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https://www.jcl.energy

Performance

· 28 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
85
GRADE
B
FIX
4
REVIEW
5
PASS
15
INFO
4

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

Mobile Desktop
54
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
96
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.
92
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.

2.46 s

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

11.13 s

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

670 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.

3.22 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.

11.13 s

Page Load Progression

745 ms
1.5 s
2.2 s
3.0 s
3.7 s
4.5 s
5.2 s
6.0 s
Checks
28
15 PASS 5 REVIEW 4 FIX
D
Page Weight Budget
Action
2.1 MB transferred, 61 requests
FIX
2.1 MB transferred, 61 requests
Info::
Page weighs 4.4 MB (2.1 MB transferred)
Warning::
JavaScript is 1004 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1004 KB
Info::
61 HTTP requests
Info::
Estimated 0.44 g CO2 per page load
2.1 MB / 2.4 MB budget
2.1 MB transferred
61 requests
0.44 g CO2 per page load
JavaScript 1003.6 KiB 47%
Images 917.6 KiB 43%
Fonts 134.5 KiB 6%
CSS 44.2 KiB 2%
HTML 22.3 KiB 1%
Other 6.6 KiB 0%
Other 4.6 KiB 0%
Other 1.9 KiB 0%
0 2.4 MB 4.9 MB
Approaching limit

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

D
JS Execution Cost
Action
3250ms total JS execution
FIX
3250ms total JS execution
Warning::
https://www.jcl.energy/: 761ms CPU time
Warning::
Unattributable: 565ms CPU time
Warning::
https://edge.fullstory.com/s/fs.js?org=o-24MHWM-na...: 538ms CPU time
Warning::
https://js.hs-analytics.net/analytics/178995990000...: 518ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-E3GZ...: 304ms CPU time
Info::
Third-party scripts: 1590ms (49% of total)

Main Thread Breakdown

Script Evaluation 53% Other 24% Style & Layout 13% Script Parsing & Compilation 4%
ScriptTotalScriptingParse/CompileParty
https://www.jcl.energy/761ms127ms2ms1st
Unattributable565ms127ms0ms1st
https://edge.fullstory.com/s/fs.js?org=o-24MHWM-na1538ms402ms22ms3rd
https://js.hs-analytics.net/analytics/1789959900000/24421275.js518ms353ms9ms3rd
https://www.googletagmanager.com/gtag/js?id=G-E3GZP5Q418304ms265ms37ms3rd
https://www.jcl.energy/_nuxt/C3i5kfut.js278ms221ms0ms1st
https://www.googletagmanager.com/gtag/js?id=AW-17012445944162ms131ms30ms3rd
https://js.hscollectedforms.net/collectedforms.js69ms57ms6ms3rd
https://www.jcl.energy/_nuxt/DBvxyBpE.js55ms52ms0ms1st
D
JS Bundles
Action
30 scripts, 346 KB unused
FIX
30 scripts, 346 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=AW-170...: 110 KB unused (76%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-E3GZ...: 68 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=AW-170...: 68 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.jcl.energy/_nuxt/CgbXtZQp.js: 46 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://edge.fullstory.com/s/fs.js?org=o-24MHWM-na...: 30 KB unused (38%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 346 KB
346 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=AW-17012445944&cx=c&gtm=4e69g1146 KB110 KB (76%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-E3GZP5Q418162 KB68 KB (42%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-17012445944146 KB68 KB (47%)✓3rd
https://www.jcl.energy/_nuxt/CgbXtZQp.js72 KB46 KB (69%)✓1st
https://edge.fullstory.com/s/fs.js?org=o-24MHWM-na180 KB30 KB (38%)✓3rd
https://www.jcl.energy/_nuxt/B4IKQn3F.js86 KB24 KB (28%)✓1st
https://www.jcl.energy/_nuxt/CLmx7Oqj.js14 KB—✓1st
https://www.jcl.energy/_nuxt/BCFFW011.js2 KB—✓1st
https://www.jcl.energy/_nuxt/8gBTCIwE.js2 KB—✓1st
https://www.jcl.energy/_nuxt/CxiGgwzJ.js11 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

