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https://thebitsignal.com/companies/enel

Performance

· 27 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
90
GRADE
A
FIX
2
REVIEW
4
PASS
17
INFO
4

Performance-focused optimization plan with CWV assessment, top offenders, and time estimates

Mobile Desktop
78
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
93
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
96
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
50
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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

965 ms

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

2.19 s

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

906 ms

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

0.001

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

1.19 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.

4.00 s

Page Load Progression

440 ms
879 ms
1.3 s
1.8 s
2.2 s
2.6 s
3.1 s
3.5 s
Checks
27
17 PASS 4 REVIEW 2 FIX
D
Third-Party Impact
Action
77% third-party, 0 ms blocking
FIX
77% third-party, 0 ms blocking
Warning::
Third-party code accounts for 77% of page weight (958.3 KiB of 1.2 MiB)
Info::
Third-party blocking time is low (0 ms)
23%
77%
First-party Third-party
F
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

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

B
Page Weight Budget
1.2 MB transferred, 22 requests
REVIEW
1.2 MB transferred, 22 requests
Info::
Page weighs 2.3 MB (1.2 MB transferred)
Info::
22 HTTP requests
Info::
Estimated 0.25 g CO2 per page load
1.2 MB / 2.4 MB budget
1.2 MB transferred
22 requests
0.25 g CO2 per page load
Other 814.3 KiB 66%
JavaScript 215.3 KiB 17%
HTML 193.1 KiB 16%
Images 12.0 KiB 1%
Other 2.2 KiB 0%
Other 80 B 0%
0 2.4 MB 4.9 MB
Under budget
C
JS Execution Cost
Action
1720ms total JS execution
REVIEW
1720ms total JS execution
Warning::
https://thebitsignal.com/cdn-cgi/challenge-platfor...: 1398ms CPU time
Info::
Unattributable: 170ms CPU time
Info::
https://thebitsignal.com/companies/enel: 99ms CPU time
Info::
https://challenges.cloudflare.com/turnstile/v0/g/c...: 52ms CPU time
Info::
Third-party scripts: 52ms (3% of total)

Main Thread Breakdown

Script Evaluation 77% Other 13% Garbage Collection 3% Script Parsing & Compilation 3%
ScriptTotalScriptingParse/CompileParty
https://thebitsignal.com/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=a5221b514b6045bc1398ms1270ms44ms1st
Unattributable170ms11ms0ms1st
https://thebitsignal.com/companies/enel99ms9ms2ms1st
https://challenges.cloudflare.com/turnstile/v0/g/c787ce48cf6b/api.js?onload=Kncsd9&render=explicit52ms35ms9ms3rd
B
Main HTML Cache-Control
No Cache-Control header on main HTML response
REVIEW
No Cache-Control header on main HTML response
Info::
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.
C
Page Weight Inventory
Action
22 resources · 1.2 MB · 48 KB savings available
REVIEW
22 resources · 1.2 MB · 48 KB savings available
Warning::
Page weight 1.2 MB exceeds 1 MB target by 213 KB
Got: 1.2 MB Expected: ≤ 1 MB
Warning::
16 third-party resources (77% of weight)
Info::
1 resources over 200KB
22 resources · 1.2 MiB · 16 third-party 213.0 KiB over 1MB target
Other 66% · 816.6 KiB
JavaScript 17% · 215.3 KiB
Document 16% · 193.1 KiB
Image 1% · 12.0 KiB

~47.9 KiB of savings available

Remove unused JavaScript: 47.9 KiB
A+
Text Compression
All text resources are compressed
PASS
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A
Image Optimization
2 images, 0 KB saveable
PASS
2 images, 0 KB saveable
Info::
All images are well-optimized
2 images 12 KB
0 oversized -0 KB
2 legacy format
0 missing dimensions CLS risk
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+
JS Bundles
9 scripts, 48 KB unused
PASS
9 scripts, 48 KB unused
Warning::
https://thebitsignal.com/cdn-cgi/challenge-platfor...: 48 KB unused (26%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 48 KB
48 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://thebitsignal.com/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=a5221b514b6045bc188 KB48 KB (26%)✓1st
blob:https://thebitsignal.com/32bade1a-ef3f-403e-9f4f-843280ef73f30 KB—✓3rd
https://challenges.cloudflare.com/turnstile/v0/g/c787ce48cf6b/api.js?onload=Kncsd9&render=explicit28 KB—✓3rd
blob:https://thebitsignal.com/96ab68cd-79cb-456e-8888-727a05917539-0 KB—✓3rd
blob:https://challenges.cloudflare.com/9c5261a3-73e0-421b-9c04-6306aa67187e0 KB—✓3rd
blob:https://challenges.cloudflare.com/eb5e734c-5579-478a-9ebe-c8ef0b7c58ad-0 KB—✓3rd
blob:https://challenges.cloudflare.com/eb5e734c-5579-478a-9ebe-c8ef0b7c58ad-0 KB—✓3rd
blob:https://challenges.cloudflare.com/eb5e734c-5579-478a-9ebe-c8ef0b7c58ad-0 KB—✓3rd
blob:https://challenges.cloudflare.com/8929c796-7414-403b-9f98-33caeeaa0962-0 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

