https://Psifos-participa.uchile.cl/psifos

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.

1.14 s

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

3.76 s

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

123 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.

1.33 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.

3.77 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 5 REVIEW 4 FIX

Page Weight Budget

Action

3.8 MB transferred, 18 requests

FIX

3.8 MB transferred, 18 requests

Page weighs 6.5 MB (3.8 MB transferred)

Images are 2.5 MB — compress or use modern formats

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

Got: 2.5 MB

JavaScript is 834 KB — consider code splitting or lazy loading

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

Got: 834 KB

Fonts are 399 KB — consider subsetting or using system fonts

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

Got: 399 KB

18 HTTP requests

Estimated 0.80 g CO2 per page load

3.8 MB transferred

18 requests

0.80 g CO2 per page load

Images 2.5 MiB 65%

JavaScript 834.5 KiB 21%

Fonts 399.0 KiB 10%

CSS 69.8 KiB 2%

Other 28.6 KiB 1%

Other 10.1 KiB 0%

HTML 1.1 KiB 0%

Other 439 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

JS Bundles

Action

4 scripts, 641 KB unused

FIX

4 scripts, 641 KB unused

https://psifos-participa.uchile.cl/assets/index-Bf...: 641 KB unused (78%)

Consider code splitting or tree shaking to reduce unused code.

Total unused JavaScript: 641 KB

641 KB unused JavaScript

Downloaded but never executed on this page.

Script	Size	Unused	Minified	Party
https://psifos-participa.uchile.cl/assets/index-BfOl8RJD.js	822 KB	641 KB (78%)	✓	1st
https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js	6 KB	—	✓	3rd
https://kit.fontawesome.com/c67b07b3fc.js	6 KB	—	✓	3rd
https://psifos-participa.uchile.cl/node_modules/@creativebulma/bulma-collapsible/dist/js/bulma-collapsible.min.js	1 KB	—	✓	1st

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 Inventory

Action

18 resources · 3.8 MB · 641 KB savings available

FIX

18 resources · 3.8 MB · 641 KB savings available

Page weight 3.8 MB exceeds 1 MB target by 2.8 MB

Got: 3.8 MB Expected: ≤ 1 MB

~641 KB of savings available

9 third-party resources (1% of weight)

3 resources over 200KB

18 resources · 3.8 MiB · 9 third-party 2.8 MiB over 1MB target

Image 66% · 2.5 MiB

JavaScript 21% · 834.5 KiB

Font 10% · 399.0 KiB

CSS 3% · 98.5 KiB

Document 0% · 1.1 KiB

Other 0% · 439 B

~641.3 KiB of savings available

Remove unused JavaScript: 641.3 KiB

#	Resource	Type	Size	Cache	Unused	3rd party	Issues

18 resources			3.8 MiB

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.

Last-Modified header present

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

HTTP/3 (QUIC)

HTTP/3 not advertised

REVIEW

HTTP/3 not advertised

HTTP/3 (QUIC) is not advertised

HTTP/3 isn't advertised via Alt-Svc and the worker didn't negotiate h3. HTTP/3 reduces handshake latency (1-RTT instead of 2-3 RTTs) and is more resilient on lossy connections. Most modern CDNs (Cloudflare, Fastly, AWS CloudFront, Google Cloud CDN) support HTTP/3 with a single config switch -- consider enabling for mobile-heavy workloads.

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.

Main HTML Cache-Control

No Cache-Control header on main HTML response

REVIEW

No Cache-Control header on main HTML response

Main HTML response has no Cache-Control header

Without an explicit Cache-Control, browsers fall back to heuristic caching (~10% of Last-Modified age). Set `Cache-Control: no-cache` or `max-age=300` for HTML to control freshness explicitly -- prevents stale auth state and SPA shell drift.

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.

Green Hosting

Action

Whether the site is served from green-energy infrastructure

REVIEW

Green Hosting

No green hosting detected

A+

Third-Party Impact

1% third-party, 0 ms blocking

PASS

1% third-party, 0 ms blocking

Third-party code accounts for 1% of page weight (40.1 KiB of 3.8 MiB)

Third-party blocking time is low (0 ms)

99%

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+

Image Optimization

4 images, 0 KB saveable

PASS

4 images, 0 KB saveable

All images are well-optimized

4 images 2.5 MB

0 oversized -0 KB

1 legacy format

0 missing dimensions CLS risk

A+

JS Execution Cost

290ms total JS execution

PASS

290ms total JS execution

https://psifos-participa.uchile.cl/assets/index-Bf...: 190ms CPU time

Unattributable: 100ms CPU time

Third-party scripts: 100ms (35% of total)

Main Thread Breakdown

Script Evaluation 59% Other 30% Style & Layout 6% Parse HTML & CSS 3%

Script	Total	Scripting	Parse/Compile	Party
https://psifos-participa.uchile.cl/assets/index-BfOl8RJD.js	190ms	185ms	2ms	1st
Unattributable	100ms	2ms	0ms	3rd

A+

Font Loading

1 fonts (399 KB)

PASS

1 fonts (399 KB)

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

Web fonts

399 KB total

Render-blocking

of 1

Dominant font-display

swap

Most common across fonts

Font loading timeline

Transfer FOIT (block) FOUT (swap)

Arial-DHXpgMHe.ttf ttf swap

Size 399 KB

Load time 79 ms

Start 1.0 s

Risk FOUT — text flashes from fallback to web font

Convert to woff2 for ~30% smaller file size
Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need

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 ~319 KB and ~638 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+

LCP Image Preload

LCP preload audit not available

PASS

LCP preload audit not available

LCP image preload audit not available for this scan

A+

Server Response Intelligence

2 server-response signal(s) detected

PASS

2 server-response signal(s) detected

`Vary` header declared: Accept-Encoding

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).

`Last-Modified` present -- timestamp-based conditional GET supported

Consider also setting `ETag` for stronger revalidation -- ETags are content hashes that don't suffer from clock-skew or DST issues. Last-Modified alone is functional for conditional GETs and not a bug.

Network Waterfall

18 requests over 1344ms

INFO

HTML JavaScript CSS Images Fonts XHR/Fetch Other

Third-Party Script Cost

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

INFO

35% of JavaScript execution is third-party

First-party Third-party 100ms · 0KB · CL$742/mo

Script	Category	Execution	Transfer	Unused	Monthly Cost	Verdict
Unattributable Unattributable	Other	100ms	0 KB	—	CL$742/mo	Costly

Unattributable

Other

Costly

Execution 100ms

Transfer 0 KB

Monthly Cost CL$742/mo

These scripts may cost more than they're worth

Unattributable adds 100ms and costs ~CL$742/month

Unattributable takes 100ms 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

Real-User Performance (CrUX)

Field metrics from the Chrome User Experience Report

INFO

Chrome User Experience (CrUX)

Real-user metrics from the Chrome UX Report (2026-04-11 — 2026-05-08)

LCP (p75)

2711 ms

69% good

INP (p75)

0 ms

0% good

CLS (p75)

0.580

41% good

FCP (p75)

2295 ms

TTFB (p75)

828 ms

Image Optimization

1 images, 0 KB total, 0 KB wasted

INFO

Image Optimization Audit

Total Images

Total Size

0 KB

1 missing dimensions

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

Browse & Analyze

Learn

Performance

Page Load Progression

Green Hosting

Font loading timeline

Optimization checklist

These scripts may cost more than they're worth

Chrome User Experience (CrUX)

Image Optimization Audit