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

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

D
Page Weight Inventory
Action
61 resources · 2.1 MB · 346 KB savings available
FIX
61 resources · 2.1 MB · 346 KB savings available
Warning::
Page weight 2.1 MB exceeds 1 MB target by 1.1 MB
Got: 2.1 MB Expected: ≤ 1 MB
Info::
~346 KB of savings available
Info::
17 third-party resources (30% of weight)
Info::
2 resources over 200KB
61 resources · 2.1 MiB · 17 third-party 1.1 MiB over 1MB target
JavaScript 47% · 1003.6 KiB
Image 43% · 924.1 KiB
Font 6% · 134.5 KiB
CSS 2% · 44.2 KiB
Document 1% · 22.3 KiB
Other 0% · 6.5 KiB

~345.9 KiB of savings available

Remove unused JavaScript: 345.9 KiB
B
Image Optimization
7 images, 0 KB saveable
REVIEW
7 images, 0 KB saveable
Info::
All images are well-optimized
7 images 918 KB
0 oversized -0 KB
7 legacy format
0 missing dimensions CLS risk
B
HTTP/3 (QUIC)
HTTP/3 not advertised
REVIEW
HTTP/3 not advertised
Info::
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.
B
Server-Timing Observability
No Server-Timing header found
REVIEW
No Server-Timing header found
Info::
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.
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
public, max-age=0, s-maxage=60, must-revalidate
REVIEW
public, max-age=0, s-maxage=60, must-revalidate
Info::
Cache-Control header is set
Got: public, max-age=0, s-maxage=60, must-revalidate
Info::
CDN TTL: 1 minute (s-maxage=60)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

public, max-age=0, s-maxage=60, must-revalidate

DirectiveValueMeaning
public—Any cache may store this response
max-age0Cache for 0 seconds
s-maxage60CDN caches for 1 minute
must-revalidate—Must recheck with server after expiry
A
Third-Party Impact
30% third-party, 0 ms blocking
PASS
30% third-party, 0 ms blocking
Info::
Third-party code accounts for 30% of page weight (639.4 KiB of 2.1 MiB)
Info::
Third-party blocking time is low (0 ms)
70%
30%
First-party Third-party
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+
Font Loading
5 fonts (134 KB)
PASS
5 fonts (134 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

134 KB total

Render-blocking

0

of 5

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 2.5 s LCP 11.1 shttps://www.jcl.energy/fonts/rajdhani-700.woff2rajdhani-700.woff2 https://www.jcl.energy/fonts/rajdhani-700.woff2 — 10.3 KiB — 41 ms — font-display: swaphttps://www.jcl.energy/fonts/rajdhani-600.woff2rajdhani-600.woff2 https://www.jcl.energy/fonts/rajdhani-600.woff2 — 10.4 KiB — 91 ms — font-display: swaphttps://www.jcl.energy/fonts/roboto-400.woff2roboto-400.woff2 https://www.jcl.energy/fonts/roboto-400.woff2 — 37.9 KiB — 48 ms — font-display: swaphttps://www.jcl.energy/fonts/roboto-700.woff2roboto-700.woff2 https://www.jcl.energy/fonts/roboto-700.woff2 — 37.9 KiB — 32 ms — font-display: swaphttps://www.jcl.energy/fonts/roboto-600.woff2roboto-600.woff2 https://www.jcl.energy/fonts/roboto-600.woff2 — 37.9 KiB — 39 ms — font-display: swap
rajdhani-700.woff2 woff2 swap
Size 10 KB
Load time 41 ms
Start 119 ms
Risk FOUT — text flashes from fallback to web font
rajdhani-600.woff2 woff2 swap
Size 10 KB
Load time 91 ms
Start 119 ms
Risk FOUT — text flashes from fallback to web font
roboto-400.woff2 woff2 swap
Size 38 KB
Load time 48 ms
Start 120 ms
Risk FOUT — text flashes from fallback to web font
roboto-700.woff2 woff2 swap
Size 38 KB
Load time 32 ms
Start 271 ms
Risk FOUT — text flashes from fallback to web font
roboto-600.woff2 woff2 swap
Size 38 KB
Load time 39 ms
Start 271 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)
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
3 hints, 0 missing preconnects
PASS
3 hints, 0 missing preconnects
Info::
Page uses 3 resource hint(s)

