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Performance

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

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

Mobile Desktop
73
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.

1.81 s

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

1.81 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.

0.200

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

1.94 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.

1.81 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 1 REVIEW 2 FIX
D
Third-Party Impact
Action
78% third-party, 0 ms blocking
FIX
78% third-party, 0 ms blocking
Warning::
Third-party code accounts for 78% of page weight (332.3 KiB of 427.0 KiB)
Info::
Third-party blocking time is low (0 ms)
22%
78%
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.

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

Green Hosting

No green hosting detected

A+
Page Weight Budget
427 KB transferred, 23 requests
PASS
427 KB transferred, 23 requests
Info::
Page weighs 1011 KB (427 KB transferred)
Info::
23 HTTP requests
Info::
Estimated 0.09 g CO2 per page load
427 KB / 2.4 MB budget
427 KB transferred
23 requests
0.09 g CO2 per page load
HTML 93.8 KiB 22%
Other 92.3 KiB 22%
Fonts 90.6 KiB 21%
JavaScript 82.3 KiB 19%
CSS 34.6 KiB 8%
Images 33.1 KiB 8%
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
3 images, 0 KB saveable
PASS
3 images, 0 KB saveable
Info::
All images are well-optimized
3 images 33 KB
0 oversized -0 KB
3 legacy format
0 missing dimensions CLS risk
A+
JS Execution Cost
145ms total JS execution
PASS
145ms total JS execution
Info::
https://www.gov.ie/en/: 85ms CPU time
Info::
Unattributable: 60ms CPU time
Info::
Third-party scripts: 60ms (41% of total)

Main Thread Breakdown

Other 40% Style & Layout 27% Script Evaluation 14% Parse HTML & CSS 10% Rendering 6%
ScriptTotalScriptingParse/CompileParty
https://www.gov.ie/en/85ms4ms0ms1st
Unattributable60ms4ms0ms3rd
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 500 ms 1.0 s 1.5 s FCP 1.8 s LCP 1.8 shttps://fonts.gstatic.com/s/lato/v25/S6uyw4BMUTPHjx4wXg.woff2S6uyw4BMUTPHjx4wXg.woff2 https://fonts.gstatic.com/s/lato/v25/S6uyw4BMUTPHjx4wXg.woff2 — 23.1 KiB — 65 ms — font-display: swaphttps://fonts.gstatic.com/s/lato/v25/S6u9w4BMUTPHh6UVSwiPGQ.woff2S6u9w4BMUTPHh6UVSwiPGQ.... https://fonts.gstatic.com/s/lato/v25/S6u9w4BMUTPHh6UVSwiPGQ.woff2 — 22.5 KiB — 65 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 — 11 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 — 13 ms — font-display: swap
S6uyw4BMUTPHjx4wXg.woff2 woff2 swap
Size 23 KB
Load time 65 ms
Start 858 ms
Risk FOUT — text flashes from fallback to web font
S6u9w4BMUTPHh6UVSwiPGQ.... woff2 swap
Size 23 KB
Load time 65 ms
Start 859 ms
Risk FOUT — text flashes from fallback to web font
S6u9w4BMUTPHh6UVSwiPGQ3... woff2 swap
Size 14 KB
Load time 10 ms
Start 1.7 s
Risk FOUT — text flashes from fallback to web font
S6uyw4BMUTPHjx4wXiWtFCc... woff2 swap
Size 14 KB
Load time 11 ms
Start 1.7 s
Risk FOUT — text flashes from fallback to web font
font woff2 swap
Size 17 KB
Load time 13 ms
Start 1.7 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
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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A
Page Weight Inventory
23 resources · 427 KB · 40 KB savings available
PASS
23 resources · 427 KB · 40 KB savings available
Info::
Within 1MB page-weight target
Got: 427 KB
Warning::
20 third-party resources (78% of weight)
23 resources · 427.0 KiB · 20 third-party Within 1MB page-weight target
Image 29% · 124.5 KiB
Document 22% · 94.7 KiB
Font 21% · 90.6 KiB
JavaScript 19% · 82.3 KiB
CSS 8% · 34.6 KiB
Other 0% · 286 B

