Performance

· 23 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.

1.05 s

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

1.55 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.

0.051

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

2.96 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.

1.55 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

12 PASS 6 REVIEW 1 FIX

Page Weight Budget

Action

10.5 MB transferred, 175 requests

FIX

10.5 MB transferred, 175 requests

Page weighs 18.6 MB (10.5 MB transferred)

Images are 8.6 MB — compress or use modern formats

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Got: 8.6 MB

JavaScript is 1.1 MB — consider code splitting or lazy loading

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Got: 1.1 MB

Fonts are 447 KB — consider subsetting or using system fonts

Subset fonts to include only used characters, or switch to system font stacks.

Got: 447 KB

175 HTTP requests — consider bundling or reducing

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

Estimated 2.2 g CO2 per page load

10.5 MB transferred

175 requests

2.2 g CO2 per page load

Images 8.6 MiB 82%

JavaScript 1.1 MiB 10%

Fonts 446.6 KiB 4%

CSS 192.3 KiB 2%

HTML 156.6 KiB 1%

Other 53.2 KiB 0%

Other 3.2 KiB 0%

Other 1.7 KiB 0%

Other 147 B 0%

Other 0 B 0%

0 2.4 MB 4.9 MB

Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

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

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

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

Image Optimization

24 images, 0 KB saveable

REVIEW

24 images, 0 KB saveable

All images are well-optimized

24 images 8.6 MB

0 oversized -0 KB

22 legacy format

0 missing dimensions CLS risk

JS Execution Cost

611ms total JS execution

REVIEW

611ms total JS execution

https://melenchon2027.fr/: 197ms CPU time

Unattributable: 189ms CPU time

https://melenchon2027.fr/wp-includes/js/jquery/jqu...: 172ms CPU time

https://melenchon2027.fr/cdn-cgi/challenge-platfor...: 53ms CPU time

Third-party scripts: 189ms (31% of total)

Main Thread Breakdown

Script Evaluation 41% Other 28% Style & Layout 20% Parse HTML & CSS 4% Rendering 4%

Script	Total	Scripting	Parse/Compile	Party
https://melenchon2027.fr/	197ms	10ms	1ms	1st
Unattributable	189ms	9ms	0ms	3rd
https://melenchon2027.fr/wp-includes/js/jquery/jquery.min.js?ver=3.7.1	172ms	148ms	2ms	1st
https://melenchon2027.fr/cdn-cgi/challenge-platform/scripts/jsd/main.js	53ms	50ms	0ms	1st

Compression Algorithm

Action

Main response served uncompressed

REVIEW

Main response served uncompressed

Main HTML response has no Content-Encoding (uncompressed)

The main HTML document is served without compression. The Text Compression section above lists the broader picture; for the main response specifically, even gzip would shave ~70-80% off most text payloads.

Server-Timing Observability

No Server-Timing header found

REVIEW

No Server-Timing header found

Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.

Page Weight Inventory

Action

175 resources · 10.5 MB · 25 KB savings available

REVIEW

175 resources · 10.5 MB · 25 KB savings available

Page weight 10.5 MB exceeds 1 MB target by 9.5 MB

Got: 10.5 MB Expected: ≤ 1 MB

61 third-party resources (11% of weight)

15 resources over 200KB

175 resources · 10.5 MiB · 61 third-party 9.5 MiB over 1MB target

Image 82% · 8.6 MiB

JavaScript 10% · 1.1 MiB

Font 4% · 446.6 KiB

CSS 2% · 243.7 KiB

Document 1% · 156.7 KiB

Other 0% · 3.2 KiB

~25.4 KiB of savings available

Remove unused JavaScript: 25.4 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

175 resources			10.5 MiB

HTTP Caching

no-cache

REVIEW

no-cache

Cache-Control header is set

Got: no-cache

No ETag or Last-Modified header

Conditional requests (304 Not Modified) are not possible without validators.

Cache-Control

no-cache

Directive	Value	Meaning
no-cache	—	Cache but always revalidate first

A+

Third-Party Impact

11% third-party, 0 ms blocking

PASS

11% third-party, 0 ms blocking

Third-party code accounts for 11% of page weight (1.2 MiB of 10.5 MiB)

Third-party blocking time is low (0 ms)

89%

First-party Third-party

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

Font Loading

8 fonts (447 KB)

PASS

8 fonts (447 KB)

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

Web fonts

447 KB total

Render-blocking

of 8

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

StackSansText-Bold.ttf ttf swap

Size 77 KB

Load time 33 ms

Start 281 ms