Current Resource Hints

preconnect
—
preload
3
dns-prefetch
—
prefetch
—

3 resource hints configured

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+
Asset Compression
All 1 asset host use brotli
PASS
All 1 asset host use brotli
Info::
www.googletagmanager.com serves assets with brotli (assets: 3)
Got: www.googletagmanager.com (application/javascript)
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+
Main HTML Cache-Control
Main HTML max-age=0 (≤ 5min) is appropriate
PASS
Main HTML max-age=0 (≤ 5min) is appropriate
Info::
Main HTML max-age=0 (≤ 5min) is appropriate
Got: public, max-age=0, s-maxage=60, must-revalidate
A+
Server Response Intelligence
2 server-response signal(s) detected
PASS
2 server-response signal(s) detected
Info::
`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).
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::
4 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
1 CSS depth issue(s) detected
PASS
1 CSS depth issue(s) detected
Warning::
7 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
61 requests over 3649ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 2.5 s LCP 11.1 shttps://www.jcl.energy// https://www.jcl.energy/ — 200 — 22.3 KiB — 98 ms — h2https://www.jcl.energy/_nuxt/entry.BxcX56ZW.css/_nuxt/entry.BxcX56ZW.css https://www.jcl.energy/_nuxt/entry.BxcX56ZW.css — 200 — 14.2 KiB — 101 ms — h2https://www.jcl.energy/_nuxt/HighlightCards.BaYHsL7Q.css/_nuxt/HighlightCards.BaYHsL7Q.css https://www.jcl.energy/_nuxt/HighlightCards.BaYHsL7Q.css — 200 — 1.8 KiB — 97 ms — h2https://www.jcl.energy/_nuxt/useForm.ng3YSTH4.css/_nuxt/useForm.ng3YSTH4.css https://www.jcl.energy/_nuxt/useForm.ng3YSTH4.css — 200 — 1.4 KiB — 95 ms — h2https://www.jcl.energy/fonts/rajdhani-700.woff2/fonts/rajdhani-700.woff2 https://www.jcl.energy/fonts/rajdhani-700.woff2 — 200 — 10.3 KiB — 41 ms — h2https://www.jcl.energy/fonts/rajdhani-600.woff2/fonts/rajdhani-600.woff2 https://www.jcl.energy/fonts/rajdhani-600.woff2 — 200 — 10.4 KiB — 91 ms — h2https://www.jcl.energy/fonts/roboto-400.woff2/fonts/roboto-400.woff2 https://www.jcl.energy/fonts/roboto-400.woff2 — 200 — 37.9 KiB — 48 ms — h2https://www.jcl.energy/_nuxt/B4IKQn3F.js/_nuxt/B4IKQn3F.js https://www.jcl.energy/_nuxt/B4IKQn3F.js — 200 — 85.7 KiB — 82 ms — h2https://www.jcl.energy/_nuxt/C3i5kfut.js/_nuxt/C3i5kfut.js https://www.jcl.energy/_nuxt/C3i5kfut.js — 200 — 12.4 KiB — 99 ms — h2https://www.jcl.energy/_nuxt/DBvxyBpE.js/_nuxt/DBvxyBpE.js https://www.jcl.energy/_nuxt/DBvxyBpE.js — 200 — 3.5 KiB — 100 ms — h2https://www.jcl.energy/_nuxt/D83puLab.js/_nuxt/D83puLab.js https://www.jcl.energy/_nuxt/D83puLab.js — 200 — 1.4 KiB — 125 ms — h2https://www.jcl.energy/_nuxt/l3J7YCW8.js/_nuxt/l3J7YCW8.js https://www.jcl.energy/_nuxt/l3J7YCW8.js — 200 — 132.9 KiB — 129 ms — h2https://www.jcl.energy/_nuxt/DcNgiFxv.js/_nuxt/DcNgiFxv.js https://www.jcl.energy/_nuxt/DcNgiFxv.js — 200 — 1.6 KiB — 115 ms — h2https://www.jcl.energy/_nuxt/BKRkGmbI.js/_nuxt/BKRkGmbI.js https://www.jcl.energy/_nuxt/BKRkGmbI.js — 200 — 3.8 KiB — 112 ms — h2https://www.jcl.energy/_nuxt/DVtuQ5U8.js/_nuxt/DVtuQ5U8.js https://www.jcl.energy/_nuxt/DVtuQ5U8.js — 200 — 1.6 KiB — 118 ms — h2https://www.jcl.energy/_nuxt/8gBTCIwE.js/_nuxt/8gBTCIwE.js https://www.jcl.energy/_nuxt/8gBTCIwE.js — 200 — 2.2 KiB — 121 ms — h2https://www.jcl.energy/_nuxt/CxiGgwzJ.js/_nuxt/CxiGgwzJ.js https://www.jcl.energy/_nuxt/CxiGgwzJ.js — 200 — 10.7 KiB — 129 ms — h2https://www.jcl.energy/_nuxt/S_IEa1nC.js/_nuxt/S_IEa1nC.js https://www.jcl.energy/_nuxt/S_IEa1nC.js — 200 — 3.7 KiB — 125 ms — h2https://www.jcl.energy/_nuxt/BrnpY0SR.js/_nuxt/BrnpY0SR.js https://www.jcl.energy/_nuxt/BrnpY0SR.js — 200 — 4.1 KiB — 132 ms — h2https://www.jcl.energy/_nuxt/BCFFW011.js/_nuxt/BCFFW011.js https://www.jcl.energy/_nuxt/BCFFW011.js — 200 — 2.1 KiB — 130 ms — h2https://www.jcl.energy/img/logos/jcl-logo-white.png/img/logos/jcl-logo-white.png https://www.jcl.energy/img/logos/jcl-logo-white.png — 200 — 9.5 KiB — 138 ms — h2https://www.jcl.energy/img/logos/jcl-logo.png/img/logos/jcl-logo.png https://www.jcl.energy/img/logos/jcl-logo.png — 200 — 9.7 KiB — 135 ms — h2https://www.jcl.energy/media/img/photos/tech-rigging-radiators.jpg/media/img/photos/tech-rigging-radi... https://www.jcl.energy/media/img/photos/tech-rigging-radiators.jpg — 200 — 423.1 KiB — 370 ms — h2https://www.jcl.energy/img/logos/jcl-bolt.png/img/logos/jcl-bolt.png https://www.jcl.energy/img/logos/jcl-bolt.png — 200 — 10.5 KiB — 140 ms — h2https://www.jcl.energy/media/img/comp-assets/grain.png/media/img/comp-assets/grain.png https://www.jcl.energy/media/img/comp-assets/grain.png — 200 — 95.8 KiB — 44 ms — h2https://www.jcl.energy/media/img/photos/sunrise-team.jpg/media/img/photos/sunrise-team.jpg https://www.jcl.energy/media/img/photos/sunrise-team.jpg — 200 — 368.1 KiB — 344 ms — h2https://www.jcl.energy/fonts/roboto-700.woff2/fonts/roboto-700.woff2 https://www.jcl.energy/fonts/roboto-700.woff2 — 200 — 37.9 KiB — 32 ms — h2https://www.jcl.energy/fonts/roboto-600.woff2/fonts/roboto-600.woff2 https://www.jcl.energy/fonts/roboto-600.woff2 — 200 — 37.9 KiB — 39 ms — h2https://www.jcl.energy/_nuxt/index.BLW85-S0.css/_nuxt/index.BLW85-S0.css https://www.jcl.energy/_nuxt/index.BLW85-S0.css — 200 — 3.7 KiB — 29 ms — h2https://js.hs-scripts.com/24421275.jsjs.hs-scripts.com/24421275.js https://js.hs-scripts.com/24421275.js — 200 — 1.3 KiB — 464 ms — h2
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s FCP 2.5 s LCP 11.1 shttps://www.jcl.energy// https://www.jcl.energy/ — 200 — 22.3 KiB — 98 ms — h2https://www.jcl.energy/_nuxt/entry.BxcX56ZW.css/_nuxt/entry.BxcX56ZW.css https://www.jcl.energy/_nuxt/entry.BxcX56ZW.css — 200 — 14.2 KiB — 101 ms — h2https://www.jcl.energy/_nuxt/HighlightCards.BaYHsL7Q.css/_nuxt/HighlightCards.BaYHsL7Q.css https://www.jcl.energy/_nuxt/HighlightCards.BaYHsL7Q.css — 200 — 1.8 KiB — 97 ms — h2https://www.jcl.energy/_nuxt/useForm.ng3YSTH4.css/_nuxt/useForm.ng3YSTH4.css https://www.jcl.energy/_nuxt/useForm.ng3YSTH4.css — 200 — 1.4 KiB — 95 ms — h2https://www.jcl.energy/fonts/rajdhani-700.woff2/fonts/rajdhani-700.woff2 