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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
68
GRADE
D
FIX
6
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
36
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
88
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
67
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.

2.80 s

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

26.76 s

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

3.04 s

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

0.064

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

5.35 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.

27.74 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
17
7 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
3.7 MB transferred, 161 requests
FIX
3.7 MB transferred, 161 requests
Warning::
Page weighs 10.7 MB (3.7 MB transferred)
Warning::
JavaScript is 2.6 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.6 MB
Info::
Fonts are 398 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 398 KB
Warning::
161 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.78 g CO2 per page load
3.7 MB / 2.4 MB budget
3.7 MB transferred
161 requests
0.78 g CO2 per page load
JavaScript 2.6 MiB 71%
Images 424.8 KiB 11%
Fonts 398.4 KiB 11%
Other 115.3 KiB 3%
HTML 70.9 KiB 2%
CSS 63.7 KiB 2%
Other 10.0 KiB 0%
Other 7.5 KiB 0%
0 2.4 MB 4.9 MB
Over budget

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

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

D
Third-Party Impact
Action
81% third-party, 0 ms blocking
FIX
81% third-party, 0 ms blocking
Warning::
Third-party code accounts for 81% of page weight (3.0 MiB of 3.7 MiB)
Info::
Third-party blocking time is low (0 ms)
19%
81%
First-party Third-party
F
JS Execution Cost
Action
8797ms total JS execution
FIX
8797ms total JS execution
Warning::
https://jmir.org/: 1418ms CPU time
Warning::
https://8b5f0effe65c.us-east-2.sdk.awswaf.com/8b5f...: 1238ms CPU time
Warning::
https://jmir.org/_nuxt/cceee7c.js: 1040ms CPU time
Warning::
Unattributable: 835ms CPU time
Warning::
https://js.hs-analytics.net/analytics/177688770000...: 711ms CPU time
Warning::
Third-party scripts: 6339ms (72% of total)

Main Thread Breakdown

Script Evaluation 60% Style & Layout 13% Other 11% Script Parsing & Compilation 10%
ScriptTotalScriptingParse/CompileParty
https://jmir.org/1418ms21ms32ms1st
https://8b5f0effe65c.us-east-2.sdk.awswaf.com/8b5f0effe65c/72fd6064c3cc/challenge.js1238ms996ms134ms3rd
https://jmir.org/_nuxt/cceee7c.js1040ms883ms3ms1st
Unattributable835ms57ms0ms3rd
https://js.hs-analytics.net/analytics/1776887700000/19668141.js711ms521ms40ms3rd
https://static.zdassets.com/web_widget/classic/latest/web-widget-main-22a6ed7.js644ms565ms70ms3rd
https://cdn.jsdelivr.net/npm/@iabtechlabtcf/core@1.5.20/+esm597ms514ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-MEVSCZYLY0&cx=c&gtm=4e64k0381ms333ms46ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-58BHBF4V337ms253ms80ms3rd
https://www.googletagmanager.com/gtag/js?id=G-YP0XNYBWWC&cx=c&gtm=4e64k0247ms200ms45ms3rd

Showing top 10 of 22 scripts

F
JS Bundles
Action
91 scripts, 677 KB unused
FIX
91 scripts, 677 KB unused
Warning::
https://static.zdassets.com/web_widget/classic/lat...: 111 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=AW-107...: 106 KB unused (73%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=UA-186...: 92 KB unused (74%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-YP0X...: 69 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-MEVS...: 68 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 677 KB
677 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://static.zdassets.com/web_widget/classic/latest/web-widget-main-22a6ed7.js261 KB111 KB (43%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-1071448537145 KB106 KB (73%)✓3rd
https://www.googletagmanager.com/gtag/js?id=UA-186918-1&cx=c&gtm=4e64k0125 KB92 KB (74%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-YP0XNYBWWC&cx=c&gtm=4e64k0171 KB69 KB (40%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-MEVSCZYLY0&cx=c&gtm=4e64k0175 KB68 KB (39%)✓3rd
https://www.googletagmanager.com/gtag/js?id=AW-1071448537&cx=c&gtm=4e64k0145 KB63 KB (44%)✓3rd
https://www.googletagmanager.com/gtag/js?id=UA-186918-1&l=dataLayer125 KB60 KB (48%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-58BHBF4V156 KB60 KB (38%)✓3rd
https://jmir.org/_nuxt/5b4af9a.js38 KB24 KB (64%)✓1st
https://badge.dimensions.ai/badge.js81 KB24 KB (29%)✗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

