Performance

· 27 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

100

SEO

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

1.80 s

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

2.54 s

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

410 ms

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

0.071

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

18.17 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.

27.51 s

Page Load Progression

668 ms

1.3 s

2.0 s

2.7 s

3.3 s

4.0 s

4.7 s

5.3 s

Checks

13 PASS 7 REVIEW 4 FIX

Page Weight Budget

Action

12.3 MB transferred, 31 requests

FIX

12.3 MB transferred, 31 requests

Page weighs 12.6 MB (12.3 MB transferred)

Images are 7.3 MB — compress or use modern formats

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

Got: 7.3 MB

31 HTTP requests

Estimated 2.6 g CO2 per page load

12.3 MB transferred

31 requests

2.6 g CO2 per page load

Images 7.3 MiB 59%

Other 4.5 MiB 37%

JavaScript 304.7 KiB 2%

Other 135.6 KiB 1%

Fonts 76.8 KiB 1%

CSS 38.1 KiB 0%

HTML 23.6 KiB 0%

Other 554 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

JS Execution Cost

Action

3709ms total JS execution

FIX

3709ms total JS execution

https://nexusceylontravels.com/assets/js/main.js?v...: 1396ms CPU time

https://nexusceylontravels.com/: 1000ms CPU time

Unattributable: 678ms CPU time

https://www.googletagmanager.com/gtag/js?id=G-6C95...: 438ms CPU time

https://translate.googleapis.com/_/translate_http/...: 197ms CPU time

Third-party scripts: 635ms (17% of total)

Main Thread Breakdown

Other 48% Script Evaluation 20% Style & Layout 20% Rendering 6% Script Parsing & Compilation 4%

Script	Total	Scripting	Parse/Compile	Party
https://nexusceylontravels.com/assets/js/main.js?v=smooth-20261029	1396ms	211ms	2ms	1st
https://nexusceylontravels.com/	1000ms	44ms	4ms	1st
Unattributable	678ms	18ms	0ms	1st
https://www.googletagmanager.com/gtag/js?id=G-6C95GZFBWB	438ms	329ms	81ms	3rd
https://translate.googleapis.com/_/translate_http/_/js/k=translate_http.tr.es.5r4lD1B6tMY.O/am=AAAADA/d=1/ed=1/rs=AN8SPfqr_oON_rpfjmGjPV5rKbvH4tP6_Q/m=el_main	197ms	143ms	44ms	3rd

Page Weight Inventory

Action

31 resources · 12.3 MB · 145 KB savings available

FIX

31 resources · 12.3 MB · 145 KB savings available

Page weight 12.3 MB exceeds 1 MB target by 11.3 MB

Got: 12.3 MB Expected: ≤ 1 MB

~145 KB of savings available

16 third-party resources (43% of weight)

7 resources over 200KB

31 resources · 12.3 MiB · 16 third-party 11.3 MiB over 1MB target

Image 60% · 7.4 MiB

Media 37% · 4.5 MiB

JavaScript 2% · 304.7 KiB

Font 1% · 76.8 KiB

CSS 0% · 38.1 KiB

Document 0% · 23.6 KiB

Other 0% · 554 B

~144.5 KiB of savings available

Remove unused JavaScript: 144.5 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

31 resources			12.3 MiB

HTTP Caching

Action

no-store (uncacheable)

FIX

no-store (uncacheable)

Cache-Control: no-store prevents all caching

Intentional for dynamic content, but increases server load for every page view.

Got: private, no-store

No ETag or Last-Modified header

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

Cache-Control

private, no-store

Directive	Value	Meaning
private	—	Only browser cache, not CDN/proxy
no-store	—	Never cache this response

Third-Party Impact

43% third-party, 0 ms blocking

REVIEW

43% third-party, 0 ms blocking

Third-party code accounts for 43% of page weight (5.2 MiB of 12.3 MiB)

Third-party blocking time is low (0 ms)

57%

43%

First-party Third-party

Image Optimization

12 images, 0 KB saveable

REVIEW

12 images, 0 KB saveable

All images are well-optimized

12 images 7.3 MB

0 oversized -0 KB

11 legacy format

0 missing dimensions CLS risk

JS Bundles

7 scripts, 145 KB unused

REVIEW

7 scripts, 145 KB unused

https://www.googletagmanager.com/gtag/js?id=G-6C95...: 74 KB unused (42%)

Consider code splitting or tree shaking to reduce unused code.

https://translate.googleapis.com/_/translate_http/...: 70 KB unused (64%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 145 KB

145 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://www.googletagmanager.com/gtag/js?id=G-6C95GZFBWB	177 KB	74 KB (42%)	✓	3rd
https://translate.googleapis.com/_/translate_http/_/js/k=translate_http.tr.es.5r4lD1B6tMY.O/am=AAAADA/d=1/ed=1/rs=AN8SPfqr_oON_rpfjmGjPV5rKbvH4tP6_Q/m=el_main	111 KB	70 KB (64%)	✓	3rd
https://nexusceylontravels.com/assets/js/journey-feedback.js?v=1	2 KB	—	✓	1st
https://nexusceylontravels.com/assets/js/journey-verification.js?v=2	2 KB	—	✓	1st
https://translate.google.com/translate_a/element.js?cb=googleTranslateElementInit	2 KB	—	✓	3rd
https://nexusceylontravels.com/assets/js/main.js?v=smooth-20261029	7 KB	—	✓	1st
https://translate-pa.googleapis.com/v1/supportedLanguages?client=te&display_language=es&key=AIzaSyBWDj0QJvVIx8XOhRegXX5_SrRWxhT5Hs4&callback=callback	3 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

Asset Compression

1 of 1 asset host serve text uncompressed

REVIEW

1 of 1 asset host serve text uncompressed

www.gstatic.com serves text assets uncompressed (assets: 3)

The sampled response carries a text content type but no Content-Encoding, so the bytes go over the wire raw. Text compression typically removes 70-80% of a JS or CSS payload -- this is the single cheapest transfer win available on this host.

Got: www.gstatic.com (text/css)

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.

JavaScript Blocking

2 JS blocking issue(s) detected

REVIEW

2 JS blocking issue(s) detected

1 render-blocking <script src> tag(s) without async/defer

Each `<script src=...>` without `async`, `defer`, or `type="module"` blocks HTML parsing while the browser fetches and executes it. The block lasts the entire round-trip + execution time -- on slow networks this translates directly into LCP delay. Add `defer` (executes after parse, in source order) for scripts that interact with the DOM, or `async` (executes whenever ready) for analytics / independent scripts. Module scripts (`type="module"`) are deferred by default.

Total JS execution time is 3.7 s -- over the 3.5s budget

Total JavaScript execution (parse + compile + run) across all scripts exceeds 3.5 seconds. On low-end devices that becomes 7-15+ seconds and shows up directly in TBT and INP. Reduce by: tree-shaking unused dependencies, code-splitting (dynamic `import()`), removing or deferring third-party tracking, and replacing heavy frameworks where they're not needed.

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

All text resources are properly compressed.

A+

Font Loading

2 fonts (77 KB)

PASS

2 fonts (77 KB)

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

Web fonts

77 KB total

Render-blocking

of 2

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

font unknown swap

Size 38 KB

Load time 71 ms

Start 970 ms

Risk FOUT — text flashes from fallback to web font

font woff2 swap

Size 39 KB

Load time 70 ms

Start 970 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)

Fixing the unchecked items could save ~11 KB and ~22 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

2 hints, 0 missing preconnects

PASS

2 hints, 0 missing preconnects

Page uses 2 resource hint(s)

Current Resource Hints

preconnect

preload

—

dns-prefetch

—

prefetch

—

2 resource hints configured

A+

HTTP/3 (QUIC)

HTTP/3 advertised via Alt-Svc

PASS

HTTP/3 advertised via Alt-Svc

HTTP/3 (QUIC) is supported

First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.

A+

Document Compression

Document response uses brotli

PASS

Document response uses brotli

Main HTML response uses brotli (Content-Encoding: br)

Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.

A+

LCP Image Preload

LCP preload audit not available

PASS

LCP preload audit not available

LCP image preload audit not available for this scan

A+

Main HTML Cache-Control

Main HTML uses no-store -- correct for sensitive/dynamic content

PASS

Main HTML uses no-store -- correct for sensitive/dynamic content

Got: private, no-store

A+

Server Response Intelligence

2 server-response signal(s) detected

PASS

2 server-response signal(s) detected

`Vary` header declared: rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch

The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).

No `ETag` or `Last-Modified` -- conditional GET not supported

Without either header, browsers can't issue conditional GETs and refresh always re-downloads the full response body even when nothing changed. Add `ETag: "<hash>"` (or `Last-Modified: <date>`) on cacheable responses; the server returns 304 Not Modified when the client's cached copy is still valid, saving bandwidth.

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

CSS Performance Depth

1 CSS depth issue(s) detected

PASS

1 CSS depth issue(s) detected

6 render-blocking stylesheet(s) -- recommended: <=3

Each `<link rel="stylesheet">` without a non-blocking `media` attribute holds up the first paint. Browsers download all of them before painting any content. Consolidate into 1-2 critical-path stylesheets; defer non-critical CSS via `<link rel="stylesheet" media="print" onload="this.media='all'">` or via the loadCSS pattern; inline above-the-fold CSS in `<style>` to short-circuit the request entirely.

Network Waterfall

31 requests over 3025ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

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

INFO

17% of JavaScript execution is third-party

First-party Third-party 635ms · 288KB · $8/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
Google Tag Manager www.googletagmanager.com	Tag Manager	438ms	177 KB	42%	$6/mo	Costly
translate.googleapis.com translate.googleapis.com	Other	197ms	111 KB	64%	$3/mo	Optional

Google Tag Manager

Tag Manager

Costly

Execution 438ms

Transfer 177 KB

Unused 42%

Monthly Cost $6/mo

translate.googleapis.com

Other

Optional

Execution 197ms

Transfer 111 KB

Unused 64%

Monthly Cost $3/mo

These scripts may cost more than they're worth

Google Tag Manager adds 438ms and costs ~$6/month

Google Tag Manager takes 438ms 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

64% of translate.googleapis.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

How third-party costs are calculated

Image Optimization

28 images, 2343 KB total, 2138 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

2343 KB

Oversized

Wasted

2138 KB

26 missing dimensions 3 missing lazy loading

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.