https://www.jcl.energy/fonts/rajdhani-700.woff2 — 200 — 10.3 KiB — 41 ms — h2https://www.jcl.energy/fonts/rajdhani-600.woff2/fonts/rajdhani-600.woff2 https://www.jcl.energy/fonts/rajdhani-600.woff2 — 200 — 10.4 KiB — 91 ms — h2https://www.jcl.energy/fonts/roboto-400.woff2/fonts/roboto-400.woff2 https://www.jcl.energy/fonts/roboto-400.woff2 — 200 — 37.9 KiB — 48 ms — h2https://www.jcl.energy/_nuxt/B4IKQn3F.js/_nuxt/B4IKQn3F.js https://www.jcl.energy/_nuxt/B4IKQn3F.js — 200 — 85.7 KiB — 82 ms — h2https://www.jcl.energy/_nuxt/C3i5kfut.js/_nuxt/C3i5kfut.js https://www.jcl.energy/_nuxt/C3i5kfut.js — 200 — 12.4 KiB — 99 ms — h2https://www.jcl.energy/_nuxt/DBvxyBpE.js/_nuxt/DBvxyBpE.js https://www.jcl.energy/_nuxt/DBvxyBpE.js — 200 — 3.5 KiB — 100 ms — h2https://www.jcl.energy/_nuxt/D83puLab.js/_nuxt/D83puLab.js https://www.jcl.energy/_nuxt/D83puLab.js — 200 — 1.4 KiB — 125 ms — h2https://www.jcl.energy/_nuxt/l3J7YCW8.js/_nuxt/l3J7YCW8.js https://www.jcl.energy/_nuxt/l3J7YCW8.js — 200 — 132.9 KiB — 129 ms — h2https://www.jcl.energy/_nuxt/DcNgiFxv.js/_nuxt/DcNgiFxv.js https://www.jcl.energy/_nuxt/DcNgiFxv.js — 200 — 1.6 KiB — 115 ms — h2https://www.jcl.energy/_nuxt/BKRkGmbI.js/_nuxt/BKRkGmbI.js https://www.jcl.energy/_nuxt/BKRkGmbI.js — 200 — 3.8 KiB — 112 ms — h2https://www.jcl.energy/_nuxt/DVtuQ5U8.js/_nuxt/DVtuQ5U8.js https://www.jcl.energy/_nuxt/DVtuQ5U8.js — 200 — 1.6 KiB — 118 ms — h2https://www.jcl.energy/_nuxt/8gBTCIwE.js/_nuxt/8gBTCIwE.js https://www.jcl.energy/_nuxt/8gBTCIwE.js — 200 — 2.2 KiB — 121 ms — h2https://www.jcl.energy/_nuxt/CxiGgwzJ.js/_nuxt/CxiGgwzJ.js https://www.jcl.energy/_nuxt/CxiGgwzJ.js — 200 — 10.7 KiB — 129 ms — h2https://www.jcl.energy/_nuxt/S_IEa1nC.js/_nuxt/S_IEa1nC.js https://www.jcl.energy/_nuxt/S_IEa1nC.js — 200 — 3.7 KiB — 125 ms — h2https://www.jcl.energy/_nuxt/BrnpY0SR.js/_nuxt/BrnpY0SR.js https://www.jcl.energy/_nuxt/BrnpY0SR.js — 200 — 4.1 KiB — 132 ms — h2https://www.jcl.energy/_nuxt/BCFFW011.js/_nuxt/BCFFW011.js https://www.jcl.energy/_nuxt/BCFFW011.js — 200 — 2.1 KiB — 130 ms — h2https://www.jcl.energy/img/logos/jcl-logo-white.png/img/logos/jcl-logo-white.png https://www.jcl.energy/img/logos/jcl-logo-white.png — 200 — 9.5 KiB — 138 ms — 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h2https://edge.fullstory.com/s/settings/o-24MHWM-na1/v1/webedge.fullstory.com/s/settings/o-24M... https://edge.fullstory.com/s/settings/o-24MHWM-na1/v1/web — 200 — 1.9 KiB — 187 ms — h2https://www.jcl.energy/_nuxt/CLmx7Oqj.js/_nuxt/CLmx7Oqj.js https://www.jcl.energy/_nuxt/CLmx7Oqj.js — 200 — 14.4 KiB — 45 ms — h2https://www.jcl.energy/_nuxt/B90RfhVc.js/_nuxt/B90RfhVc.js https://www.jcl.energy/_nuxt/B90RfhVc.js — 200 — 2.0 KiB — 61 ms — h2https://www.jcl.energy/_nuxt/request.CjgOzOph.css/_nuxt/request.CjgOzOph.css https://www.jcl.energy/_nuxt/request.CjgOzOph.css — 200 — 2.9 KiB — 39 ms — h2https://www.jcl.energy/_nuxt/Qjr80XDc.js/_nuxt/Qjr80XDc.js https://www.jcl.energy/_nuxt/Qjr80XDc.js — 200 — 4.6 KiB — 47 ms — h2https://www.jcl.energy/_nuxt/Bntrx5Sz.js/_nuxt/Bntrx5Sz.js