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https://physiology.org

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
67
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.
80
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
88
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
100
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.

5.16 s

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

13.35 s

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

1.21 s

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

0.018

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

6.51 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.

24.34 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
7.0 MB transferred, 115 requests
FIX
7.0 MB transferred, 115 requests
Critical::
Page weighs 11.0 MB (7.0 MB transferred)
Warning::
Images are 4.9 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 4.9 MB
Warning::
JavaScript is 1.8 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.8 MB
Warning::
115 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 1.5 g CO2 per page load
7.0 MB / 2.4 MB budget
7.0 MB transferred
115 requests
1.5 g CO2 per page load
Images 4.9 MiB 69%
JavaScript 1.8 MiB 26%
Fonts 160.3 KiB 2%
Other 95.8 KiB 1%
CSS 51.7 KiB 1%
HTML 17.4 KiB 0%
Other 12.1 KiB 0%
Other 10.3 KiB 0%
Other 561 B 0%
Other 0 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

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
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (7.0 MiB of 7.0 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
4483ms total JS execution
FIX
4483ms total JS execution
Warning::
Unattributable: 608ms CPU time
Warning::
https://www.physiology.org/?SSO=Y: 564ms CPU time
Warning::
https://code.jquery.com/jquery-3.7.1.min.js: 391ms CPU time
Warning::
https://www.physiology.org/ResourcePackages/APS/as...: 293ms CPU time
Warning::
https://script.crazyegg.com/pages/versioned/common...: 291ms CPU time
Warning::
Third-party scripts: 4483ms (100% of total)

Main Thread Breakdown

Script Evaluation 57% Other 16% Style & Layout 13% Script Parsing & Compilation 9%
ScriptTotalScriptingParse/CompileParty
Unattributable608ms13ms0ms3rd
https://www.physiology.org/?SSO=Y564ms44ms4ms3rd
https://code.jquery.com/jquery-3.7.1.min.js391ms224ms6ms3rd
https://www.physiology.org/ResourcePackages/APS/assets/scripts/skrollr.min.js293ms105ms2ms3rd
https://script.crazyegg.com/pages/versioned/commontransformations-scripts/df706026807a27b189c4eeedc429ebbf.js291ms260ms14ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-TB3ZPRK276ms228ms35ms3rd
https://www.googletagmanager.com/gtag/js?id=G-L6BSPLN5JH253ms213ms39ms3rd
https://www.googletagmanager.com/gtag/js?id=G-70HB0WWZEK&cx=c&gtm=4e64h1246ms202ms42ms3rd
https://www.googletagmanager.com/gtag/js?id=G-PQ4M2JG8XQ&cx=c&gtm=4e64h1232ms187ms44ms3rd
https://www.googletagmanager.com/gtag/js?id=G-JNGKZ7FE80&cx=c&gtm=4e64h1226ms189ms36ms3rd

Showing top 10 of 19 scripts

F
JS Bundles
Action
33 scripts, 704 KB unused
FIX
33 scripts, 704 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-L6BS...: 116 KB unused (65%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-MEZB...: 72 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-L6BS...: 70 KB unused (39%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-2XWC...: 67 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-M5KQ...: 67 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 704 KB
704 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-L6BSPLN5JH&cx=c&gtm=4e64h1178 KB116 KB (65%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-MEZBQL4HVQ&cx=c&gtm=4e64h1173 KB72 KB (42%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-L6BSPLN5JH179 KB70 KB (39%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-2XWCGG40TY&cx=c&gtm=4e64h1157 KB67 KB (43%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-M5KQQHZ4D6&cx=c&gtm=4e64h1157 KB67 KB (42%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-70HB0WWZEK&cx=c&gtm=4e64h1157 KB66 KB (42%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-JNGKZ7FE80&cx=c&gtm=4e64h1157 KB66 KB (42%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-PQ4M2JG8XQ&cx=c&gtm=4e64h1160 KB66 KB (41%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-TB3ZPRK149 KB58 KB (39%)✓3rd
https://script.crazyegg.com/pages/versioned/commontransformations-scripts/df706026807a27b189c4eeedc429ebbf.js72 KB35 KB (49%)✓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
115 resources · 7.0 MB · 704 KB savings available
FIX
115 resources · 7.0 MB · 704 KB savings available
Warning::
Page weight 6.0 MB over 1MB target
Got: 7.0 MB Expected: ≤ 1 MB
Info::
~704 KB of savings available
Warning::
114 third-party resources (100% of weight)
Info::
7 resources over 200KB
115 resources · 7.0 MiB · 114 third-party 6.0 MiB over 1MB target
Image 70% · 4.9 MiB
JavaScript 26% · 1.8 MiB
Font 2% · 160.3 KiB
CSS 2% · 145.9 KiB
Document 0% · 21.3 KiB
Other 0% · 14.7 KiB

~704.4 KiB of savings available

Remove unused JavaScript: 704.4 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.

