Performance

· 15 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.

613 ms

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

1.23 s

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

32 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.

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.

1.48 s

Page Load Progression

475 ms

950 ms

1.4 s

1.9 s

2.4 s

2.8 s

3.3 s

3.8 s

Checks

7 PASS 3 REVIEW 3 FIX

Page Weight Budget

Action

24.5 MB transferred, 115 requests

FIX

24.5 MB transferred, 115 requests

Page weighs 25.4 MB (24.5 MB transferred)

Images are 23.9 MB — compress or use modern formats

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

Got: 23.9 MB

Fonts are 226 KB — consider subsetting or using system fonts

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

Got: 226 KB

115 HTTP requests — consider bundling or reducing

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

Estimated 5.1 g CO2 per page load

24.5 MB transferred

115 requests

5.1 g CO2 per page load

Images 23.9 MiB 98%

JavaScript 294.4 KiB 1%

Fonts 226.1 KiB 1%

HTML 39.4 KiB 0%

CSS 20.0 KiB 0%

Other 2.3 KiB 0%

Other 683 B 0%

Other 465 B 0%

Other 242 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

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

Third-Party Impact

Action

98% third-party, 0 ms blocking

FIX

98% third-party, 0 ms blocking

Third-party code accounts for 98% of page weight (24.1 MiB of 24.5 MiB)

Third-party blocking time is low (0 ms)

98%

First-party Third-party

Page Weight Inventory

Action

115 resources · 24.5 MB · 109 KB savings available

FIX

115 resources · 24.5 MB · 109 KB savings available

Page weight 23.5 MB over 1MB target

Got: 24.5 MB Expected: ≤ 1 MB

~109 KB of savings available

102 third-party resources (98% of weight)

44 resources over 200KB

115 resources · 24.5 MiB · 102 third-party 23.5 MiB over 1MB target

Image 98% · 23.9 MiB

JavaScript 1% · 294.4 KiB

Font 1% · 226.1 KiB

Document 0% · 39.4 KiB

CSS 0% · 20.0 KiB

Other 0% · 1.4 KiB

~108.9 KiB of savings available

Remove unused JavaScript: 108.9 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

115 resources			24.5 MiB

Image Optimization

86 images, 0 KB saveable

REVIEW

86 images, 0 KB saveable

All images are well-optimized

86 images 23.9 MB

0 oversized -0 KB

83 legacy format

0 missing dimensions CLS risk

JS Execution Cost

939ms total JS execution

REVIEW

939ms total JS execution

Unattributable: 419ms CPU time

https://www.googletagmanager.com/gtag/js?id=G-EFZJ...: 178ms CPU time

https://tenor.com/assets/dist/main.min.js?release=...: 142ms CPU time

https://tenor.com/: 141ms CPU time

https://tenor.com/assets/dist/671.95cc9e.chunk.min...: 59ms CPU time

Third-party scripts: 597ms (64% of total)

Main Thread Breakdown

Other 40% Script Evaluation 39% Style & Layout 6% Garbage Collection 6% Script Parsing & Compilation 3% Rendering 3%

Script	Total	Scripting	Parse/Compile	Party
Unattributable	419ms	11ms	0ms	3rd
https://www.googletagmanager.com/gtag/js?id=G-EFZJPJ84N1	178ms	159ms	17ms	3rd
https://tenor.com/assets/dist/main.min.js?release=r260416-1-master-6dd4	142ms	117ms	12ms	1st
https://tenor.com/	141ms	11ms	1ms	1st
https://tenor.com/assets/dist/671.95cc9e.chunk.min.js	59ms	53ms	0ms	1st

JS Bundles

6 scripts, 109 KB unused

REVIEW

6 scripts, 109 KB unused

https://www.googletagmanager.com/gtag/js?id=G-EFZJ...: 61 KB unused (38%)

Consider code splitting or tree shaking to reduce unused code.

https://tenor.com/assets/dist/main.min.js?release=...: 48 KB unused (44%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 109 KB

109 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://www.googletagmanager.com/gtag/js?id=G-EFZJPJ84N1	161 KB	61 KB (38%)	✓	3rd
https://tenor.com/assets/dist/main.min.js?release=r260416-1-master-6dd4	109 KB	48 KB (44%)	✓	1st
https://tenor.com/assets/dist/770.572410.chunk.min.js	0 KB	—	✓	1st
https://www.google-analytics.com/analytics.js	21 KB	—	✓	3rd
https://tenor.com/assets/dist/671.95cc9e.chunk.min.js	2 KB	—	✓	1st
https://www.google-analytics.com/plugins/ua/linkid.js	1 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

A+

Text Compression

All text resources are compressed

PASS

All text resources are compressed

All text resources are properly compressed.

A+

Font Loading

2 fonts (226 KB)

PASS

2 fonts (226 KB)

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

Web fonts

226 KB total

Render-blocking

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

Inter-roman.var.woff2 woff2 swap

Size 220 KB

Load time 39 ms

Start 280 ms

Risk FOUT — text flashes from fallback to web font

Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need

iconfont.woff woff swap

Size 7 KB

Load time 17 ms

Start 280 ms

Risk FOUT — text flashes from fallback to web font

Convert to woff2 for ~30% smaller file size

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)

Fixing the unchecked items could save ~112 KB and ~224 ms

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

No optimization needed

PASS

No optimization needed

No resource hint issues

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

A+

HTTP Caching

max-age=300 (5 minutes)

PASS

max-age=300 (5 minutes)

Cache-Control header is set

Got: public,max-age=300,stale-while-revalidate=300

Effective TTL: 5 minutes (max-age=300)

ETag present — enables conditional (304) responses

Cache-Control

public,max-age=300,stale-while-revalidate=300

Directive	Value	Meaning
public	—	Any cache may store this response
max-age	300	Cache for 5 minutes
stale-while-revalidate	300	Serve stale for 5 minutes while fetching fresh

Effective TTL: 300 seconds

Network Waterfall

115 requests over 1510ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

Per-script blocking time, transfer cost, and cache headers

INFO

64% of JavaScript execution is third-party

First-party Third-party 597ms · 161KB · €2/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
Unattributable Unattributable	Other	419ms	0 KB	—	€1/mo	Costly
Google Tag Manager www.googletagmanager.com	Tag Manager	178ms	161 KB	38%	€1/mo	Optional

Unattributable

Other

Costly

Execution 419ms

Transfer 0 KB

Monthly Cost €1/mo

Google Tag Manager

Tag Manager

Optional

Execution 178ms

Transfer 161 KB

Unused 38%

Monthly Cost €1/mo

These scripts may cost more than they're worth

Unattributable adds 419ms and costs ~€1/month

64% 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

Unattributable takes 419ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

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.