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https://geocaching.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
68
GRADE
D
FIX
5
REVIEW
3
PASS
5
INFO
2

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

Mobile Desktop
63
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
95
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.
100
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.

2.13 s

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

3.55 s

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

150 ms

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

0.038

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

2.81 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.

5.84 s

Page Load Progression

954 ms
1.9 s
2.9 s
3.8 s
4.8 s
5.7 s
6.7 s
7.6 s
Checks
15
5 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
6.2 MB transferred, 36 requests
FIX
6.2 MB transferred, 36 requests
Critical::
Page weighs 7.4 MB (6.2 MB transferred)
Warning::
JavaScript is 3.0 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 3.0 MB
Info::
36 HTTP requests
Info::
Estimated 1.3 g CO2 per page load
6.2 MB / 2.4 MB budget
6.2 MB transferred
36 requests
1.3 g CO2 per page load
JavaScript 3.0 MiB 48%
Other 2.9 MiB 46%
Images 286.1 KiB 5%
Fonts 35.0 KiB 1%
Other 8.8 KiB 0%
HTML 7.5 KiB 0%
CSS 7.3 KiB 0%
Other 2.3 KiB 0%
Other 818 B 0%
Other 551 B 0%
0 2.4 MB 4.9 MB
Over 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

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 (6.2 MiB of 6.2 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Bundles
Action
12 scripts, 2.0 MB unused
FIX
12 scripts, 2.0 MB unused
Warning::
https://www.geocaching.com/play/bundles/lohp?v=kHs...: 1.8 MB unused (74%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-GRQE...: 63 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-WH86...: 58 KB unused (36%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-N3K...: 55 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://script.hotjar.com/modules.6a0f3932cb1341a3...: 37 KB unused (66%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 2.0 MB
2072 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.geocaching.com/play/bundles/lohp?v=kHsKCzo5KyezTAmR6roZlrVfiTR7mXqKh1iF5FoOihs12490 KB1838 KB (74%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-GRQE2910DL&cx=c&gtm=4e64h1144 KB63 KB (43%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-WH86DS6J89&cx=c&gtm=4e64h1161 KB58 KB (36%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-N3KS8V2139 KB55 KB (39%)✓3rd
https://script.hotjar.com/modules.6a0f3932cb1341a35c18.js57 KB37 KB (66%)✓3rd
https://www.geocaching.com/play/app/dist/7029.f5556649571538f1018f.js28 KB21 KB (78%)✓3rd
https://static.hotjar.com/c/hotjar-441815.js?sv=76 KB—✓3rd
https://www.geocaching.com/play/app/dist/5609.c446c261e0f64313b59c.js4 KB—✓3rd
https://www.geocaching.com/play/app/dist/9478.843c25fbb9cf900e665a.js16 KB—✓3rd
https://www.geocaching.com/play/app/dist/4254.00132854dc3d5de4d886.js6 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

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

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

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

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

F
Page Weight Inventory
Action
36 resources · 6.2 MB · 2.0 MB savings available
FIX
36 resources · 6.2 MB · 2.0 MB savings available
Warning::
Page weight 5.2 MB over 1MB target
Got: 6.2 MB Expected: ≤ 1 MB
Info::
~2.0 MB of savings available
Warning::
35 third-party resources (100% of weight)
Info::
2 resources over 200KB
36 resources · 6.2 MiB · 35 third-party 5.2 MiB over 1MB target
JavaScript 48% · 3.0 MiB
Media 46% · 2.9 MiB
Image 5% · 287.8 KiB
Font 1% · 35.0 KiB
Other 0% · 10.1 KiB
Document 0% · 8.2 KiB
CSS 0% · 7.3 KiB

~2.0 MiB of savings available

Remove unused JavaScript: 2.0 MiB
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
10 images, 0 KB saveable
REVIEW
10 images, 0 KB saveable
Warning::
https://www.geocaching.com/play/Content/images/loh... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.geocaching.com/play/Content/images/loh... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
10 images 286 KB
0 oversized -0 KB
10 legacy format
2 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