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

F
Page Weight Inventory
Action
161 resources · 3.7 MB · 677 KB savings available
FIX
161 resources · 3.7 MB · 677 KB savings available
Warning::
Page weight 2.7 MB over 1MB target
Got: 3.7 MB Expected: ≤ 1 MB
Info::
~677 KB of savings available
Warning::
109 third-party resources (81% of weight)
Info::
3 resources over 200KB
161 resources · 3.7 MiB · 109 third-party 2.7 MiB over 1MB target
JavaScript 71% · 2.6 MiB
Image 11% · 430.7 KiB
Font 11% · 398.4 KiB
Other 3% · 126.4 KiB
Document 2% · 71.4 KiB
CSS 2% · 63.7 KiB

~676.8 KiB of savings available

Remove unused JavaScript: 676.8 KiB
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.
Info::
ETag present — enables conditional (304) responses

No Cache-Control header

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

C
Image Optimization
Action
30 images, 0 KB saveable
REVIEW
30 images, 0 KB saveable
Warning::
https://asset.jmir.pub/resources/images/partners/c... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://asset.jmir.pub/resources/images/partners/o... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://asset.jmir.pub/placeholder.svg is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://asset.jmir.pub/resources/images/partners/o... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://asset.jmir.pub/resources/images/logos/JMIR... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://asset.jmir.pub/resources/images/partners/c... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://19668141.fs1.hubspotusercontent-na1.net/hu... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://asset.jmir.pub/resources/images/partners/t... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://asset.jmir.pub/resources/images/partners/O... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
30 images 425 KB
0 oversized -0 KB
23 legacy format
9 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

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

C
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
Info::
All text resources are compressed
All text resources are properly compressed.
A+
Font Loading
6 fonts (398 KB)
PASS
6 fonts (398 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

398 KB total

Render-blocking

0

of 6

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 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s FCP 2.8 s LCP 26.8 shttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 36.7 KiB — 36 ms — font-display: swaphttps://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/webfonts/fa-solid-900.woff2fa-solid-900.woff2 https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/webfonts/fa-solid-900.woff2 — 153.4 KiB — 172 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v51/KFO5CnqEu92Fr1Mu53ZEC9_Vu3r1gIhOszmkBnkaSTbQWg.woff2KFO5CnqEu92Fr1Mu53ZEC9_... https://fonts.gstatic.com/s/roboto/v51/KFO5CnqEu92Fr1Mu53ZEC9_Vu3r1gIhOszmkBnkaSTbQWg.woff2 — 40.8 KiB — 37 ms — font-display: swaphttps://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/webfonts/fa-brands-400.woff2fa-brands-400.woff2 https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/webfonts/fa-brands-400.woff2 — 115.7 KiB — 164 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMaxKUBHMdazTgWw.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMaxKUBHMdazTgWw.woff2 — 16.3 KiB — 25 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMawCUBHMdazTgWw.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMawCUBHMdazTgWw.woff2 — 35.5 KiB — 30 ms — font-display: swap
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 37 KB
Load time 36 ms
Start 602 ms
Risk FOUT — text flashes from fallback to web font
fa-solid-900.woff2 woff2 swap
Size 153 KB
Load time 172 ms
Start 603 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
KFO5CnqEu92Fr1Mu53ZEC9_... woff2 swap
Size 41 KB
Load time 37 ms
Start 637 ms
Risk FOUT — text flashes from fallback to web font
fa-brands-400.woff2 woff2 swap
Size 116 KB
Load time 164 ms
Start 637 ms
Risk FOUT — text flashes from fallback to web font
  • Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 16 KB
Load time 25 ms
Start 2.2 s
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 35 KB
Load time 30 ms
Start 2.3 s
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 ~135 KB and ~270 ms

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
51 hints, 0 missing preconnects
PASS
51 hints, 0 missing preconnects
Info::
Page uses 51 resource hint(s)