https://www.jcl.energy/_nuxt/Bntrx5Sz.js — 200 — 2.4 KiB — 62 ms — h2https://www.jcl.energy/_nuxt/CtaBand.DMGuwzPD.css/_nuxt/CtaBand.DMGuwzPD.css https://www.jcl.energy/_nuxt/CtaBand.DMGuwzPD.css — 200 — 1.4 KiB — 39 ms — h2https://www.jcl.energy/_nuxt/index.DYc-6c1b.css/_nuxt/index.DYc-6c1b.css https://www.jcl.energy/_nuxt/index.DYc-6c1b.css — 200 — 2.6 KiB — 49 ms — h2https://www.jcl.energy/_nuxt/BV7S2oJO.js/_nuxt/BV7S2oJO.js https://www.jcl.energy/_nuxt/BV7S2oJO.js — 200 — 2.2 KiB — 73 ms — h2https://www.jcl.energy/_nuxt/CgbXtZQp.js/_nuxt/CgbXtZQp.js https://www.jcl.energy/_nuxt/CgbXtZQp.js — 200 — 72.1 KiB — 82 ms — h2https://www.jcl.energy/_nuxt/B222QPSX.js/_nuxt/B222QPSX.js https://www.jcl.energy/_nuxt/B222QPSX.js — 200 — 4.9 KiB — 64 ms — h2https://www.jcl.energy/_nuxt/useContentPage.BG0PubV0.css/_nuxt/useContentPage.BG0PubV0.css https://www.jcl.energy/_nuxt/useContentPage.BG0PubV0.css — 200 — 12.3 KiB — 68 ms — h2https://www.jcl.energy/_nuxt/DhPDg7pB.js/_nuxt/DhPDg7pB.js https://www.jcl.energy/_nuxt/DhPDg7pB.js — 200 — 2.0 KiB — 76 ms — h2https://www.jcl.energy/_nuxt/builds/meta/f626a950-e115-4a01-8644-4eaa0bf5e0fd.json/_nuxt/builds/meta/f626a950-e115-4a... 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https://www.google-analytics.com/g/collect?v=2&tid=G-E3GZP5Q418&gtm=45je69g1v868364516za200zd868364516xf1&_p=1789959973029&gcs=G101&gcd=13p3t3l3l5l1&npa=0&dma=0&cid=570630421.1789959973&frm=0&pscdl=denied&rcb=3&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B153.0.8010.47%7CNot_A%2520Brand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=115616985~115938466~115938468~118897920~118897930~120213116~120385423~120469145~120469153&dp=%2F&sid=1789959973&sct=1&seg=0&dl=https%3A%2F%2Fwww.jcl.energy%2F&dt=Transformer%20Sales%2C%20Rentals%20%26%20Service%20%7C%20JCL%20Energy&en=page_view&_fv=1&_nsi=1&_ss=1&_ee=1&ep.anonymize_ip=true&tfd=601 — 204 — 549 B — 90 ms — h2https://rs.fullstory.com/rec/pagers.fullstory.com/rec/page https://rs.fullstory.com/rec/page — 200 — 900 B — 209 ms — h2https://js.hsadspixel.net/pixels.jsjs.hsadspixel.net/pixels.js https://js.hsadspixel.net/pixels.js — 200 — 5.3 KiB — 99 ms — h2https://js.hscollectedforms.net/collectedforms.jsjs.hscollectedforms.net/collectedfo... https://js.hscollectedforms.net/collectedforms.js — 200 — 27.1 KiB — 201 ms — h2https://js.hs-banner.com/v2/24421275/banner.jsjs.hs-banner.com/v2/24421275/banner... https://js.hs-banner.com/v2/24421275/banner.js — 200 — 24.0 KiB — 461 ms — h2https://js.hs-analytics.net/analytics/1789959900000/24421275.jsjs.hs-analytics.net/analytics/17899... https://js.hs-analytics.net/analytics/1789959900000/24421275.js — 200 — 42.5 KiB — 672 ms — h2https://forms.hscollectedforms.net/collected-forms/v1/config/json?portalId=24421275&utk=forms.hscollectedforms.net/collecte... https://forms.hscollectedforms.net/collected-forms/v1/config/json?portalId=24421275&utk= — 200 — 685 B — 147 ms — h2https://api.hubapi.com/hs-script-loader-public/v2/config/pixels-and-events/json?portalId=24421275api.hubapi.com/hs-script-loader-pub... https://api.hubapi.com/hs-script-loader-public/v2/config/pixels-and-events/json?portalId=24421275 — 200 — 1.1 KiB — 181 ms — h2https://www.googletagmanager.com/gtag/js?id=AW-17012445944www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=AW-17012445944 — 200 — 145.7 KiB — 90 ms — h2https://www.googletagmanager.com/gtag/js?id=AW-17012445944&cx=c&gtm=4e69g1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=AW-17012445944&cx=c&gtm=4e69g1 — 200 — 145.7 KiB — 127 ms — h2https://pagead2.googlesyndication.com/ccm/collect?rcb=3&frm=0&apvc=1&tid=AW-17012445944&en=page_view&dl=https%3A%2F%2Fwww.jcl.energy%2F&scrsrc=www.googletagmanager.com&rnd=907561549.1789959974&navt=n&npa=0&did=dZTQ1Zm&gdid=dZTQ1Zm&gtm=45be69g1za200zb868364516zd868364516xecxf1&gcs=G101&gcd=13p3t3l3l5l1&dma=0&tag_exp=115938466~115938469~118897920~118897930~120385423~120469145~120469153&tft=1789959974350&tfd=1654&tids=AW-17012445944&fmt=8pagead2.googlesyndication.com/ccm/c... https://pagead2.googlesyndication.com/ccm/collect?rcb=3&frm=0&apvc=1&tid=AW-17012445944&en=page_view&dl=https%3A%2F%2Fwww.jcl.energy%2F&scrsrc=www.googletagmanager.com&rnd=907561549.1789959974&navt=n&npa=0&did=dZTQ1Zm&gdid=dZTQ1Zm&gtm=45be69g1za200zb868364516zd868364516xecxf1&gcs=G101&gcd=13p3t3l3l5l1&dma=0&tag_exp=115938466~115938469~118897920~118897930~120385423~120469145~120469153&tft=1789959974350&tfd=1654&tids=AW-17012445944&fmt=8 — 200 — 21 B — 70 ms — 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HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
49% of JavaScript execution is third-party
First-party Third-party 1590ms · 457KB · €17/mo
edge.fullstory.com
Other
Costly
Execution 538ms
Transfer 80 KB
Unused 38%
Monthly Cost €6/mo
HubSpot Analytics
Analytics
Costly
Execution 518ms
Transfer 43 KB
Monthly Cost €6/mo
Google Tag Manager
Tag Manager
Costly
Execution 304ms
Transfer 162 KB
Unused 42%
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Optional
Execution 162ms
Transfer 146 KB
Unused 47%
Monthly Cost €2/mo
js.hscollectedforms.net
Other
Optional
Execution 69ms
Transfer 27 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • edge.fullstory.com adds 538ms and costs ~€6/month
  • HubSpot Analytics adds 518ms and costs ~€6/month
  • Google Tag Manager adds 304ms and costs ~€3/month

49% 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

edge.fullstory.com takes 538ms 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

HubSpot Analytics takes 518ms 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

Google Tag Manager takes 304ms 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 (2026-08-23 — 2026-09-19)

LCP (p75)

2602 ms

72% good

INP (p75)

0 ms

0% good

CLS (p75)

0.000

100% good

FCP (p75)

1607 ms

TTFB (p75)

0 ms

Image Optimization
15 images, 501 KB total, 363 KB wasted
INFO

Image Optimization Audit

Total Images

15

Total Size

501 KB

Oversized

3

Wasted

363 KB

4 missing dimensions 7 missing lazy loading
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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