B
JS Execution Cost
844ms total JS execution
REVIEW
844ms total JS execution
Info::
https://www.geocaching.com/play/bundles/lohp?v=kHs...: 176ms CPU time
Info::
Unattributable: 164ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-N3K...: 115ms CPU time
Info::
https://www.googletagmanager.com/gtag/js?id=G-WH86...: 101ms CPU time
Info::
https://www.geocaching.com/play: 86ms CPU time
Warning::
Third-party scripts: 844ms (100% of total)

Main Thread Breakdown

Script Evaluation 51% Other 21% Script Parsing & Compilation 19% Style & Layout 7%
ScriptTotalScriptingParse/CompileParty
https://www.geocaching.com/play/bundles/lohp?v=kHsKCzo5KyezTAmR6roZlrVfiTR7mXqKh1iF5FoOihs1176ms67ms101ms3rd
Unattributable164ms4ms0ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-N3KS8V2115ms94ms16ms3rd
https://www.googletagmanager.com/gtag/js?id=G-WH86DS6J89&cx=c&gtm=4e64h1101ms83ms16ms3rd
https://www.geocaching.com/play86ms2ms1ms3rd
https://www.googletagmanager.com/gtag/js?id=G-GRQE2910DL&cx=c&gtm=4e64h175ms58ms17ms3rd
https://www.geocaching.com/play/app/dist/9478.843c25fbb9cf900e665a.js70ms66ms3ms3rd
https://script.hotjar.com/modules.6a0f3932cb1341a35c18.js56ms47ms8ms3rd
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
1 fonts (35 KB)
PASS
1 fonts (35 KB)
Info::
1 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