Current Resource Hints

preconnect
1
preload
+40
50
dns-prefetch
—
prefetch
—

51 resource hints configured

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
Network Waterfall
161 requests over 3897ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s 22.0 s 24.0 s 26.0 s 28.0 s FCP 2.8 s LCP 26.8 shttps://jmir.org// https://jmir.org/ — 200 — 70.9 KiB — 656 ms — h2https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.3.1/css/bootstrap-grid.min.csscdnjs.cloudflare.com/ajax/libs/twit... https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.3.1/css/bootstrap-grid.min.css — 200 — 3.5 KiB — 103 ms — h3https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/css/all.min.csscdnjs.cloudflare.com/ajax/libs/font... https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.5.2/css/all.min.css — 200 — 19.1 KiB — 103 ms — h3https://fonts.googleapis.com/css?family=Roboto:100,100i,300,300i,400,400i,500,500i,700,700i,900,900i&display=swapfonts.googleapis.com/css?family=Rob... https://fonts.googleapis.com/css?family=Roboto:100,100i,300,300i,400,400i,500,500i,700,700i,900,900i&display=swap — 200 — 2.9 KiB — 96 ms — h2https://js.hs-scripts.com/19668141.jsjs.hs-scripts.com/19668141.js https://js.hs-scripts.com/19668141.js — 200 — 1.1 KiB — 128 ms — h2https://jmir.org/_nuxt/1b4a705.js/_nuxt/1b4a705.js https://jmir.org/_nuxt/1b4a705.js — 200 — 1.7 KiB — 495 ms — h2https://jmir.org/_nuxt/1efb175.js/_nuxt/1efb175.js https://jmir.org/_nuxt/1efb175.js — 200 — 4.8 KiB — 216 ms — h2https://jmir.org/_nuxt/cf78d0f.js/_nuxt/cf78d0f.js https://jmir.org/_nuxt/cf78d0f.js — 200 — 6.6 KiB — 494 ms — h2https://jmir.org/_nuxt/72e1dbd.js/_nuxt/72e1dbd.js https://jmir.org/_nuxt/72e1dbd.js — 200 — 4.8 KiB — 493 ms — h2https://jmir.org/_nuxt/550286b.js/_nuxt/550286b.js https://jmir.org/_nuxt/550286b.js — 200 — 5.4 KiB — 214 ms — h2https://jmir.org/_nuxt/6391f5c.js/_nuxt/6391f5c.js https://jmir.org/_nuxt/6391f5c.js — 200 — 4.5 KiB — 349 ms — h2https://jmir.org/_nuxt/81fa463.js/_nuxt/81fa463.js https://jmir.org/_nuxt/81fa463.js — 200 — 3.9 KiB — 494 ms — h2https://jmir.org/_nuxt/a94e33f.js/_nuxt/a94e33f.js https://jmir.org/_nuxt/a94e33f.js — 200 — 3.5 KiB — 493 ms — h2https://jmir.org/_nuxt/d2e9970.js/_nuxt/d2e9970.js https://jmir.org/_nuxt/d2e9970.js — 200 — 3.5 KiB — 217 ms — h2https://jmir.org/_nuxt/5a8766b.js/_nuxt/5a8766b.js https://jmir.org/_nuxt/5a8766b.js — 200 — 6.5 KiB — 492 ms — h2https://jmir.org/_nuxt/9462757.js/_nuxt/9462757.js https://jmir.org/_nuxt/9462757.js — 200 — 3.7 KiB — 493 ms — h2https://jmir.org/_nuxt/1c2693e.js/_nuxt/1c2693e.js https://jmir.org/_nuxt/1c2693e.js — 200 — 5.7 KiB — 493 ms — h2https://jmir.org/_nuxt/16f5249.js/_nuxt/16f5249.js https://jmir.org/_nuxt/16f5249.js — 200 — 9.2 KiB — 493 ms — h2https://jmir.org/_nuxt/40dedc9.js/_nuxt/40dedc9.js https://jmir.org/_nuxt/40dedc9.js — 200 — 22.7 KiB — 491 ms — h2https://jmir.org/_nuxt/c71bb12.js/_nuxt/c71bb12.js https://jmir.org/_nuxt/c71bb12.js — 200 — 5.8 KiB — 491 ms — h2https://jmir.org/_nuxt/46039b8.js/_nuxt/46039b8.js https://jmir.org/_nuxt/46039b8.js — 200 — 6.9 KiB — 490 ms — h2https://jmir.org/_nuxt/0f43598.js/_nuxt/0f43598.js https://jmir.org/_nuxt/0f43598.js — 200 — 10.9 KiB — 496 ms — h2https://jmir.org/_nuxt/7a95852.js/_nuxt/7a95852.js https://jmir.org/_nuxt/7a95852.js — 200 — 5.5 KiB — 498 ms — h2https://jmir.org/_nuxt/acc964e.js/_nuxt/acc964e.js https://jmir.org/_nuxt/acc964e.js — 200 — 22.2 KiB — 501 ms — h2https://jmir.org/_nuxt/5b4af9a.js/_nuxt/5b4af9a.js https://jmir.org/_nuxt/5b4af9a.js — 200 — 37.6 KiB — 500 ms — h2https://jmir.org/_nuxt/3b52c5e.js/_nuxt/3b52c5e.js https://jmir.org/_nuxt/3b52c5e.js — 200 — 12.8 KiB — 502 ms — h2https://jmir.org/_nuxt/d225d4e.js/_nuxt/d225d4e.js https://jmir.org/_nuxt/d225d4e.js — 200 — 6.1 KiB — 495 ms — h2https://jmir.org/_nuxt/5aba1f9.js/_nuxt/5aba1f9.js https://jmir.org/_nuxt/5aba1f9.js — 200 — 3.4 KiB — 496 ms — h2https://jmir.org/_nuxt/bab07cb.js/_nuxt/bab07cb.js https://jmir.org/_nuxt/bab07cb.js — 200 — 12.5 KiB — 502 ms — h2https://jmir.org/_nuxt/90f100e.js/_nuxt/90f100e.js https://jmir.org/_nuxt/90f100e.js — 200 — 10.8 KiB — 502 ms — h2
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h2https://d1uo4w7k31k5mn.cloudfront.net/v2_hq/1.pngd1uo4w7k31k5mn.cloudfront.net/v2_hq... https://d1uo4w7k31k5mn.cloudfront.net/v2_hq/1.png — 200 — 2.1 KiB — 95 ms — h2https://d1uo4w7k31k5mn.cloudfront.net/v2_hq/22.pngd1uo4w7k31k5mn.cloudfront.net/v2_hq... https://d1uo4w7k31k5mn.cloudfront.net/v2_hq/22.png — 200 — 2.2 KiB — 85 ms — h2https://d1uo4w7k31k5mn.cloudfront.net/v2_hq/17.pngd1uo4w7k31k5mn.cloudfront.net/v2_hq... https://d1uo4w7k31k5mn.cloudfront.net/v2_hq/17.png — 200 — 2.2 KiB — 72 ms — h2https://static.zdassets.com/web_widget/classic/latest/web-widget-main-22a6ed7.jsstatic.zdassets.com/web_widget/clas... https://static.zdassets.com/web_widget/classic/latest/web-widget-main-22a6ed7.js — 200 — 261.0 KiB — 32 ms — h2https://static.zdassets.com/web_widget/classic/latest/web-widget-locales/classic/en-us-json-22a6ed7.jsstatic.zdassets.com/web_widget/clas... https://static.zdassets.com/web_widget/classic/latest/web-widget-locales/classic/en-us-json-22a6ed7.js — 200 — 5.8 KiB — 18 ms — h2https://jmir.zendesk.com/embeddable/configjmir.zendesk.com/embeddable/config https://jmir.zendesk.com/embeddable/config — 200 — 1.4 KiB — 88 ms — h2https://track.hubspot.com/__ptq.gif?k=1&sd=412x823&cd=24-bit&cs=UTF-8&ln=en-us&bfp=683dd27c32696f16ae9d34e26d0bbf7f&v=1.1&a=19668141&pu=https%3A%2F%2Fjmir.org%2F&t=Journal+of+Medical+Internet+Research&cts=1776887955931&vi=2b6eda42297fba8f5d1f8c4d1ce4f4ab&nc=true&cc=15track.hubspot.com/__ptq.gif?k=1&sd=... https://track.hubspot.com/__ptq.gif?k=1&sd=412x823&cd=24-bit&cs=UTF-8&ln=en-us&bfp=683dd27c32696f16ae9d34e26d0bbf7f&v=1.1&a=19668141&pu=https%3A%2F%2Fjmir.org%2F&t=Journal+of+Medical+Internet+Research&cts=1776887955931&vi=2b6eda42297fba8f5d1f8c4d1ce4f4ab&nc=true&cc=15 — 200 — 1.1 KiB — 200 ms — h2https://8b5f0effe65c.9270f73c.us-east-2.token.awswaf.com/8b5f0effe65c/72fd6064c3cc/telemetry8b5f0effe65c.9270f73c.us-east-2.tok... https://8b5f0effe65c.9270f73c.us-east-2.token.awswaf.com/8b5f0effe65c/72fd6064c3cc/telemetry — 200 — 1.2 KiB — 117 ms — h3https://asset.jmir.pub/assets/static/images/favicon-32x32.pngasset.jmir.pub/assets/static/images... https://asset.jmir.pub/assets/static/images/favicon-32x32.png — 200 — 3.6 KiB — 19 ms — h2https://8b5f0effe65c.9270f73c.us-east-2.token.awswaf.com/8b5f0effe65c/72fd6064c3cc/telemetry8b5f0effe65c.9270f73c.us-east-2.tok... https://8b5f0effe65c.9270f73c.us-east-2.token.awswaf.com/8b5f0effe65c/72fd6064c3cc/telemetry — 200 — 1.2 KiB — 119 ms — h3
