&v=v331 — 17.5 KiB — 70 ms — font-display: swap
S6uyw4BMUTPHjx4wXg.woff2 woff2 swap
Size 23 KB
Load time 69 ms
Start 508 ms
Risk FOUT — text flashes from fallback to web font
S6u9w4BMUTPHh6UVSwiPGQ.... woff2 swap
Size 23 KB
Load time 69 ms
Start 508 ms
Risk FOUT — text flashes from fallback to web font
S6u9w4BMUTPHh6UVSwiPGQ3... woff2 swap
Size 14 KB
Load time 10 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
S6uyw4BMUTPHjx4wXiWtFCc... woff2 swap
Size 14 KB
Load time 12 ms
Start 1.2 s
Risk FOUT — text flashes from fallback to web font
font woff2 swap
Size 17 KB
Load time 70 ms
Start 1.2 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
6 scripts, 40 KB unused
PASS
6 scripts, 40 KB unused
Warning::
https://track.analytics.services.gov.ie/tr4ck3rj: 40 KB unused (57%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 40 KB
40 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://track.analytics.services.gov.ie/tr4ck3rj71 KB40 KB (57%)✓3rd
https://assets.gov.ie/static/custom/js/header.6bc624748825.js?v=1.0.03 KB—✓3rd
https://assets.gov.ie/static/custom/js/feedback-form.32bc07c25177.js2 KB—✓3rd
https://assets.gov.ie/static/custom/js/character-counter.512c0914024f.js1 KB—✓3rd
https://assets.gov.ie/static/custom/js/front-theme.58d2faa2fcc9.js5 KB—✓3rd
https://assets.gov.ie/static/custom/js/table-cell-expand.0873193d1f3f.js1 KB—✓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

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
4 hints, 0 missing preconnects
PASS
4 hints, 0 missing preconnects
Info::
Page uses 4 resource hint(s)

Current Resource Hints

preconnect
2
preload
2
dns-prefetch
—
prefetch
—

4 resource hints configured

A
Page Weight Inventory
20 resources · 394 KB · 40 KB savings available
PASS
20 resources · 394 KB · 40 KB savings available
Info::
Within 1MB page-weight target
Got: 394 KB
Warning::
17 third-party resources (76% of weight)
20 resources · 393.9 KiB · 17 third-party Within 1MB page-weight target
Document 24% · 94.7 KiB
Image 23% · 91.4 KiB
Font 23% · 90.6 KiB
JavaScript 21% · 82.3 KiB
CSS 9% · 34.7 KiB
Other 0% · 286 B