1

35 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 1.0 s 2.0 s 3.0 s FCP 2.1 s LCP 3.6 shttps://fonts.gstatic.com/s/notosans/v42/o-0bIpQlx3QUlC5A4PNB6Ryti20_6n1iPHjc5a7du3mhPy0.woff2o-0bIpQlx3QUlC5A4PNB6Ry... https://fonts.gstatic.com/s/notosans/v42/o-0bIpQlx3QUlC5A4PNB6Ryti20_6n1iPHjc5a7du3mhPy0.woff2 — 35.0 KiB — 11 ms — font-display: swap
o-0bIpQlx3QUlC5A4PNB6Ry... woff2 swap
Size 35 KB
Load time 11 ms
Start 1.9 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+
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
Network Waterfall
36 requests over 5413ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s FCP 2.1 s LCP 3.6 shttps://geocaching.com// https://geocaching.com/ — 302 — 332 B — 711 ms — http/1.1https://www.geocaching.com/www.geocaching.com/ https://www.geocaching.com/ — 302 — 336 B — 711 ms — http/1.1https://www.geocaching.com/playwww.geocaching.com/play https://www.geocaching.com/play — 200 — 7.5 KiB — 210 ms — http/1.1https://fonts.googleapis.com/css?family=Noto+Sans:400,700&subset=latin,greek-extfonts.googleapis.com/css?family=Not... https://fonts.googleapis.com/css?family=Noto+Sans:400,700&subset=latin,greek-ext — 200 — 1.2 KiB — 17 ms — h2https://www.geocaching.com/play/app/ui-scss/lohp-layout.csswww.geocaching.com/play/app/ui-scss... https://www.geocaching.com/play/app/ui-scss/lohp-layout.css — 200 — 6.1 KiB — 196 ms — http/1.1https://www.geocaching.com/play/Content/images/lohp/phoneframe.pngwww.geocaching.com/play/Content/ima... https://www.geocaching.com/play/Content/images/lohp/phoneframe.png — 200 — 7.5 KiB — 384 ms — http/1.1https://www.geocaching.com/play/Content/images/lohp/map-screens-small/en-US.jpgwww.geocaching.com/play/Content/ima... https://www.geocaching.com/play/Content/images/lohp/map-screens-small/en-US.jpg — 200 — 24.1 KiB — 715 ms — http/1.1https://www.geocaching.com/play/Content/images/lohp/illustrations/signal.svgwww.geocaching.com/play/Content/ima... https://www.geocaching.com/play/Content/images/lohp/illustrations/signal.svg — 200 — 2.2 KiB — 562 ms — http/1.1https://www.geocaching.com/play/Content/images/lohp/illustrations/phoneandpin.svgwww.geocaching.com/play/Content/ima... https://www.geocaching.com/play/Content/images/lohp/illustrations/phoneandpin.svg — 200 — 2.5 KiB — 686 ms — http/1.1https://www.geocaching.com/play/Content/images/lohp/illustrations/notebookpencil.svgwww.geocaching.com/play/Content/ima... https://www.geocaching.com/play/Content/images/lohp/illustrations/notebookpencil.svg — 200 — 2.3 KiB — 692 ms — http/1.1https://www.geocaching.com/play/bundles/lohp?v=kHsKCzo5KyezTAmR6roZlrVfiTR7mXqKh1iF5FoOihs1www.geocaching.com/play/bundles/loh... https://www.geocaching.com/play/bundles/lohp?v=kHsKCzo5KyezTAmR6roZlrVfiTR7mXqKh1iF5FoOihs1 — 200 — 2.4 MiB — 2.7 s — http/1.1https://www.googletagmanager.com/gtm.js?id=GTM-N3KS8V2www.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-N3KS8V2 — 200 — 139.2 KiB — 25 ms — h2https://www.geocaching.com/play/app/ui-images/components/app-store-list/badge-google-play.pngwww.geocaching.com/play/app/ui-imag... https://www.geocaching.com/play/app/ui-images/components/app-store-list/badge-google-play.png — 200 — 3.7 KiB — 338 ms — http/1.1https://www.geocaching.com/play/app/ui-images/components/app-store-list/badge-apple.svgwww.geocaching.com/play/app/ui-imag... https://www.geocaching.com/play/app/ui-images/components/app-store-list/badge-apple.svg — 200 — 12.3 KiB — 472 ms — http/1.1https://fonts.gstatic.com/s/notosans/v42/o-0bIpQlx3QUlC5A4PNB6Ryti20_6n1iPHjc5a7du3mhPy0.woff2fonts.gstatic.com/s/notosans/v42/o-... https://fonts.gstatic.com/s/notosans/v42/o-0bIpQlx3QUlC5A4PNB6Ryti20_6n1iPHjc5a7du3mhPy0.woff2 — 200 — 35.0 KiB — 11 ms — h3https://d17wd0umvxxjds.cloudfront.net/play/Content/videos/loggedout-cache-finds.webmd17wd0umvxxjds.cloudfront.net/play/... https://d17wd0umvxxjds.cloudfront.net/play/Content/videos/loggedout-cache-finds.webm — 206 — 2.9 MiB — 1.4 s — http/1.1https://www.googletagmanager.com/gtag/js?id=G-GRQE2910DL&cx=c&gtm=4e64h1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-GRQE2910DL&cx=c&gtm=4e64h1 — 200 — 144.2 KiB — 24 ms — h2https://www.googletagmanager.com/gtag/js?id=G-WH86DS6J89&cx=c&gtm=4e64h1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-WH86DS6J89&cx=c&gtm=4e64h1 — 200 — 161.0 KiB — 32 ms — h2https://static.hotjar.com/c/hotjar-441815.js?sv=7static.hotjar.com/c/hotjar-441815.j... https://static.hotjar.com/c/hotjar-441815.js?sv=7 — 200 — 6.3 KiB — 21 ms — h2https://script.hotjar.com/modules.6a0f3932cb1341a35c18.jsscript.hotjar.com/modules.6a0f3932c... https://script.hotjar.com/modules.6a0f3932cb1341a35c18.js — 200 — 56.6 KiB — 22 ms — h2https://www.google-analytics.com/g/collect?v=2&tid=G-GRQE2910DL&gtm=45je64h1v879675107z876298958za20gzb76298958zd76298958&_p=1776813233153&gcd=13l3l3l3l1l1&npa=0&dma=0&are=1&cid=1793398504.1776813233&frm=0&pscdl=noapi&rcb=1&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115616985~115938466~115938468~117266401~117384405&uid=&dp=play&dt=LOHP&sid=1776813233&sct=1&seg=0&dl=https%3A%2F%2Fwww.geocaching.com%2Fplay&_tu=QA&en=page_view&_fv=1&_nsi=1&_ss=1&up.find_count=&up.find_buckets=&up.member_level=&up.hide_count=&up.hide_buckets=&up.is_validated=&up.signup_date=&up.signup_year=&up.hide_count_no_events=&up.events_hosted=&up.first_hide_date=&up.first_event_hosted_date=&tfd=2109www.google-analytics.com/g/collect?... https://www.google-analytics.com/g/collect?v=2&tid=G-GRQE2910DL&gtm=45je64h1v879675107z876298958za20gzb76298958zd76298958&_p=1776813233153&gcd=13l3l3l3l1l1&npa=0&dma=0&are=1&cid=1793398504.1776813233&frm=0&pscdl=noapi&rcb=1&sr=800x600&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=&uamb=0&uap=macOS&uapv=10.15.7&uaw=0&ul=en-us&_s=1&tag_exp=0~115616985~115938466~115938468~117266401~117384405&uid=&dp=play&dt=LOHP&sid=1776813233&sct=1&seg=0&dl=https%3A%2F%2Fwww.geocaching.com%2Fplay&_tu=QA&en=page_view&_fv=1&_nsi=1&_ss=1&up.find_count=&up.find_buckets=&up.member_level=&up.hide_count=&up.hide_buckets=&up.is_validated=&up.signup_date=&up.signup_year=&up.hide_count_no_events=&up.events_hosted=&up.first_hide_date=&up.first_event_hosted_date=&tfd=2109 — 204 — 551 B — 108 ms — h2https://www.google.com/measurement/conversion?random=1776813233487&cv=11&tid=G-WH86DS6J89&fst=1776813233487&fmt=8&en=session_start&gtm=45je64h1v873824595z876298958za20gzb76298958zd76298958xec&gcd=13l3l3l3l1l1&dma=0&tag_exp=0~115616985~115938466~115938469~117266401&u_w=800&u_h=600&url=https%3A%2F%2Fwww.geocaching.com%2Fplay&gacid=1793398504.1776813233&frm=0&tiba=Geocaching&npa=0&pscdl=noapi&auid=1284732779.1776813234&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uamb=0&uam=&uap=macOS&uapv=10.15.7&uaw=0&_tu=QA&rcb=9www.google.com/measurement/conversi... https://www.google.com/measurement/conversion?random=1776813233487&cv=11&tid=G-WH86DS6J89&fst=1776813233487&fmt=8&en=session_start&gtm=45je64h1v873824595z876298958za20gzb76298958zd76298958xec&gcd=13l3l3l3l1l1&dma=0&tag_exp=0~115616985~115938466~115938469~117266401&u_w=800&u_h=600&url=https%3A%2F%2Fwww.geocaching.com%2Fplay&gacid=1793398504.1776813233&frm=0&tiba=Geocaching&npa=0&pscdl=noapi&auid=1284732779.1776813234&uaa=x86&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uamb=0&uam=&uap=macOS&uapv=10.15.7&uaw=0&_tu=QA&rcb=9 — 200 — 19 B — 70 ms — 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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 844ms · 3014KB · $11/mo
www.geocaching.com
Other
Optional
Execution 176ms
Transfer 2490 KB
Unused 74%
Monthly Cost $2/mo
Unattributable
Other
Optional
Execution 164ms
Transfer 0 KB
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 115ms
Transfer 139 KB
Unused 39%
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 101ms
Transfer 161 KB
Unused 36%
Monthly Cost $1/mo
www.geocaching.com
Other
Optional
Execution 86ms
Transfer 8 KB
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 75ms
Transfer 144 KB
Unused 43%
Monthly Cost $1/mo
www.geocaching.com
Other
Optional
Execution 70ms
Transfer 16 KB
Monthly Cost $1/mo
Hotjar
Session Replay
Optional
Execution 56ms
Transfer 57 KB
Unused 66%
Monthly Cost $1/mo

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

74% of www.geocaching.com'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

66% of Hotjar'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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