Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

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

Mobile Desktop

Performance

Accessibility

Best Practices

SEO

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

3.03 s

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

10.60 s

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

940 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.

3.77 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.

11.98 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

10 PASS 2 REVIEW 3 FIX

Third-Party Impact

Action

100% third-party, 0 ms blocking

FIX

100% third-party, 0 ms blocking

Third-party code accounts for 100% of page weight (914.3 KiB of 916.0 KiB)

Third-party blocking time is low (0 ms)

100%

First-party Third-party

JS Execution Cost

Action

4654ms total JS execution

FIX

4654ms total JS execution

https://www.google.fr/maps: 1340ms CPU time

/maps/_/js/k=maps.lite.en.ZZHowdlwmgQ.2021.O/m=boo...: 1168ms CPU time

Unattributable: 1013ms CPU time

https://www.google.com/js/bg/Zd2qDcyUX2wIvPkBdt0eA...: 452ms CPU time

https://www.google.fr/maps/_/js/k=maps.lite.en.ZZH...: 268ms CPU time

Third-party scripts: 4654ms (100% of total)

Main Thread Breakdown

Script Evaluation 52% Other 26% Style & Layout 9% Script Parsing & Compilation 8%

Script	Total	Scripting	Parse/Compile	Party
https://www.google.fr/maps	1340ms	585ms	216ms	3rd
/maps/_/js/k=maps.lite.en.ZZHowdlwmgQ.2021.O/m=bootstrap,app/am=EAAAEEI/rt=j/d=0/rs=ACT90oGALuaqtwSKtF1PwaF1CNf2ZpZyYA	1168ms	941ms	0ms	3rd
Unattributable	1013ms	42ms	0ms	3rd
https://www.google.com/js/bg/Zd2qDcyUX2wIvPkBdt0eA2aanqqmvid5ojTkZH9iEf0.js	452ms	441ms	8ms	3rd
https://www.google.fr/maps/_/js/k=maps.lite.en.ZZHowdlwmgQ.2021.O/ck=maps.lite.IxSOGCKvb2k.L.W.O/m=map_raster/am=EAAAEEI/rt=j/d=0/rs=ACT90oGfF83IHx3ooKwcMZStIAUyMBV_Fw	268ms	126ms	13ms	3rd
https://www.google.fr/maps/_/js/k=maps.lite.en.ZZHowdlwmgQ.2021.O/ck=maps.lite.IxSOGCKvb2k.L.W.O/m=common/am=EAAAEEI/rt=j/d=0/rs=ACT90oGfF83IHx3ooKwcMZStIAUyMBV_Fw	215ms	111ms	102ms	3rd
https://www.google.fr/maps/_/js/k=maps.lite.en.ZZHowdlwmgQ.2021.O/ck=maps.lite.IxSOGCKvb2k.L.W.O/m=bg/am=EAAAEEI/rt=j/d=0/rs=ACT90oGfF83IHx3ooKwcMZStIAUyMBV_Fw	105ms	97ms	3ms	3rd
https://www.google.fr/maps/_/js/k=maps.lite.en.ZZHowdlwmgQ.2021.O/ck=maps.lite.IxSOGCKvb2k.L.W.O/m=promo/am=EAAAEEI/rt=j/d=0/rs=ACT90oGfF83IHx3ooKwcMZStIAUyMBV_Fw	93ms	58ms	10ms	3rd

HTTP Caching

Action

No cache headers

FIX

No cache headers

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.

Image Optimization

68 images, 0 KB saveable

REVIEW

68 images, 0 KB saveable

https://www.google.com/images/branding/lockups/2x/... is missing width/height — may cause layout shift

Set explicit width and height to prevent CLS.

68 images 49 KB

0 oversized -0 KB

42 legacy format

1 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

JS Bundles

13 scripts, 100 KB unused

REVIEW

13 scripts, 100 KB unused

https://www.google.fr/maps/_/js/k=maps.lite.en.ZZH...: 65 KB unused (38%)

Consider code splitting or tree shaking to reduce unused code.

https://www.google.fr/maps/_/js/k=maps.lite.en.ZZH...: 35 KB unused (71%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 100 KB