~39.6 KiB of savings available

Remove unused JavaScript: 39.6 KiB
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
20 requests over 3385ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 3.8 s LCP 4.2 shttps://www.gov.ie// https://www.gov.ie/ — 302 — 397 B — 343 ms — h2https://www.gov.ie/en//en/ https://www.gov.ie/en/ — 200 — 93.8 KiB — 267 ms — h2https://fonts.gstatic.com/s/lato/v25/S6uyw4BMUTPHjx4wXg.woff2fonts.gstatic.com/s/lato/v25/S6uyw4... https://fonts.gstatic.com/s/lato/v25/S6uyw4BMUTPHjx4wXg.woff2 — 200 — 23.1 KiB — 69 ms — h3https://fonts.gstatic.com/s/lato/v25/S6u9w4BMUTPHh6UVSwiPGQ.woff2fonts.gstatic.com/s/lato/v25/S6u9w4... https://fonts.gstatic.com/s/lato/v25/S6u9w4BMUTPHh6UVSwiPGQ.woff2 — 200 — 22.5 KiB — 69 ms — h3https://fonts.googleapis.com/css2?family=Lato:ital,wght@0,400;0,500;0,600;0,700;0,800;0,900;1,400;1,500&display=optionalfonts.googleapis.com/css2?family=La... https://fonts.googleapis.com/css2?family=Lato:ital,wght@0,400;0,500;0,600;0,700;0,800;0,900;1,400;1,500&display=optional — 200 — 671 B — 123 ms — h2https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@20..48,400,0..1,0&icon_names=accessibility_new,add_circle,apps,arrow_back,arrow_downward,arrow_drop_down,arrow_drop_up,arrow_forward,arrow_left_alt,arrow_outward,arrow_right_alt,arrow_upward,attach_file,block,call,cancel,candlestick_chart,chat_bubble,check,check_circle,chevron_left,chevron_right,child_care,close,content_copy,credit_card,delete,directions_car,do_not_disturb_on,download,edit,error,event,filter_list,first_page,health_and_safety,home,info,keyboard_arrow_down,keyboard_arrow_up,last_page,link,location_on,login,logout,mail,menu,mic,more_horiz,more_vert,open_in_new,person,person_cancel,person_check,refresh,search,send,settings,sort,space_dashboard,swap_vert,sync,thumb_down,thumb_up,unfold_more,upload,visibility,visibility_off,warning,work&display=swapfonts.googleapis.com/css2?family=Ma... https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@20..48,400,0..1,0&icon_names=accessibility_new,add_circle,apps,arrow_back,arrow_downward,arrow_drop_down,arrow_drop_up,arrow_forward,arrow_left_alt,arrow_outward,arrow_right_alt,arrow_upward,attach_file,block,call,cancel,candlestick_chart,chat_bubble,check,check_circle,chevron_left,chevron_right,child_care,close,content_copy,credit_card,delete,directions_car,do_not_disturb_on,download,edit,error,event,filter_list,first_page,health_and_safety,home,info,keyboard_arrow_down,keyboard_arrow_up,last_page,link,location_on,login,logout,mail,menu,mic,more_horiz,more_vert,open_in_new,person,person_cancel,person_check,refresh,search,send,settings,sort,space_dashboard,swap_vert,sync,thumb_down,thumb_up,unfold_more,upload,visibility,visibility_off,warning,work&display=swap — 200 — 1006 B — 118 ms — h2https://assets.gov.ie/static/ds_global/css/styles.45813495190d.css?v=1.18.2assets.gov.ie/static/ds_global/css/... https://assets.gov.ie/static/ds_global/css/styles.45813495190d.css?v=1.18.2 — 200 — 22.4 KiB — 636 ms — h2https://assets.gov.ie/static/custom/css/front-theme.7514c913605f.cssassets.gov.ie/static/custom/css/fro... https://assets.gov.ie/static/custom/css/front-theme.7514c913605f.css — 200 — 10.6 KiB — 551 ms — h2https://assets.gov.ie/static/custom/js/header.6bc624748825.js?v=1.0.0assets.gov.ie/static/custom/js/head... https://assets.gov.ie/static/custom/js/header.6bc624748825.js?v=1.0.0 — 200 — 3.3 KiB — 538 ms — h2https://assets.gov.ie/static/custom/js/feedback-form.32bc07c25177.jsassets.gov.ie/static/custom/js/feed... https://assets.gov.ie/static/custom/js/feedback-form.32bc07c25177.js — 200 — 1.5 KiB — 448 ms — h2https://assets.gov.ie/static/custom/js/character-counter.512c0914024f.jsassets.gov.ie/static/custom/js/char... https://assets.gov.ie/static/custom/js/character-counter.512c0914024f.js — 200 — 951 B — 446 ms — h2https://assets.gov.ie/static/custom/js/front-theme.58d2faa2fcc9.jsassets.gov.ie/static/custom/js/fron... https://assets.gov.ie/static/custom/js/front-theme.58d2faa2fcc9.js — 200 — 4.7 KiB — 430 ms — h2https://assets.gov.ie/static/custom/js/table-cell-expand.0873193d1f3f.jsassets.gov.ie/static/custom/js/tabl... https://assets.gov.ie/static/custom/js/table-cell-expand.0873193d1f3f.js — 200 — 1.3 KiB — 111 ms — h2https://fonts.gstatic.com/s/lato/v25/S6u9w4BMUTPHh6UVSwiPGQ3q5d0.woff2fonts.gstatic.com/s/lato/v25/S6u9w4... https://fonts.gstatic.com/s/lato/v25/S6u9w4BMUTPHh6UVSwiPGQ3q5d0.woff2 — 200 — 13.9 KiB — 10 ms — h3https://fonts.gstatic.com/s/lato/v25/S6uyw4BMUTPHjx4wXiWtFCc.woff2fonts.gstatic.com/s/lato/v25/S6uyw4... https://fonts.gstatic.com/s/lato/v25/S6uyw4BMUTPHjx4wXiWtFCc.woff2 — 200 — 13.7 KiB — 12 ms — h3https://fonts.gstatic.com/l/font?kit=kJEPBvYX7BgnkSrUwT8OhrdQw4oELdPIeeII9v6oDMzBwG-RpA6RzaxHMPdY40yxrjGyv3fzdVBO1USv9luNuHretFyMoO5Evtg09_hiw0AVLLPTMa0C1kpk-B1ncDvcTrRI4fJyQ9G0AeeJAAJVCtuTttVwp8r8XGcOys2ympERgj2PAcU2iiC8sL7bGHg9E6GD8lRz3ksdAkH10ldM0-S_&skey=b8dc2088854b122f&v=v331fonts.gstatic.com/l/font?kit=kJEPBv... https://fonts.gstatic.com/l/font?kit=kJEPBvYX7BgnkSrUwT8OhrdQw4oELdPIeeII9v6oDMzBwG-RpA6RzaxHMPdY40yxrjGyv3fzdVBO1USv9luNuHretFyMoO5Evtg09_hiw0AVLLPTMa0C1kpk-B1ncDvcTrRI4fJyQ9G0AeeJAAJVCtuTttVwp8r8XGcOys2ympERgj2PAcU2iiC8sL7bGHg9E6GD8lRz3ksdAkH10ldM0-S_&skey=b8dc2088854b122f&v=v331 — 200 — 17.5 KiB — 70 ms — h3https://track.analytics.services.gov.ie/tr4ck3rjtrack.analytics.services.gov.ie/tr4... https://track.analytics.services.gov.ie/tr4ck3rj — 200 — 70.6 KiB — 1.4 s — h2https://track.analytics.services.gov.ie/tr4ck3rp?action_name=Government%20of%20Ireland%3A%20Welcome%20to%20gov.ie&idsite=1&rec=1&r=805158&h=22&m=48&s=53&url=https%3A%2F%2Fwww.gov.ie%2Fen%2F&_id=bde5bd07659767b2&_idn=1&m_vid_sig=b683fe20&m_fin=64ca14&send_image=0&_refts=0&pv_id=N0S9iz&pf_net=0&pf_srv=123&pf_tfr=144&pf_dm1=703&uadata=%7B%22formFactors%22%3A%5B%22Desktop%22%5D%2C%22fullVersionList%22%3A%5B%7B%22brand%22%3A%22Not-A.Brand%22%2C%22version%22%3A%2224.0.0.0%22%7D%2C%7B%22brand%22%3A%22Chromium%22%2C%22version%22%3A%22146.0.7680.164%22%7D%5D%2C%22mobile%22%3Atrue%2C%22model%22%3A%22moto%20g%20power%20(2022)%22%2C%22platform%22%3A%22Android%22%2C%22platformVersion%22%3A%2211.0%22%7D&pdf=1&qt=0&realp=0&wma=0&fla=0&java=0&ag=0&cookie=1&res=412x823track.analytics.services.gov.ie/tr4... https://track.analytics.services.gov.ie/tr4ck3rp?action_name=Government%20of%20Ireland%3A%20Welcome%20to%20gov.ie&idsite=1&rec=1&r=805158&h=22&m=48&s=53&url=https%3A%2F%2Fwww.gov.ie%2Fen%2F&_id=bde5bd07659767b2&_idn=1&m_vid_sig=b683fe20&m_fin=64ca14&send_image=0&_refts=0&pv_id=N0S9iz&pf_net=0&pf_srv=123&pf_tfr=144&pf_dm1=703&uadata=%7B%22formFactors%22%3A%5B%22Desktop%22%5D%2C%22fullVersionList%22%3A%5B%7B%22brand%22%3A%22Not-A.Brand%22%2C%22version%22%3A%2224.0.0.0%22%7D%2C%7B%22brand%22%3A%22Chromium%22%2C%22version%22%3A%22146.0.7680.164%22%7D%5D%2C%22mobile%22%3Atrue%2C%22model%22%3A%22moto%20g%20power%20(2022)%22%2C%22platform%22%3A%22Android%22%2C%22platformVersion%22%3A%2211.0%22%7D&pdf=1&qt=0&realp=0&wma=0&fla=0&java=0&ag=0&cookie=1&res=412x823 — 204 — 286 B — 753 ms — h2https://www.gov.ie/favicon.ico/favicon.ico https://www.gov.ie/favicon.ico — 301 — 516 B — 205 ms — h2https://assets.gov.ie/static/images/favicon.209a437e8d3b.icoassets.gov.ie/static/images/favicon... https://assets.gov.ie/static/images/favicon.209a437e8d3b.ico — 200 — 91.4 KiB — 224 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
52% of JavaScript execution is third-party
First-party Third-party 350ms · 71KB · €4/mo
Unattributable
Other
Costly
Execution 289ms
Transfer 0 KB
Monthly Cost €3/mo
track.analytics.services.gov.ie
Other
Optional
Execution 61ms
Transfer 71 KB
Unused 57%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 289ms and costs ~€3/month

52% 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

Unattributable takes 289ms 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

57% of track.analytics.services.gov.ie'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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