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Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
93
GRADE
A
FIX
3
REVIEW
5
PASS
5
INFO
2

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

Mobile Desktop
80
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
89
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
81
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.

1.50 s

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

2.27 s

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

131 ms

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

0.058

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

1.52 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.

2.27 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
15
5 PASS 5 REVIEW 3 FIX
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 (1.3 MiB of 1.3 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
76 resources · 1.3 MB · 234 KB savings available
FIX
76 resources · 1.3 MB · 234 KB savings available
Warning::
Page weight 355 KB over 1MB target
Got: 1.3 MB Expected: ≤ 1 MB
Info::
~234 KB of savings available
Warning::
75 third-party resources (100% of weight)
Info::
1 resources over 200KB
76 resources · 1.3 MiB · 75 third-party 355.0 KiB over 1MB target
JavaScript 37% · 513.7 KiB
Font 28% · 391.8 KiB
Image 24% · 328.4 KiB
CSS 9% · 118.7 KiB
Document 2% · 24.7 KiB
Other 0% · 1.7 KiB

~234.1 KiB of savings available

Remove unused JavaScript: 234.1 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.

B
Page Weight Budget
1.3 MB transferred, 76 requests
REVIEW
1.3 MB transferred, 76 requests
Info::
Page weighs 4.0 MB (1.3 MB transferred)
Warning::
JavaScript is 514 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 514 KB
Info::
Fonts are 392 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 392 KB
Info::
76 HTTP requests
Info::
Estimated 0.28 g CO2 per page load
1.3 MB / 2.4 MB budget
1.3 MB transferred
76 requests
0.28 g CO2 per page load
JavaScript 513.6 KiB 37%
Fonts 391.8 KiB 28%
Images 327.3 KiB 24%
CSS 118.7 KiB 9%
HTML 24.7 KiB 2%
Other 1.1 KiB 0%
Other 1.1 KiB 0%
Other 685 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Under 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

C
Image Optimization
Action
27 images, 0 KB saveable
REVIEW
27 images, 0 KB saveable
Warning::
https://www.acs.org/content/dam/acsorg/home/storie... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.acs.org/content/dam/acsorg/home/storie... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.acs.org/content/dam/acsorg/home/storie... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.acs.org/content/dam/acsorg/home/storie... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.acs.org/adobe/dynamicmedia/deliver/dm-... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.acs.org/content/dam/acsorg/150/assets/... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.acs.org/content/dam/acsorg/home/storie... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.acs.org/content/dam/acsorg/home/storie... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.acs.org/content/dam/acsorg/home/storie... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
27 images 327 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
JS Execution Cost
Action
1067ms total JS execution
REVIEW
1067ms total JS execution
Warning::
https://www.acs.org/: 272ms CPU time
Warning::
https://cmp.osano.com/16BPzAUFV1UoQ26HU/2eaa77d8-4...: 266ms CPU time
Info::
https://assets.adobedtm.com/822408db7b4a/f9e889f09...: 239ms CPU time
Info::
Unattributable: 161ms CPU time
Info::
https://assetscloud.acs.org/v2.0/acs-bootstrap/js/...: 65ms CPU time
Warning::
Third-party scripts: 1067ms (100% of total)

Main Thread Breakdown

Script Evaluation 46% Style & Layout 22% Other 21% Script Parsing & Compilation 4% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
https://www.acs.org/272ms15ms2ms3rd
https://cmp.osano.com/16BPzAUFV1UoQ26HU/2eaa77d8-4afc-4efc-b4ec-b1457425e528/osano.js266ms179ms9ms3rd
https://assets.adobedtm.com/822408db7b4a/f9e889f09bf1/launch-758c59e3763b.min.js239ms207ms20ms3rd
Unattributable161ms2ms0ms3rd
https://assetscloud.acs.org/v2.0/acs-bootstrap/js/dotorg.min.js65ms26ms3ms3rd
https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/components.lc-b6175fcee7a91b1591f7aa1daf7d7018-lc.min.js62ms32ms2ms3rd
C
JS Bundles
Action
32 scripts, 234 KB unused
REVIEW
32 scripts, 234 KB unused
Warning::
https://assets.adobedtm.com/822408db7b4a/f9e889f09...: 78 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://assets.adobedtm.com/822408db7b4a/f9e889f09...: 78 KB unused (42%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cd...: 34 KB unused (58%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://assetscloud.acs.org/v2.0/acs-bootstrap/js/...: 23 KB unused (45%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cmp.osano.com/16BPzAUFV1UoQ26HU/2eaa77d8-4...: 21 KB unused (31%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 234 KB
234 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://assets.adobedtm.com/822408db7b4a/f9e889f09bf1/launch-758c59e3763b.min.js185 KB78 KB (42%)✓3rd
https://assets.adobedtm.com/822408db7b4a/f9e889f09bf1/launch-758c59e3763b.min.js0 KB78 KB (42%)✓3rd
https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/js/5338.58f9d3cf4111faf68a83.js58 KB34 KB (58%)✓3rd
https://assetscloud.acs.org/v2.0/acs-bootstrap/js/dotorg.min.js53 KB23 KB (45%)✓3rd
https://cmp.osano.com/16BPzAUFV1UoQ26HU/2eaa77d8-4afc-4efc-b4ec-b1457425e528/osano.js69 KB21 KB (31%)✓3rd
https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/js/cq5-newsticker.f15dd92daee7c8d6c94f.js4 KB—✓3rd
https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/js/cq5-carousel-4up.47327dc261edbf45dfd0.js1 KB—✓3rd
blob:https://www.acs.org/9322ad07-dfc0-42f4-8248-d87988426516-0 KB—✓3rd
https://www.acs.org/_Incapsula_Resource?SWJIYLWA=719d34d31c8e3a6e6fffd425f7e032f3&ns=3&cb=24875103719 KB—✓3rd
blob:https://www.acs.org/ac2955d3-c87d-49b9-bbd4-dd678d19d499-0 KB—✓3rd