No Cache-Control header

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

C
Image Optimization
Action
40 images, 0 KB saveable
REVIEW
40 images, 0 KB saveable
Warning::
https://www.physiology.org/images/default-source/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/a... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.physiology.org/images/default-source/p... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
40 images 4.9 MB
0 oversized -0 KB
39 legacy format
26 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

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

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
5 fonts (160 KB)
PASS
5 fonts (160 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

160 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 12.0 s 14.0 s FCP 5.2 s LCP 13.3 shttps://use.fontawesome.com/releases/v5.5.0/webfonts/fa-solid-900.woff2fa-solid-900.woff2 https://use.fontawesome.com/releases/v5.5.0/webfonts/fa-solid-900.woff2 — 72.5 KiB — 44 ms — font-display: swaphttps://fonts.gstatic.com/s/nunitosans/v19/pe0TMImSLYBIv1o4X1M8ce2xCx3yop4tQpF_MeTm0lfGWVpNn64CL7U8upHZIbMV51Q42ptCp7t1R-tQKr51.woff2pe0TMImSLYBIv1o4X1M8ce2... https://fonts.gstatic.com/s/nunitosans/v19/pe0TMImSLYBIv1o4X1M8ce2xCx3yop4tQpF_MeTm0lfGWVpNn64CL7U8upHZIbMV51Q42ptCp7t1R-tQKr51.woff2 — 30.3 KiB — 46 ms — font-display: swaphttps://fonts.gstatic.com/s/nunitosans/v19/pe0RMImSLYBIv1o4X1M8cce4OdVisMz5nZRqy6cmmmU3t2FQWEAEOvV9wNvrwlNstMKW3Y6K5WMwd-laLZx3lE4.woff2pe0RMImSLYBIv1o4X1M8cce... https://fonts.gstatic.com/s/nunitosans/v19/pe0RMImSLYBIv1o4X1M8cce4OdVisMz5nZRqy6cmmmU3t2FQWEAEOvV9wNvrwlNstMKW3Y6K5WMwd-laLZx3lE4.woff2 — 32.2 KiB — 57 ms — font-display: swaphttps://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-0.woff2pro-fa-solid-900-0.woff2 https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-0.woff2 — 11.8 KiB — 35 ms — font-display: swaphttps://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-13.woff2pro-fa-solid-900-13.woff2 https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-13.woff2 — 13.5 KiB — 31 ms — font-display: swap
fa-solid-900.woff2 woff2 swap
Size 73 KB
Load time 44 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
pe0TMImSLYBIv1o4X1M8ce2... woff2 swap
Size 30 KB
Load time 46 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
pe0RMImSLYBIv1o4X1M8cce... woff2 swap
Size 32 KB
Load time 57 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
pro-fa-solid-900-0.woff2 woff2 swap
Size 12 KB
Load time 35 ms
Start 1.9 s
Risk FOUT — text flashes from fallback to web font
pro-fa-solid-900-13.woff2 woff2 swap
Size 13 KB
Load time 31 ms
Start 1.9 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)
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+
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
115 requests over 3081ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s FCP 5.2 s LCP 13.3 shttps://physiology.org// https://physiology.org/ — 301 — 88 B — 300 ms — h2https://www.physiology.org/www.physiology.org/ https://www.physiology.org/ — 302 — 272 B — 177 ms — h2https://ebus.physiology.org/SSO/?vi=12&vt=8d52502f590cfab3500ec4891e1708804b7c3527027a55a20c812a221398772ab563ba1cda205b207e6b23c6a5e1a9cb85e9ad871b3451f4f8bb998037f687b7&DPLF=Yebus.physiology.org/SSO/?vi=12&vt=8... https://ebus.physiology.org/SSO/?vi=12&vt=8d52502f590cfab3500ec4891e1708804b7c3527027a55a20c812a221398772ab563ba1cda205b207e6b23c6a5e1a9cb85e9ad871b3451f4f8bb998037f687b7&DPLF=Y — 302 — 1.5 KiB — 380 ms — h2https://ebus.physiology.org/SSO/Login.aspx?vi=12&vt=893d97f62523fd5bfb348b67d08b1f852aecb9a3a64c22d18986a3b545b27abb3bc895c51a113e0fa70cb97b1567e46d70d2d13de1c6e2dd6f23c858d34eb401ffded1f02c1634605d503191789b6a306a48f27b99cfeb6a3f409d26e62b991ec4b9b0c4f40aaecc1eb038f8ada8ded7d131ffcc06cd4df883b466f67108a73eace3689712e377874a42daee375b61414b2d5b7f9d03646d33263a19d50ba11571bc7af1a300ca9de231422e95d990a920ff36d79eb5737f18a6132fe5c3c24df65da462882a996df20ccf13ddcb85c0a9309c7b38b0b865e8f26b66e6c8b4bc7c75d9d3b43d16f8b52ccecf7494fe77&DPLF=Yebus.physiology.org/SSO/Login.aspx?... 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https://region1.google-analytics.com/g/collect?v=2&tid=G-M5KQQHZ4D6&gtm=45je64h1v9202484004z8811875412za20gzb811875412zd811875412&_p=1776813829512&gcs=G111&gcd=13n3n3n2n5l1&npa=0&dma_cps=a&dma=1&are=1&cid=211544022.1776813830&frm=0&pscdl=noapi&rcb=11&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%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=0~115616985~115938465~115938468~117266401~117512542&sid=1776813830&sct=1&seg=0&dl=https%3A%2F%2Fwww.physiology.org%2F%3FSSO%3DY&dt=American%20Physiological%20Society%20%7C%20Advancing%20Scientific%20Discovery%20%7C%20American%20Physiological%20Society&_tu=CA&en=page_view&_fv=1&_ss=1&tfd=2634 — 204 — 20 B — 31 ms — h3https://script.crazyegg.com/pages/versioned/commontransformations-scripts/df706026807a27b189c4eeedc429ebbf.jsscript.crazyegg.com/pages/versioned... https://script.crazyegg.com/pages/versioned/commontransformations-scripts/df706026807a27b189c4eeedc429ebbf.js — 200 — 71.9 KiB — 59 ms — h3https://www.youtube.com/s/player/218d9d92/www-widgetapi.vflset/www-widgetapi.jswww.youtube.com/s/player/218d9d92/w... https://www.youtube.com/s/player/218d9d92/www-widgetapi.vflset/www-widgetapi.js — 200 — 10.6 KiB — 28 ms — h2https://apsoc.informz.net/web_trk/collector/?e=pv&url=https%3A%2F%2Fwww.physiology.org%2F%3FSSO%3DY&page=American%20Physiological%20Society%20%7C%20Advancing%20Scientific%20Discovery%20%7C%20American%20Physiological%20Society&tv=js-2.5.3&tna=infz&aid=F8646FCE-FDE6-4A98-A1AD-0DE18B3632C7&p=web&tz=UTC&lang=en-US&cs=UTF-8&f_pdf=1&f_qt=0&f_realp=0&f_wma=0&f_dir=0&f_fla=0&f_java=0&f_gears=0&f_ag=0&res=412x823&cd=24&cookie=1&eid=0529f28d-e3e2-43fd-84b8-d340db4808c7&dtm=1776813830481&vp=442x883&ds=442x6211&vid=1&sid=95b319a4-1af9-4e50-bd74-433efaceedb2&duid=89d7694b2a007339&fp=622856602apsoc.informz.net/web_trk/collector... https://apsoc.informz.net/web_trk/collector/?e=pv&url=https%3A%2F%2Fwww.physiology.org%2F%3FSSO%3DY&page=American%20Physiological%20Society%20%7C%20Advancing%20Scientific%20Discovery%20%7C%20American%20Physiological%20Society&tv=js-2.5.3&tna=infz&aid=F8646FCE-FDE6-4A98-A1AD-0DE18B3632C7&p=web&tz=UTC&lang=en-US&cs=UTF-8&f_pdf=1&f_qt=0&f_realp=0&f_wma=0&f_dir=0&f_fla=0&f_java=0&f_gears=0&f_ag=0&res=412x823&cd=24&cookie=1&eid=0529f28d-e3e2-43fd-84b8-d340db4808c7&dtm=1776813830481&vp=442x883&ds=442x6211&vid=1&sid=95b319a4-1af9-4e50-bd74-433efaceedb2&duid=89d7694b2a007339&fp=622856602 — 200 — 1.1 KiB — 300 ms — h2https://apsoc.informz.net/web_trk/collector/?e=pv&url=https%3A%2F%2Fwww.physiology.org%2F%3FSSO%3DY&page=American%20Physiological%20Society%20%7C%20Advancing%20Scientific%20Discovery%20%7C%20American%20Physiological%20Society&tv=js-2.5.3&tna=infz&aid=F8646FCE-FDE6-4A98-A1AD-0DE18B3632C7&p=web&tz=UTC&lang=en-US&cs=UTF-8&f_pdf=1&f_qt=0&f_realp=0&f_wma=0&f_dir=0&f_fla=0&f_java=0&f_gears=0&f_ag=0&res=412x823&cd=24&cookie=1&eid=0529f28d-e3e2-43fd-84b8-d340db4808c7&dtm=1776813830481&vp=442x883&ds=442x6211&vid=1&sid=95b319a4-1af9-4e50-bd74-433efaceedb2&duid=89d7694b2a007339&fp=622856602apsoc.informz.net/web_trk/collector... https://apsoc.informz.net/web_trk/collector/?e=pv&url=https%3A%2F%2Fwww.physiology.org%2F%3FSSO%3DY&page=American%20Physiological%20Society%20%7C%20Advancing%20Scientific%20Discovery%20%7C%20American%20Physiological%20Society&tv=js-2.5.3&tna=infz&aid=F8646FCE-FDE6-4A98-A1AD-0DE18B3632C7&p=web&tz=UTC&lang=en-US&cs=UTF-8&f_pdf=1&f_qt=0&f_realp=0&f_wma=0&f_dir=0&f_fla=0&f_java=0&f_gears=0&f_ag=0&res=412x823&cd=24&cookie=1&eid=0529f28d-e3e2-43fd-84b8-d340db4808c7&dtm=1776813830481&vp=442x883&ds=442x6211&vid=1&sid=95b319a4-1af9-4e50-bd74-433efaceedb2&duid=89d7694b2a007339&fp=622856602 — 200 — 1.1 KiB — 402 ms — h2https://match.adsrvr.org/track/cmf/generic?gdpr=0&ttd_passthrough=a_id%3D5b9ff69bf474f4202a87289b&ttd_pid=6fgi4r1&ttd_puid=69e80706fbdc3137807dd53d&ttd_tpi=1match.adsrvr.org/track/cmf/generic?... https://match.adsrvr.org/track/cmf/generic?gdpr=0&ttd_passthrough=a_id%3D5b9ff69bf474f4202a87289b&ttd_pid=6fgi4r1&ttd_puid=69e80706fbdc3137807dd53d&ttd_tpi=1 — 200 — 149 B — 144 ms — h2https://script.crazyegg.com/pages/data-scripts/0103/9167/sampling/www.physiology.org.json?t=1script.crazyegg.com/pages/data-scri... https://script.crazyegg.com/pages/data-scripts/0103/9167/sampling/www.physiology.org.json?t=1 — 200 — 394 B — 45 ms — h3https://tracking.crazyegg.com/clock?u=1039167&st=377511&t=1776813830600&tk=d7afba7527a00ed229ec6836369f3867tracking.crazyegg.com/clock?u=10391... https://tracking.crazyegg.com/clock?u=1039167&st=377511&t=1776813830600&tk=d7afba7527a00ed229ec6836369f3867 — 204 — 0 B — 159 ms — h2https://pagestates-tracking.crazyegg.com/healthcheckpagestates-tracking.crazyegg.com/he... https://pagestates-tracking.crazyegg.com/healthcheck — 200 — 462 B — 38 ms — h2https://assets-tracking.crazyegg.com/healthcheckassets-tracking.crazyegg.com/health... https://assets-tracking.crazyegg.com/healthcheck — 200 — 460 B — 48 ms — h2blob:https://www.physiology.org/f6f3d80c-4fe9-4d1a-aee5-7d941279bd46www.physiology.org/f6f3d80c-4fe9-4d... blob:https://www.physiology.org/f6f3d80c-4fe9-4d1a-aee5-7d941279bd46 — 200 — -1 B — 7 ms — blobhttps://www.physiology.org/ResourcePackages/APS/assets/images/favicon-32x32.pngwww.physiology.org/ResourcePackages... https://www.physiology.org/ResourcePackages/APS/assets/images/favicon-32x32.png — 200 — 6.0 KiB — 104 ms — h2https://tracking.crazyegg.com/clock?u=1039167&st=377511&t=1776813830600&tk=d7afba7527a00ed229ec6836369f3867tracking.crazyegg.com/clock?u=10391... https://tracking.crazyegg.com/clock?u=1039167&st=377511&t=1776813830600&tk=d7afba7527a00ed229ec6836369f3867 — 200 — 147 B — 60 ms — h2blob:https://www.physiology.org/9679b7d7-2b1a-4edf-a2cc-5da859649b28www.physiology.org/9679b7d7-2b1a-4e... blob:https://www.physiology.org/9679b7d7-2b1a-4edf-a2cc-5da859649b28 — -1 — 0 B — 0 ms — https://script.crazyegg.com/pages/versioned/tracking-scripts/158692313dc4b9f2e28d9e9025e38d6b.jsscript.crazyegg.com/pages/versioned... https://script.crazyegg.com/pages/versioned/tracking-scripts/158692313dc4b9f2e28d9e9025e38d6b.js — 200 — 22.6 KiB — 24 ms — h3
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 4483ms · 1736KB · €49/mo