A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
PASS
HTTP/3 advertised via Alt-Svc
Info::
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
Info::
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
Info::
LCP image preload audit not available for this scan
A+
Server-Timing Observability
1 Server-Timing entries advertised
PASS
1 Server-Timing entries advertised
Info::
Server-Timing header advertises 1 timing entries
A
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Warning::
Compressed response missing `Vary` header
The page is served with `Content-Encoding: br` but has no `Vary` header. Without `Vary: Accept-Encoding`, intermediary caches (corporate proxies, ISP caches) may serve the compressed variant to clients that didn't send the matching `Accept-Encoding` -- the client sees garbled bytes. Add `Vary: Accept-Encoding` whenever the response is conditionally compressed.
Info::
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
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
A
JavaScript Blocking
1 JS blocking issue(s) detected
PASS
1 JS blocking issue(s) detected
Warning::
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.
A+
CSS Performance Depth
No CSS performance depth issues detected
PASS
No CSS performance depth issues detected
Info::
No CSS performance depth issues detected
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Asset Compression
No text asset hosts to measure
INFO
No text asset hosts to measure
Info::
No third-party or subdomain host served enough text assets to measure
Asset compression is measured per host, from one HEAD request against a sampled resource. Pages that serve all their JS and CSS from the document's own origin are covered by the document compression check instead.
Network Waterfall
22 requests over 3297ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 965 ms LCP 2.2 shttps://thebitsignal.com/companies/enel/companies/enel https://thebitsignal.com/companies/enel — 307 — 80 B — 88 ms — http/1.1https://thebitsignal.com/companies/enel/companies/enel https://thebitsignal.com/companies/enel — 403 — 4.4 KiB — 23 ms — h2https://thebitsignal.com/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=a5221b514b6045bc/cdn-cgi/challenge-platform/h/g/orc... https://thebitsignal.com/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=a5221b514b6045bc — 200 — 187.6 KiB — 78 ms — h3blob:https://thebitsignal.com/32bade1a-ef3f-403e-9f4f-843280ef73f3thebitsignal.com/32bade1a-ef3f-403e... blob:https://thebitsignal.com/32bade1a-ef3f-403e-9f4f-843280ef73f3 — -1 — 0 B — 0 ms — https://challenges.cloudflare.com/turnstile/v0/g/c787ce48cf6b/api.js?onload=Kncsd9&render=explicitchallenges.cloudflare.com/turnstile... https://challenges.cloudflare.com/turnstile/v0/g/c787ce48cf6b/api.js?onload=Kncsd9&render=explicit — 200 — 27.7 KiB — 79 ms — h3https://thebitsignal.com/favicon.ico/favicon.ico https://thebitsignal.com/favicon.ico — 200 — 6.3 KiB — 47 ms — h3https://thebitsignal.com/cdn-cgi/challenge-platform/h/g/fo/134091368:1793271609:7CYYQ6sP-j2JszOV4GAMO-dTSEjW35hlcPE5v9Yg0Xk/a5221b514b6045bc/LZYIgmsK1eEwnllUCjwGbVZmhOCdA5vI28P9ND4erN8-1793276137-1.2.1.1-jhhMi2GHc106b0_4mVCqeCmco5PFDxJZ1nm5qMEpjMcmGpZA3mG70weSGz7MoX9H/cdn-cgi/challenge-platform/h/g/fo/... https://thebitsignal.com/cdn-cgi/challenge-platform/h/g/fo/134091368:1793271609:7CYYQ6sP-j2JszOV4GAMO-dTSEjW35hlcPE5v9Yg0Xk/a5221b514b6045bc/LZYIgmsK1eEwnllUCjwGbVZmhOCdA5vI28P9ND4erN8-1793276137-1.2.1.1-jhhMi2GHc106b0_4mVCqeCmco5PFDxJZ1nm5qMEpjMcmGpZA3mG70weSGz7MoX9H — 200 — 80.3 KiB — 34 ms — h3https://thebitsignal.com/favicon.ico/favicon.ico https://thebitsignal.com/favicon.ico — 200 — 0 B — 1 ms — h3blob:https://thebitsignal.com/96ab68cd-79cb-456e-8888-727a05917539thebitsignal.com/96ab68cd-79cb-456e... blob:https://thebitsignal.com/96ab68cd-79cb-456e-8888-727a05917539 — 200 — -1 B — 41 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/turnstile/f/av0/rch/hmk8l/0x4AAAAAAADnPIDROrmt1Wwj/light/fbE/new/normal?lang=autochallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/turnstile/f/av0/rch/hmk8l/0x4AAAAAAADnPIDROrmt1Wwj/light/fbE/new/normal?lang=auto — 200 — 188.7 KiB — 107 ms — h3blob:https://challenges.cloudflare.com/9c5261a3-73e0-421b-9c04-6306aa67187echallenges.cloudflare.com/9c5261a3-... blob:https://challenges.cloudflare.com/9c5261a3-73e0-421b-9c04-6306aa67187e — -1 — 0 B — 0 ms — https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/fo/60837500:1793271615:Lv7Oovnv82WpWD8dDxodPC4XEfikb4zFasf1f3ChJS8/a5221b53cd9142ba/fK4rsZdccLZ9.uY_pAv9TJs8zQFRL.Kea24Nzw5WeoQ-1793276137-1.2.1.1-SM8ZPdrTv97YoNFHjnSKWe1vGL5S3j1oFux2diyjMTpe.Ty8EZlpzZGujD2CNjmDchallenges.cloudflare.com/cdn-cgi/c... 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— 401 — 1.6 KiB — 24 ms — h3https://hagen.challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/i/a5221b53cd9142ba/fK4rsZdccLZ9.uY_pAv9TJs8zQFRL.Kea24Nzw5WeoQ-1793276137-1.2.1.1-SM8ZPdrTv97YoNFHjnSKWe1vGL5S3j1oFux2diyjMTpe.Ty8EZlpzZGujD2CNjmDhagen.challenges.cloudflare.com/cdn... https://hagen.challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/i/a5221b53cd9142ba/fK4rsZdccLZ9.uY_pAv9TJs8zQFRL.Kea24Nzw5WeoQ-1793276137-1.2.1.1-SM8ZPdrTv97YoNFHjnSKWe1vGL5S3j1oFux2diyjMTpe.Ty8EZlpzZGujD2CNjmD — 204 — 581 B — 100 ms — h2https://ca1.cloudflarecaptcha.com/ca1.cloudflarecaptcha.com/ https://ca1.cloudflarecaptcha.com/ — -1 — 0 B — 0 ms — https://ca2.cloudflarecaptcha.com/ca2.cloudflarecaptcha.com/ https://ca2.cloudflarecaptcha.com/ — -1 — 0 B — 154 ms — blob:https://challenges.cloudflare.com/eb5e734c-5579-478a-9ebe-c8ef0b7c58adchallenges.cloudflare.com/eb5e734c-... blob:https://challenges.cloudflare.com/eb5e734c-5579-478a-9ebe-c8ef0b7c58ad — 200 — -1 B — 17 