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 6339ms · 1692KB · €69/mo
8b5f0effe65c.us-east-2.sdk.awswaf.com
Other
Costly
Execution 1238ms
Transfer 0 KB
Monthly Cost €13/mo
Unattributable
Other
Costly
Execution 835ms
Transfer 0 KB
Monthly Cost €9/mo
HubSpot Analytics
Analytics
Costly
Execution 711ms
Transfer 43 KB
Monthly Cost €8/mo
Zendesk Widget
Customer Support
Costly
Execution 644ms
Transfer 261 KB
Unused 43%
Monthly Cost €7/mo
jsDelivr
CDN
Costly
Execution 597ms
Transfer 10 KB
Monthly Cost €6/mo
Google Tag Manager
Tag Manager
Costly
Execution 381ms
Transfer 175 KB
Unused 39%
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Costly
Execution 337ms
Transfer 156 KB
Unused 38%
Monthly Cost €4/mo
Google Tag Manager
Tag Manager
Costly
Execution 247ms
Transfer 171 KB
Unused 40%
Monthly Cost €3/mo
app.enzuzo.com
Other
Costly
Execution 202ms
Transfer 131 KB
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 191ms
Transfer 125 KB
Unused 48%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 169ms
Transfer 145 KB
Unused 44%
Monthly Cost €2/mo
Zendesk Widget
Customer Support
Optional
Execution 149ms
Transfer 6 KB
Monthly Cost €2/mo
js.hscollectedforms.net
Other
Optional
Execution 121ms
Transfer 26 KB
Monthly Cost €1/mo
Twitter/X Pixel
Advertising
Optional
Execution 101ms
Transfer 13 KB
Monthly Cost €1/mo
badge.dimensions.ai
Other
Optional
Execution 95ms
Transfer 81 KB
Unused 29%
Monthly Cost €1/mo
LinkedIn Insight
Advertising
Optional
Execution 89ms
Transfer 19 KB
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 62ms
Transfer 125 KB
Unused 74%
Monthly Cost €1/mo
js.hubspot.com
Other
Optional
Execution 58ms
Transfer 28 KB
Monthly Cost €1/mo
embed.altmetric.com
Other
Optional
Execution 57ms
Transfer 31 KB
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 55ms
Transfer 145 KB
Unused 73%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • 8b5f0effe65c.us-east-2.sdk.awswaf.com adds 1238ms and costs ~€13/month
  • Unattributable adds 835ms and costs ~€9/month
  • HubSpot Analytics adds 711ms and costs ~€8/month
  • Zendesk Widget adds 644ms and costs ~€7/month
  • jsDelivr adds 597ms and costs ~€6/month
  • Google Tag Manager adds 381ms and costs ~€4/month
  • Google Tag Manager adds 337ms and costs ~€4/month
  • Google Tag Manager adds 247ms and costs ~€3/month
  • app.enzuzo.com adds 202ms and costs ~€2/month

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

8b5f0effe65c.us-east-2.sdk.awswaf.com takes 1238ms 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

Unattributable takes 835ms 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 711ms 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

Zendesk Widget takes 644ms 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

jsDelivr takes 597ms 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 381ms 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 337ms 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 247ms 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

app.enzuzo.com takes 202ms 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

74% of Google Tag Manager'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

73% of Google Tag Manager'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

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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