Unattributable
Other
Costly
Execution 608ms
Transfer 0 KB
Monthly Cost €7/mo
www.physiology.org
Other
Costly
Execution 564ms
Transfer 17 KB
Monthly Cost €6/mo
code.jquery.com
Other
Costly
Execution 391ms
Transfer 30 KB
Monthly Cost €4/mo
www.physiology.org
Other
Costly
Execution 293ms
Transfer 12 KB
Monthly Cost €3/mo
script.crazyegg.com
Other
Costly
Execution 291ms
Transfer 72 KB
Unused 49%
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 276ms
Transfer 149 KB
Unused 39%
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 253ms
Transfer 179 KB
Unused 39%
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 246ms
Transfer 157 KB
Unused 42%
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 232ms
Transfer 160 KB
Unused 41%
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 226ms
Transfer 157 KB
Unused 42%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Costly
Execution 221ms
Transfer 173 KB
Unused 42%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Costly
Execution 203ms
Transfer 157 KB
Unused 43%
Monthly Cost €2/mo
Google Tag Manager
Tag Manager
Optional
Execution 196ms
Transfer 157 KB
Unused 42%
Monthly Cost €2/mo
kit.fontawesome.com
Other
Optional
Execution 118ms
Transfer 6 KB
Monthly Cost €1/mo
cdn.feathr.co
Other
Optional
Execution 90ms
Transfer 42 KB
Monthly Cost €1/mo
Google Analytics
Analytics
Optional
Execution 77ms
Transfer 21 KB
Monthly Cost €1/mo
www.physiology.org
Other
Optional
Execution 67ms
Transfer 41 KB
Unused 58%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 66ms
Transfer 178 KB
Unused 65%
Monthly Cost €1/mo
apsoc.informz.net
Other
Optional
Execution 65ms
Transfer 27 KB
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 608ms and costs ~€7/month
  • www.physiology.org adds 564ms and costs ~€6/month
  • code.jquery.com adds 391ms and costs ~€4/month
  • www.physiology.org adds 293ms and costs ~€3/month
  • script.crazyegg.com adds 291ms and costs ~€3/month
  • Google Tag Manager adds 276ms and costs ~€3/month
  • Google Tag Manager adds 253ms and costs ~€3/month
  • Google Tag Manager adds 246ms and costs ~€3/month
  • Google Tag Manager adds 232ms and costs ~€3/month
  • Google Tag Manager adds 226ms and costs ~€2/month
  • Google Tag Manager adds 221ms and costs ~€2/month
  • Google Tag Manager adds 203ms and costs ~€2/month

100% 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

Unattributable takes 608ms 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

www.physiology.org takes 564ms 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

code.jquery.com takes 391ms 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

www.physiology.org takes 293ms 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

script.crazyegg.com takes 291ms 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 276ms 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 253ms 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 246ms 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 232ms 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 226ms 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 221ms 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 203ms 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

58% of www.physiology.org'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

65% 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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