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https://he.net

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
87
GRADE
B
FIX
1
REVIEW
5
PASS
7
INFO
2

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

Mobile Desktop
96
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
66
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
83
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.

619 ms

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

1.28 s

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

0 ms

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

0.059

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

730 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.

1.28 s

Page Load Progression

496 ms
991 ms
1.5 s
2.0 s
2.5 s
3.0 s
3.5 s
4.0 s
Checks
15
7 PASS 5 REVIEW 1 FIX
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.

C
Page Weight Budget
Action
1.9 MB transferred, 10 requests
REVIEW
1.9 MB transferred, 10 requests
Info::
Page weighs 2.1 MB (1.9 MB transferred)
Warning::
Images are 1.7 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 1.7 MB
Info::
10 HTTP requests
Info::
Estimated 0.39 g CO2 per page load
1.9 MB / 2.4 MB budget
1.9 MB transferred
10 requests
0.39 g CO2 per page load
Images 1.7 MiB 91%
JavaScript 155.1 KiB 8%
HTML 5.7 KiB 0%
Other 1.5 KiB 0%
Other 21 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

C
Image Optimization
Action
5 images, 0 KB saveable
REVIEW
5 images, 0 KB saveable
Warning::
https://he.net/images/helogo.gif is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://he.net/images/homepage-smallmap.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://he.net/3d-map/images/3d-map-thumbnail-170p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://he.net/images/homepage-smallcert.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://he.net/images/homepage-smallcolo.png is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
5 images 1.7 MB
0 oversized -0 KB
5 legacy format
5 missing dimensions CLS risk

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

Set explicit width and height to prevent CLS.

Why this matters

Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.

Source: web.dev / Core Web Vitals

B
JS Bundles
2 scripts, 59 KB unused
REVIEW
2 scripts, 59 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=AW-106...: 59 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 59 KB
59 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=AW-1068215855138 KB59 KB (43%)✓3rd
https://ssl.google-analytics.com/ga.js17 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

C
Page Weight Inventory
Action
10 resources · 1.9 MB · 59 KB savings available
REVIEW
10 resources · 1.9 MB · 59 KB savings available
Warning::
Page weight 873 KB over 1MB target
Got: 1.9 MB Expected: ≤ 1 MB
Info::
~59 KB of savings available
Info::
3 third-party resources (8% of weight)
Info::
1 resources over 200KB
10 resources · 1.9 MiB · 3 third-party 873.4 KiB over 1MB target
Image 92% · 1.7 MiB
JavaScript 8% · 155.1 KiB
Document 0% · 5.7 KiB
Other 0% · 21 B

~59.3 KiB of savings available

Remove unused JavaScript: 59.3 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Third-Party Impact
8% third-party, 0 ms blocking
PASS
8% third-party, 0 ms blocking
Info::
Third-party code accounts for 8% of page weight (155.1 KiB of 1.9 MiB)
Info::
Third-party blocking time is low (0 ms)
92%
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+
JS Execution Cost
219ms total JS execution
PASS
219ms total JS execution
Info::
https://www.googletagmanager.com/gtag/js?id=AW-106...: 84ms CPU time
Info::
Unattributable: 74ms CPU time
Info::
https://he.net/: 61ms CPU time
Warning::
Third-party scripts: 158ms (72% of total)

Main Thread Breakdown

Script Evaluation 37% Other 35% Style & Layout 11% Script Parsing & Compilation 9% Rendering 6%
ScriptTotalScriptingParse/CompileParty
https://www.googletagmanager.com/gtag/js?id=AW-106821585584ms67ms15ms3rd
Unattributable74ms4ms0ms3rd
https://he.net/61ms7ms2ms1st
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+
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
Network Waterfall
10 requests over 1665ms
INFO
0 ms 500 ms 1.0 s 1.5 s FCP 619 ms LCP 1.3 shttps://he.net// https://he.net/ — 200 — 5.7 KiB — 417 ms — http/1.1https://www.googletagmanager.com/gtag/js?id=AW-1068215855www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=AW-1068215855 — 200 — 137.7 KiB — 41 ms — h2https://he.net/images/helogo.gif/images/helogo.gif https://he.net/images/helogo.gif — 200 — 4.5 KiB — 140 ms — http/1.1https://he.net/images/homepage-smallmap.png/images/homepage-smallmap.png https://he.net/images/homepage-smallmap.png — 200 — 31.4 KiB — 271 ms — http/1.1https://he.net/3d-map/images/3d-map-thumbnail-170px.gif/3d-map/images/3d-map-thumbnail-170... https://he.net/3d-map/images/3d-map-thumbnail-170px.gif — 200 — 1.6 MiB — 1.1 s — http/1.1https://he.net/images/homepage-smallcert.png/images/homepage-smallcert.png https://he.net/images/homepage-smallcert.png — 200 — 40.5 KiB — 529 ms — http/1.1https://he.net/images/homepage-smallcolo.png/images/homepage-smallcolo.png https://he.net/images/homepage-smallcolo.png — 200 — 47.7 KiB — 663 ms — http/1.1https://ssl.google-analytics.com/ga.jsssl.google-analytics.com/ga.js https://ssl.google-analytics.com/ga.js — 200 — 17.4 KiB — 14 ms — h2https://www.google.com/ccm/collect?rcb=15&frm=0&en=page_view&dl=https%3A%2F%2Fhe.net%2F&scrsrc=www.googletagmanager.com&rnd=802644974.1776902036&dt=Hurricane%20Electric%20Internet%20Services%20-%20Internet%20Backbone%20and%20Colocation%20Provider&auid=1332066049.1776902036&navt=n&npa=1&gtm=45be64k1v898168298za200zd898168298xec&gcd=13l3l3l2l1l1&dma_cps=a&dma=1&tag_exp=0~115616985~115938466~115938469~117266401&apve=1&apvf=f&apvc=1&tids=AW-1068215855&tid=AW-1068215855&tft=1776902035706&tfd=576www.google.com/ccm/collect?rcb=15&f... https://www.google.com/ccm/collect?rcb=15&frm=0&en=page_view&dl=https%3A%2F%2Fhe.net%2F&scrsrc=www.googletagmanager.com&rnd=802644974.1776902036&dt=Hurricane%20Electric%20Internet%20Services%20-%20Internet%20Backbone%20and%20Colocation%20Provider&auid=1332066049.1776902036&navt=n&npa=1&gtm=45be64k1v898168298za200zd898168298xec&gcd=13l3l3l2l1l1&dma_cps=a&dma=1&tag_exp=0~115616985~115938466~115938469~117266401&apve=1&apvf=f&apvc=1&tids=AW-1068215855&tid=AW-1068215855&tft=1776902035706&tfd=576 — 200 — 21 B — 21 ms — h3https://he.net/favicon.ico/favicon.ico https://he.net/favicon.ico — 200 — 1.5 KiB — 138 ms — http/1.1
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
72% of JavaScript execution is third-party
First-party Third-party 158ms · 138KB · €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 84ms
Transfer 138 KB
Unused 43%
Monthly Cost €1/mo
Unattributable
Other
Optional
Execution 74ms
Transfer 0 KB
Monthly Cost €1/mo

72% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.

Why this matters

When third-party JS execution time exceeds your own, performance gains from frontend work are capped by code you don't own.

Learn more ▾

Every millisecond of third-party JS competes with your own for main-thread time. If their share is bigger than yours, optimization on your code base barely moves the needle. Audit, defer, or remove third-parties before further frontend optimization. Use Lighthouse's third-party audit to identify the worst offenders.

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.

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