Consider code splitting or tree shaking to reduce unused code.

Why this matters

This bundle has high unused code — code-split or tree-shake to ship only what executes.

Source: web.dev / Lighthouse coverage

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

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
4 fonts (392 KB)
PASS
4 fonts (392 KB)
Info::
4 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

4

392 KB total

Render-blocking

0

of 4

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.5 s LCP 2.3 shttps://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/fonts/stolzl/Stolzl-Book.woff2Stolzl-Book.woff2 https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/fonts/stolzl/Stolzl-Book.woff2 — 23.1 KiB — 30 ms — font-display: swaphttps://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/fonts/stolzl/Stolzl-Medium.woff2Stolzl-Medium.woff2 https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/fonts/stolzl/Stolzl-Medium.woff2 — 22.8 KiB — 14 ms — font-display: swaphttps://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/fonts/stolzl/Stolzl-Regular.woff2Stolzl-Regular.woff2 https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/fonts/stolzl/Stolzl-Regular.woff2 — 22.9 KiB — 15 ms — font-display: swaphttps://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/fonts/fontawesome/fa-regular-400.woff2fa-regular-400.woff2 https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/fonts/fontawesome/fa-regular-400.woff2 — 323.0 KiB — 30 ms — font-display: swap
Stolzl-Book.woff2 woff2 swap
Size 23 KB
Load time 30 ms
Start 486 ms
Risk FOUT — text flashes from fallback to web font
Stolzl-Medium.woff2 woff2 swap
Size 23 KB
Load time 14 ms
Start 736 ms
Risk FOUT — text flashes from fallback to web font
Stolzl-Regular.woff2 woff2 swap
Size 23 KB
Load time 15 ms
Start 737 ms
Risk FOUT — text flashes from fallback to web font
fa-regular-400.woff2 woff2 swap
Size 323 KB
Load time 30 ms
Start 738 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
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 ~161 KB and ~322 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
Network Waterfall
76 requests over 3631ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 1.5 s LCP 2.3 shttps://acs.org// https://acs.org/ — 301 — 38 B — 419 ms — h2https://www.acs.org/www.acs.org/ https://www.acs.org/ — 200 — 537 B — 11 ms — h2https://www.acs.org/_Incapsula_Resource?SWJIYLWA=5074a744e2e3d891814e9a2dace20bd4,719d34d31c8e3a6e6fffd425f7e032f3www.acs.org/_Incapsula_Resource?SWJ... https://www.acs.org/_Incapsula_Resource?SWJIYLWA=5074a744e2e3d891814e9a2dace20bd4,719d34d31c8e3a6e6fffd425f7e032f3 — 200 — 25.1 KiB — 13 ms — h2https://www.acs.org/_Incapsula_Resource?SWHANEDL=7323992652791725368,8909437801464085724,16032850955649015935,247050www.acs.org/_Incapsula_Resource?SWH... https://www.acs.org/_Incapsula_Resource?SWHANEDL=7323992652791725368,8909437801464085724,16032850955649015935,247050 — 200 — 56 B — 3 ms — h2https://www.acs.org/www.acs.org/ https://www.acs.org/ — 200 — 24.2 KiB — 24 ms — h2https://www.acs.org/_Incapsula_Resource?SWKMTFSR=1&e=0.7017365672246387www.acs.org/_Incapsula_Resource?SWK... https://www.acs.org/_Incapsula_Resource?SWKMTFSR=1&e=0.7017365672246387 — 200 — 35 B — 4 ms — h2https://www.acs.org/_Incapsula_Resource?ES2LURCT=67&t=78&d=complete%20(s%3A0%2Cc%3A5%2Cr%3A24)www.acs.org/_Incapsula_Resource?ES2... https://www.acs.org/_Incapsula_Resource?ES2LURCT=67&t=78&d=complete%20(s%3A0%2Cc%3A5%2Cr%3A24) — -1 — 0 B — 0 ms — https://www.acs.org/.rum/@adobe/helix-rum-js@%5E2/dist/micro.jswww.acs.org/.rum/@adobe/helix-rum-j... https://www.acs.org/.rum/@adobe/helix-rum-js@%5E2/dist/micro.js — 200 — 1.0 KiB — 28 ms — h2https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/images/acs-logo.svgwww.acs.org/etc.clientlibs/acs-cdn/... https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/images/acs-logo.svg — 200 — 10.1 KiB — 30 ms — h2https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/fonts/stolzl/Stolzl-Book.woff2www.acs.org/etc.clientlibs/acs-cdn/... https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/fonts/stolzl/Stolzl-Book.woff2 — 200 — 23.1 KiB — 30 ms — h2https://cmp.osano.com/16BPzAUFV1UoQ26HU/2eaa77d8-4afc-4efc-b4ec-b1457425e528/osano.jscmp.osano.com/16BPzAUFV1UoQ26HU/2ea... https://cmp.osano.com/16BPzAUFV1UoQ26HU/2eaa77d8-4afc-4efc-b4ec-b1457425e528/osano.js — 200 — 69.1 KiB — 68 ms — h3https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/dotorg.lc-3e3588a4694c0080a5b19176174e2b0b-lc.min.csswww.acs.org/etc.clientlibs/acs-cdn/... https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/dotorg.lc-3e3588a4694c0080a5b19176174e2b0b-lc.min.css — 200 — 110.6 KiB — 31 ms — h2https://www.acs.org/content/dam/acsorg/150/assets/banner/style-DNLK_N6E.csswww.acs.org/content/dam/acsorg/150/... https://www.acs.org/content/dam/acsorg/150/assets/banner/style-DNLK_N6E.css — 200 — 1.8 KiB — 25 ms — h2https://www.acs.org/content/dam/acsorg/150/assets/banner/images/150-mark.svgwww.acs.org/content/dam/acsorg/150/... https://www.acs.org/content/dam/acsorg/150/assets/banner/images/150-mark.svg — 200 — 5.2 KiB — 26 ms — h2https://assetscloud.acs.org/v2.0/acs-bootstrap/js/dotorg.min.jsassetscloud.acs.org/v2.0/acs-bootst... https://assetscloud.acs.org/v2.0/acs-bootstrap/js/dotorg.min.js — 200 — 52.6 KiB — 419 ms — h2https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/components.lc-b6175fcee7a91b1591f7aa1daf7d7018-lc.min.jswww.acs.org/etc.clientlibs/acs-cdn/... https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/components.lc-b6175fcee7a91b1591f7aa1daf7d7018-lc.min.js — 200 — 25.0 KiB — 12 ms — h2https://assets.adobedtm.com/822408db7b4a/f9e889f09bf1/launch-758c59e3763b.min.jsassets.adobedtm.com/822408db7b4a/f9... https://assets.adobedtm.com/822408db7b4a/f9e889f09bf1/launch-758c59e3763b.min.js — 200 — 185.4 KiB — 52 ms — h2blob:https://www.acs.org/9322ad07-dfc0-42f4-8248-d87988426516www.acs.org/9322ad07-dfc0-42f4-8248... blob:https://www.acs.org/9322ad07-dfc0-42f4-8248-d87988426516 — 200 — -1 B — 31 ms — blobhttps://www.acs.org/_Incapsula_Resource?SWJIYLWA=719d34d31c8e3a6e6fffd425f7e032f3&ns=3&cb=248751037www.acs.org/_Incapsula_Resource?SWJ... https://www.acs.org/_Incapsula_Resource?SWJIYLWA=719d34d31c8e3a6e6fffd425f7e032f3&ns=3&cb=248751037 — 200 — 19.3 KiB — 12 ms — h2https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/css/print.csswww.acs.org/etc.clientlibs/acs-cdn/... https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/css/print.css — 200 — 501 B — 18 ms — h2https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/images/redesign/icon-search-blue.svgwww.acs.org/etc.clientlibs/acs-cdn/... https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/images/redesign/icon-search-blue.svg — 200 — 923 B — 11 ms — h2https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/images/home-dropdown.jpgwww.acs.org/etc.clientlibs/acs-cdn/... https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/images/home-dropdown.jpg — 200 — 3.5 KiB — 14 ms — h2https://www.acs.org/adobe/dynamicmedia/deliver/dm-aid--af2fb873-b5f4-4acd-af59-f8fba0e32acf/hero-bg.jpg.webp?quality=90&width=1200www.acs.org/adobe/dynamicmedia/deli... https://www.acs.org/adobe/dynamicmedia/deliver/dm-aid--af2fb873-b5f4-4acd-af59-f8fba0e32acf/hero-bg.jpg.webp?quality=90&width=1200 — 200 — 32.5 KiB — 303 ms — h2https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/fonts/stolzl/Stolzl-Medium.woff2www.acs.org/etc.clientlibs/acs-cdn/... https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/fonts/stolzl/Stolzl-Medium.woff2 — 200 — 22.8 KiB — 14 ms — h2https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/fonts/stolzl/Stolzl-Regular.woff2www.acs.org/etc.clientlibs/acs-cdn/... https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/fonts/stolzl/Stolzl-Regular.woff2 — 200 — 22.9 KiB — 15 ms — 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blobblob:https://www.acs.org/6c846f3e-c37e-4355-a849-e93063c8d63dwww.acs.org/6c846f3e-c37e-4355-a849... blob:https://www.acs.org/6c846f3e-c37e-4355-a849-e93063c8d63d — 200 — -1 B — 79 ms — blobblob:https://www.acs.org/e5ce7b84-0fe7-4c91-8037-429d9ad63e85www.acs.org/e5ce7b84-0fe7-4c91-8037... blob:https://www.acs.org/e5ce7b84-0fe7-4c91-8037-429d9ad63e85 — 200 — -1 B — 90 ms — blobblob:https://www.acs.org/f6da3df2-e513-497c-9b42-69b19270914awww.acs.org/f6da3df2-e513-497c-9b42... blob:https://www.acs.org/f6da3df2-e513-497c-9b42-69b19270914a — 200 — -1 B — 87 ms — blobhttps://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/images/redesign/icon-avatar-light.svgwww.acs.org/etc.clientlibs/acs-cdn/... https://www.acs.org/etc.clientlibs/acs-cdn/aem6/cdn/static/resources/images/redesign/icon-avatar-light.svg — 200 — 555 B — 17 ms — h2https://www.youtube.com/iframe_apiwww.youtube.com/iframe_api https://www.youtube.com/iframe_api — 200 — 3.2 KiB — 98 ms — h2https://assetscloud.acs.org/v2.0/acs-bootstrap/images/favicon.icoassetscloud.acs.org/v2.0/acs-bootst... https://assetscloud.acs.org/v2.0/acs-bootstrap/images/favicon.ico — 200 — 1.1 KiB — 146 ms — h2https://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 — 29 ms — h2https://americanchemicalsociety.demdex.net/event?d_dil_ver=9.5&_ts=1776797947097americanchemicalsociety.demdex.net/... https://americanchemicalsociety.demdex.net/event?d_dil_ver=9.5&_ts=1776797947097 — 200 — 629 B — 135 ms — h2https://assets.adobedtm.com/822408db7b4a/f9e889f09bf1/9e7eae33fcb5/RCedec5a4ee04e48fcab601452a30dd9f0-source.min.jsassets.adobedtm.com/822408db7b4a/f9... https://assets.adobedtm.com/822408db7b4a/f9e889f09bf1/9e7eae33fcb5/RCedec5a4ee04e48fcab601452a30dd9f0-source.min.js — 200 — 508 B — 5 ms — h2
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 1067ms · 171KB · $14/mo
www.acs.org
Other
Costly
Execution 272ms
Transfer 24 KB
Monthly Cost $4/mo
cmp.osano.com
Other
Costly
Execution 266ms
Transfer 69 KB
Unused 31%
Monthly Cost $4/mo
assets.adobedtm.com
Other
Costly
Execution 239ms
Transfer 0 KB
Unused 42%
Monthly Cost $3/mo
Unattributable
Other
Optional
Execution 161ms
Transfer 0 KB
Monthly Cost $2/mo
assetscloud.acs.org
Other
Optional
Execution 65ms
Transfer 53 KB
Unused 45%
Monthly Cost $1/mo
www.acs.org
Other
Optional
Execution 62ms
Transfer 25 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.acs.org adds 272ms and costs ~$4/month
  • cmp.osano.com adds 266ms and costs ~$4/month
  • assets.adobedtm.com adds 239ms and costs ~$3/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

www.acs.org takes 272ms 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

cmp.osano.com takes 266ms 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

assets.adobedtm.com takes 239ms 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

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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