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

100

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.

390 ms

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

1.50 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.

0.033

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

828 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

1.54 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

14 PASS 4 REVIEW 2 FIX

Page Weight Budget

Action

2.3 MB transferred, 154 requests

FIX

2.3 MB transferred, 154 requests

Page weighs 5.7 MB (2.3 MB transferred)

Images are 1.3 MB — compress or use modern formats

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

Got: 1.3 MB

JavaScript is 680 KB — consider code splitting or lazy loading

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

Got: 680 KB

Fonts are 248 KB — consider subsetting or using system fonts

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

Got: 248 KB

154 HTTP requests — consider bundling or reducing

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

Estimated 0.49 g CO2 per page load

2.3 MB transferred

154 requests

0.49 g CO2 per page load

Images 1.3 MiB 57%

JavaScript 680.4 KiB 28%

Fonts 247.7 KiB 10%

HTML 103.9 KiB 4%

CSS 6.1 KiB 0%

Other 2.8 KiB 0%

0 2.4 MB 4.9 MB

Approaching limit

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

Page Weight Inventory

Action

154 resources · 2.3 MB · 0 KB savings available

FIX

154 resources · 2.3 MB · 0 KB savings available

Page weight 2.3 MB exceeds 1 MB target by 1.3 MB

Got: 2.3 MB Expected: ≤ 1 MB

112 third-party resources (46% of weight)

2 resources over 200KB

154 resources · 2.3 MiB · 112 third-party 1.3 MiB over 1MB target

Image 57% · 1.3 MiB

JavaScript 28% · 680.4 KiB

Font 10% · 247.7 KiB

Document 4% · 103.9 KiB

CSS 0% · 6.1 KiB

Other 0% · 1.2 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

154 resources			2.3 MiB

Third-Party Impact

46% third-party, 0 ms blocking

REVIEW

46% third-party, 0 ms blocking

Third-party code accounts for 46% of page weight (1.1 MiB of 2.3 MiB)

Third-party blocking time is low (0 ms)

54%

46%

First-party Third-party

Image Optimization

114 images, 0 KB saveable

REVIEW

114 images, 0 KB saveable

All images are well-optimized

114 images 1.3 MB

0 oversized -0 KB

99 legacy format

0 missing dimensions CLS risk

JS Execution Cost

812ms total JS execution

REVIEW

812ms total JS execution

https://www.essethelabel.com/: 413ms CPU time

Unattributable: 399ms CPU time

Main Thread Breakdown

Other 51% Style & Layout 32% Parse HTML & CSS 8% Script Evaluation 6%

Script	Total	Scripting	Parse/Compile	Party
https://www.essethelabel.com/	413ms	40ms	1ms	1st
Unattributable	399ms	5ms	0ms	1st

HTTP Caching

private, max-age=0, must-revalidate

REVIEW

private, max-age=0, must-revalidate

Cache-Control header is set

Got: private, max-age=0, must-revalidate

ETag present — enables conditional (304) responses

Cache-Control

private, max-age=0, must-revalidate

Directive	Value	Meaning
private	—	Only browser cache, not CDN/proxy
max-age	0	Cache for 0 seconds
must-revalidate	—	Must recheck with server after expiry

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

Font Loading

5 fonts (248 KB)

PASS

5 fonts (248 KB)

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

Web fonts

248 KB total

Render-blocking

of 5

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

roboto_n4.2019d890f07b1... woff2 swap

Size 30 KB

Load time 50 ms

Start 194 ms