~39.6 KiB of savings available

Remove unused JavaScript: 39.6 KiB
Network Waterfall
23 requests over 3418ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 1.8 s LCP 1.8 shttps://www.gov.ie// https://www.gov.ie/ — 302 — 397 B — 708 ms — h2https://www.gov.ie/en//en/ https://www.gov.ie/en/ — 200 — 93.8 KiB — 271 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 — 65 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 — 65 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 — 956 B — 115 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 — 612 B — 219 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 — 813 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 — 718 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 — 3.4 KiB — 619 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 — 620 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 — 957 B — 601 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 — 707 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 — 1.2 KiB — 111 ms — h2https://assets.gov.ie/static/images/2d3400fd-9ea5-4312-9c.2e16d0ba.fill-300x200.format-webp.webpassets.gov.ie/static/images/2d3400f... https://assets.gov.ie/static/images/2d3400fd-9ea5-4312-9c.2e16d0ba.fill-300x200.format-webp.webp — 200 — 4.8 KiB — 362 ms — h2https://assets.gov.ie/static/images/7a38a504e2d5-Shangana.2e16d0ba.fill-300x200.format-webp.webpassets.gov.ie/static/images/7a38a50... https://assets.gov.ie/static/images/7a38a504e2d5-Shangana.2e16d0ba.fill-300x200.format-webp.webp — 200 — 22.7 KiB — 153 ms — h2https://assets.gov.ie/static/images/48383027-85f8-44f8-a6.2e16d0ba.fill-300x200.format-webp.webpassets.gov.ie/static/images/4838302... https://assets.gov.ie/static/images/48383027-85f8-44f8-a6.2e16d0ba.fill-300x200.format-webp.webp — 200 — 5.6 KiB — 372 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 — 11 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 — 13 ms — h3https://track.analytics.services.gov.ie/tr4ck3rjtrack.analytics.services.gov.ie/tr4... https://track.analytics.services.gov.ie/tr4ck3rj — 200 — 70.6 KiB — 1.3 s — h2https://track.analytics.services.gov.ie/tr4ck3rp?action_name=Government%20of%20Ireland%3A%20Welcome%20to%20gov.ie&idsite=1&rec=1&r=183136&h=22&m=49&s=10&url=https%3A%2F%2Fwww.gov.ie%2Fen%2F&_id=c5ec08d2f53f2a41&_idn=1&m_vid_sig=31403fb6&m_fin=ccfd9a&send_image=0&_refts=0&pv_id=OvoJEt&pf_net=0&pf_srv=125&pf_tfr=146&pf_dm1=887&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%3Afalse%2C%22model%22%3A%22%22%2C%22platform%22%3A%22macOS%22%2C%22platformVersion%22%3A%2210.15.7%22%7D&pdf=1&qt=0&realp=0&wma=0&fla=0&java=0&ag=0&cookie=1&res=800x600track.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=183136&h=22&m=49&s=10&url=https%3A%2F%2Fwww.gov.ie%2Fen%2F&_id=c5ec08d2f53f2a41&_idn=1&m_vid_sig=31403fb6&m_fin=ccfd9a&send_image=0&_refts=0&pv_id=OvoJEt&pf_net=0&pf_srv=125&pf_tfr=146&pf_dm1=887&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%3Afalse%2C%22model%22%3A%22%22%2C%22platform%22%3A%22macOS%22%2C%22platformVersion%22%3A%2210.15.7%22%7D&pdf=1&qt=0&realp=0&wma=0&fla=0&java=0&ag=0&cookie=1&res=800x600 — 204 — 286 B — 205 ms — h2https://www.gov.ie/favicon.ico/favicon.ico https://www.gov.ie/favicon.ico — 301 — 522 B — 138 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 — 192 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
41% of JavaScript execution is third-party
First-party Third-party 60ms · 0KB · €1/mo
Unattributable
Other
Optional
Execution 60ms
Transfer 0 KB
Monthly Cost €1/mo

41% 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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