100 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://www.google.fr/maps/_/js/k=maps.lite.en.ZZHowdlwmgQ.2021.O/ck=maps.lite.IxSOGCKvb2k.L.W.O/m=common/am=EAAAEEI/rt=j/d=0/rs=ACT90oGfF83IHx3ooKwcMZStIAUyMBV_Fw	170 KB	65 KB (38%)	✓	3rd
https://www.google.fr/maps/_/js/k=maps.lite.en.ZZHowdlwmgQ.2021.O/ck=maps.lite.IxSOGCKvb2k.L.W.O/m=searchbox/am=EAAAEEI/rt=j/d=0/rs=ACT90oGfF83IHx3ooKwcMZStIAUyMBV_Fw	50 KB	35 KB (71%)	✓	3rd
https://www.google.fr/maps/_/js/k=maps.lite.en.ZZHowdlwmgQ.2021.O/ck=maps.lite.IxSOGCKvb2k.L.W.O/m=categorical/am=EAAAEEI/rt=j/d=0/rs=ACT90oGfF83IHx3ooKwcMZStIAUyMBV_Fw	0 KB	—	✓	3rd
https://www.google.fr/maps/_/js/k=maps.lite.en.ZZHowdlwmgQ.2021.O/ck=maps.lite.IxSOGCKvb2k.L.W.O/m=bg/am=EAAAEEI/rt=j/d=0/rs=ACT90oGfF83IHx3ooKwcMZStIAUyMBV_Fw	8 KB	—	✓	3rd
https://www.google.fr/maps/_/js/k=maps.lite.en.ZZHowdlwmgQ.2021.O/ck=maps.lite.IxSOGCKvb2k.L.W.O/m=promo/am=EAAAEEI/rt=j/d=0/rs=ACT90oGfF83IHx3ooKwcMZStIAUyMBV_Fw	27 KB	—	✓	3rd
https://www.google.fr/maps/_/js/k=maps.lite.en.ZZHowdlwmgQ.2021.O/ck=maps.lite.IxSOGCKvb2k.L.W.O/m=cohort_logging/am=EAAAEEI/rt=j/d=0/rs=ACT90oGfF83IHx3ooKwcMZStIAUyMBV_Fw	0 KB	—	✓	3rd
https://www.google.fr/maps/_/js/k=maps.lite.en.ZZHowdlwmgQ.2021.O/ck=maps.lite.IxSOGCKvb2k.L.W.O/m=map_raster/am=EAAAEEI/rt=j/d=0/rs=ACT90oGfF83IHx3ooKwcMZStIAUyMBV_Fw	40 KB	—	✓	3rd
https://www.google.fr/maps/_/js/k=maps.lite.en.ZZHowdlwmgQ.2021.O/ck=maps.lite.IxSOGCKvb2k.L.W.O/m=passive/am=EAAAEEI/rt=j/d=0/rs=ACT90oGfF83IHx3ooKwcMZStIAUyMBV_Fw	1 KB	—	✓	3rd
https://www.google.com/js/bg/Zd2qDcyUX2wIvPkBdt0eA2aanqqmvid5ojTkZH9iEf0.js	23 KB	—	✓	3rd
https://www.google.fr/maps/_/js/k=maps.lite.en.ZZHowdlwmgQ.2021.O/ck=maps.lite.IxSOGCKvb2k.L.W.O/m=net/am=EAAAEEI/rt=j/d=0/rs=ACT90oGfF83IHx3ooKwcMZStIAUyMBV_Fw	4 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

Page Weight Budget

916 KB transferred, 193 requests

PASS

916 KB transferred, 193 requests

Page weighs 2.5 MB (916 KB transferred)

193 HTTP requests — consider bundling or reducing

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Estimated 0.19 g CO2 per page load

916 KB transferred

193 requests

0.19 g CO2 per page load

JavaScript 351.6 KiB 38%

HTML 245.3 KiB 27%

Other 231.6 KiB 25%

Images 49.2 KiB 5%

Fonts 31.6 KiB 3%

Other 3.8 KiB 0%

Other 1.7 KiB 0%

Other 1.2 KiB 0%

0 2.4 MB 4.9 MB

Under budget

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

Font Loading

3 fonts (32 KB)

PASS

3 fonts (32 KB)

3 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

32 KB total

Render-blocking

of 3

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

KFOmCnqEu92Fr1Mu4mxKKTU... woff2 swap

Size 11 KB

Load time 30 ms

Start 491 ms

Risk FOUT — text flashes from fallback to web font

KFOlCnqEu92Fr1MmEU9fBBc... woff2 swap

Size 11 KB

Load time 8 ms

Start 530 ms

Risk FOUT — text flashes from fallback to web font

KFOlCnqEu92Fr1MmWUlfBBc... woff2 swap

Size 11 KB

Load time 41 ms

Start 530 ms

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

No caching issues found

All static resources have appropriate caching headers.