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/ci/a5221b53cd9142ba/1793276137939/5_uAT6UN2zt.yedMn5T0WDz2vsQNu2cC7WR6PUlJG7w-1793276137-1.3.1.1-cqR0LFH_brbFZDe3gNGtReQxSUjIRj9VtRa3IifIXNgzOdm6dZpE9PBMSjP6ceMLnFfVRt72lxVseiLjqblbjlkAPcl4Jf_sTkmPNd1VoiAYF5m9UirdAKAgDYoTTY8g0R55LZ7UzKHbuZtl69Ywrtawu7J0M7XjEZtiJKV0G_0yN8St0OYugQF3AyZVVrd.Jal2ObF02CgG2CnPsxNRSpfcgyG5ddK3bDQ1xI7.zAqfRCmy0L2A37W.Sz9fi_WXU37Q3mttI_V.qi2con_R7NRNztMmUuKBZOKArtpenKwjLjz4LMcxVxx8SjNpAg2gFxunU4IwDAXDZKUVvxkH.DtZD_xbvqQl06rWfbEgSjsiFwrBmGTRJ7YsEZHYOZVS33MHGv8p9kQQoKatHjlw.mvU_kOb23T4W9tVIK5IMSmjCYKXJxfpf4TqLi4G_1.d2gyw90ti1DQGrOI2N23bkwTGZXhEadGaQuiKD2ENa4VWBrNZICgtsj1Fn_ZE8OoRkFoy88ETjyosgwmM939PLk_5V7wccYGWLKCXJWD4T1xk_q99_NbQaz4Jpl.p0hQ2cInMWeWN.OuCWu5VLN3pLOWf7NJ1scmK9WqznyVYSmACbG1KCujhSBzTvOHfmbzd_Px9ptuv5t70UShph41YR1ZGv3swYj_9Ts1pqeUSfHm3sLn7egLW7gPFqWFhBNAH8Pc7VaUM8z01i4goJ2rbKuGGuZ77.32wweFgbssRU8Ychallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/ci/a5221b53cd9142ba/1793276137939/5_uAT6UN2zt.yedMn5T0WDz2vsQNu2cC7WR6PUlJG7w-1793276137-1.3.1.1-cqR0LFH_brbFZDe3gNGtReQxSUjIRj9VtRa3IifIXNgzOdm6dZpE9PBMSjP6ceMLnFfVRt72lxVseiLjqblbjlkAPcl4Jf_sTkmPNd1VoiAYF5m9UirdAKAgDYoTTY8g0R55LZ7UzKHbuZtl69Ywrtawu7J0M7XjEZtiJKV0G_0yN8St0OYugQF3AyZVVrd.Jal2ObF02CgG2CnPsxNRSpfcgyG5ddK3bDQ1xI7.zAqfRCmy0L2A37W.Sz9fi_WXU37Q3mttI_V.qi2con_R7NRNztMmUuKBZOKArtpenKwjLjz4LMcxVxx8SjNpAg2gFxunU4IwDAXDZKUVvxkH.DtZD_xbvqQl06rWfbEgSjsiFwrBmGTRJ7YsEZHYOZVS33MHGv8p9kQQoKatHjlw.mvU_kOb23T4W9tVIK5IMSmjCYKXJxfpf4TqLi4G_1.d2gyw90ti1DQGrOI2N23bkwTGZXhEadGaQuiKD2ENa4VWBrNZICgtsj1Fn_ZE8OoRkFoy88ETjyosgwmM939PLk_5V7wccYGWLKCXJWD4T1xk_q99_NbQaz4Jpl.p0hQ2cInMWeWN.OuCWu5VLN3pLOWf7NJ1scmK9WqznyVYSmACbG1KCujhSBzTvOHfmbzd_Px9ptuv5t70UShph41YR1ZGv3swYj_9Ts1pqeUSfHm3sLn7egLW7gPFqWFhBNAH8Pc7VaUM8z01i4goJ2rbKuGGuZ77.32wweFgbssRU8Y — 200 — 5.7 KiB — 25 ms — h3blob:https://challenges.cloudflare.com/eb5e734c-5579-478a-9ebe-c8ef0b7c58adchallenges.cloudflare.com/eb5e734c-... blob:https://challenges.cloudflare.com/eb5e734c-5579-478a-9ebe-c8ef0b7c58ad — 200 — -1 B — 15 ms — blobhttps://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/fo/60837500:1793271615:Lv7Oovnv82WpWD8dDxodPC4XEfikb4zFasf1f3ChJS8/a5221b53cd9142ba/fK4rsZdccLZ9.uY_pAv9TJs8zQFRL.Kea24Nzw5WeoQ-1793276137-1.2.1.1-SM8ZPdrTv97YoNFHjnSKWe1vGL5S3j1oFux2diyjMTpe.Ty8EZlpzZGujD2CNjmDchallenges.cloudflare.com/cdn-cgi/c... https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/fo/60837500:1793271615:Lv7Oovnv82WpWD8dDxodPC4XEfikb4zFasf1f3ChJS8/a5221b53cd9142ba/fK4rsZdccLZ9.uY_pAv9TJs8zQFRL.Kea24Nzw5WeoQ-1793276137-1.2.1.1-SM8ZPdrTv97YoNFHjnSKWe1vGL5S3j1oFux2diyjMTpe.Ty8EZlpzZGujD2CNjmD — 200 — 92.1 KiB — 76 ms — h3blob:https://challenges.cloudflare.com/8929c796-7414-403b-9f98-33caeeaa0962challenges.cloudflare.com/8929c796-... blob:https://challenges.cloudflare.com/8929c796-7414-403b-9f98-33caeeaa0962 — 200 — -1 B — 10 ms — blob
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
3% of JavaScript execution is third-party
First-party Third-party 52ms · 28KB · $1/mo
challenges.cloudflare.com
Other
Optional
Execution 52ms
Transfer 28 KB
Monthly Cost $1/mo

How third-party costs are calculated

Image Optimization
1 images, 6 KB total, 0 KB wasted
INFO

Image Optimization Audit

Total Images

1

Total Size

6 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.

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