A+

Critical Rendering Path

No render-blocking resources

PASS

No render-blocking resources

No render-blocking resources detected

A+

Resource Hints

7 hints, 0 missing preconnects

PASS

7 hints, 0 missing preconnects

Page uses 7 resource hint(s)

Current Resource Hints

preconnect

preload

dns-prefetch

prefetch

—

7 resource hints configured

Page Weight Inventory

193 resources · 916 KB · 100 KB savings available

PASS

193 resources · 916 KB · 100 KB savings available

Within 1MB page-weight target

Got: 916 KB

~100 KB of savings available

191 third-party resources (100% of weight)

1 resources over 200KB

193 resources · 916.0 KiB · 191 third-party Within 1MB page-weight target

JavaScript 38% · 351.6 KiB

Image 31% · 280.0 KiB

Document 27% · 247.0 KiB

Font 3% · 31.6 KiB

Other 1% · 5.7 KiB

~99.9 KiB of savings available

Remove unused JavaScript: 99.9 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

193 resources			916.0 KiB

A+

Render-Blocking Resources

No render-blocking resources detected

PASS

No render-blocking resources detected

No render-blocking resources detected in <head>

A+

Third-Party Resources

No third-party resources detected

PASS

No third-party resources detected

A+

Green Hosting

Whether the site is served from green-energy infrastructure

PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Google Cloud

Network Waterfall

193 requests over 10726ms

INFO

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 4654ms · 514KB · €51/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
www.google.fr www.google.fr	Other	1340ms	245 KB	—	€15/mo	Costly
/maps/_/js/k=maps.lite.en.ZZHowdlwmgQ.2021.O/m=bootstrap,app/am=EAAAEEI/rt=j/d=0/rs=ACT90oGALuaqtwSKtF1PwaF1CNf2ZpZyYA /maps/_/js/k=maps.lite.en.ZZHowdlwmgQ.2021.O/m=bootstrap,app/am=EAAAEEI/rt=j/d=0/rs=ACT90oGALuaqtwSKtF1PwaF1CNf2ZpZyYA	Other	1168ms	0 KB	—	€13/mo	Costly
Unattributable Unattributable	Other	1013ms	0 KB	—	€11/mo	Costly
www.google.com www.google.com	Other	452ms	23 KB	—	€5/mo	Costly
www.google.fr www.google.fr	Other	268ms	40 KB	—	€3/mo	Costly
www.google.fr www.google.fr	Other	215ms	170 KB	38%	€2/mo	Costly
www.google.fr www.google.fr	Other	105ms	8 KB	—	€1/mo	Optional
www.google.fr www.google.fr	Other	93ms	27 KB	—	€1/mo	Optional

www.google.fr

Other

Costly

Execution 1340ms

Transfer 245 KB

Monthly Cost €15/mo

/maps/_/js/k=maps.lite.en.ZZHowdlwmgQ.2021.O/m=bootstrap,app/am=EAAAEEI/rt=j/d=0/rs=ACT90oGALuaqtwSKtF1PwaF1CNf2ZpZyYA

Other

Costly

Execution 1168ms

Transfer 0 KB

Monthly Cost €13/mo

Unattributable

Other

Costly

Execution 1013ms

Transfer 0 KB

Monthly Cost €11/mo

www.google.com

Other

Costly

Execution 452ms

Transfer 23 KB

Monthly Cost €5/mo

www.google.fr

Other

Costly

Execution 268ms

Transfer 40 KB

Monthly Cost €3/mo

www.google.fr

Other

Costly

Execution 215ms

Transfer 170 KB

Unused 38%

Monthly Cost €2/mo

www.google.fr

Other

Optional

Execution 105ms

Transfer 8 KB

Monthly Cost €1/mo

www.google.fr

Other

Optional

Execution 93ms

Transfer 27 KB

Monthly Cost €1/mo

These scripts may cost more than they're worth

www.google.fr adds 1340ms and costs ~€15/month
/maps/_/js/k=maps.lite.en.ZZHowdlwmgQ.2021.O/m=bootstrap,app/am=EAAAEEI/rt=j/d=0/rs=ACT90oGALuaqtwSKtF1PwaF1CNf2ZpZyYA adds 1168ms and costs ~€13/month
Unattributable adds 1013ms and costs ~€11/month
www.google.com adds 452ms and costs ~€5/month
www.google.fr adds 268ms and costs ~€3/month
www.google.fr adds 215ms and costs ~€2/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.google.fr takes 1340ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters