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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
70
GRADE
C
FIX
6
REVIEW
2
PASS
7
INFO
2

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

Mobile Desktop
25
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
81
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.
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.

3.74 s

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

13.17 s

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

1.58 s

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

0.180

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

8.16 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.

15.39 s

Page Load Progression

2.3 s
4.6 s
6.9 s
9.2 s
11.5 s
13.8 s
16.1 s
18.4 s
Checks
17
7 PASS 2 REVIEW 6 FIX
F
Page Weight Budget
Action
54.9 MB transferred, 94 requests
FIX
54.9 MB transferred, 94 requests
Critical::
Page weighs 72.4 MB (54.9 MB transferred)
Warning::
JavaScript is 1.1 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.1 MB
Info::
Fonts are 456 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 456 KB
Info::
94 HTTP requests
Info::
Estimated 11.5 g CO2 per page load
54.9 MB / 2.4 MB budget
54.9 MB transferred
94 requests
11.5 g CO2 per page load
Other 52.3 MiB 95%
JavaScript 1.1 MiB 2%
Images 963.3 KiB 2%
Fonts 456.3 KiB 1%
CSS 84.9 KiB 0%
HTML 52.8 KiB 0%
Other 11.3 KiB 0%
Other 2.3 KiB 0%
Other 910 B 0%
Other 840 B 0%
Other 0 B 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

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 (54.9 MiB of 54.9 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
5646ms total JS execution
FIX
5646ms total JS execution
Warning::
Unattributable: 1934ms CPU time
Warning::
https://www.astm.org/_next/static/chunks/webpack-9...: 807ms CPU time
Warning::
https://www.astm.org/_next/static/chunks/3131-221e...: 678ms CPU time
Warning::
https://www.astm.org/: 500ms CPU time
Warning::
https://www.googletagmanager.com/gtag/destination?...: 391ms CPU time
Warning::
Third-party scripts: 5646ms (100% of total)

Main Thread Breakdown

Script Evaluation 48% Other 34% Script Parsing & Compilation 7% Style & Layout 5% Garbage Collection 3%
ScriptTotalScriptingParse/CompileParty
Unattributable1934ms67ms0ms3rd
https://www.astm.org/_next/static/chunks/webpack-955ea9e689c54099.js807ms799ms0ms3rd
https://www.astm.org/_next/static/chunks/3131-221e6607f27d6926.js678ms550ms44ms3rd
https://www.astm.org/500ms31ms34ms3rd
https://www.googletagmanager.com/gtag/destination?id=G-YXS8H95P3G&cx=c&gtm=4e64k0h2391ms338ms50ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-54ZG9PKC375ms311ms50ms3rd
https://script.hotjar.com/modules.6a0f3932cb1341a35c18.js299ms248ms19ms3rd
https://www.astm.org/_next/static/chunks/c7879cf7-fabe25011515220e.js297ms172ms13ms3rd
https://www.astm.org/_next/static/chunks/992-e94673434af1789a.js211ms123ms16ms3rd
https://www.googletagmanager.com/gtag/js?id=G-YXS8H95P3G&cx=c&gtm=4e64k0h281ms33ms48ms3rd

Showing top 10 of 11 scripts

D
JS Bundles
Action
36 scripts, 436 KB unused
FIX
36 scripts, 436 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-YXS8...: 116 KB unused (67%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/destination?...: 71 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.astm.org/_next/static/chunks/7273-57e2...: 67 KB unused (62%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-54Z...: 61 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.astm.org/_next/static/chunks/4245-8988...: 58 KB unused (56%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 436 KB
436 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-YXS8H95P3G&cx=c&gtm=4e64k0h2173 KB116 KB (67%)✓3rd
https://www.googletagmanager.com/gtag/destination?id=G-YXS8H95P3G&cx=c&gtm=4e64k0h2173 KB71 KB (41%)✓3rd
https://www.astm.org/_next/static/chunks/7273-57e2012880982d18.js109 KB67 KB (62%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-54ZG9PKC152 KB61 KB (40%)✓3rd
https://www.astm.org/_next/static/chunks/4245-89881a608d3d3b37.js105 KB58 KB (56%)✓3rd
https://script.hotjar.com/modules.6a0f3932cb1341a35c18.js57 KB38 KB (67%)✓3rd
https://www.astm.org/_next/static/chunks/992-e94673434af1789a.js58 KB25 KB (44%)✓3rd
https://www.astm.org/_next/static/chunks/app/layout-49b3769bb30c5179.js2 KB—✓3rd
https://www.astm.org/_next/static/chunks/1918-2c1929e041689eff.js5 KB—✓3rd
https://www.astm.org/_next/static/chunks/140bf7e7-0d5934ba9777d20e.js2 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

F
Page Weight Inventory
Action
94 resources · 54.9 MB · 436 KB savings available
FIX
94 resources · 54.9 MB · 436 KB savings available
Warning::
Page weight 53.9 MB over 1MB target
Got: 54.9 MB Expected: ≤ 1 MB
Info::
~436 KB of savings available
Warning::
93 third-party resources (100% of weight)
Info::
3 resources over 200KB
94 resources · 54.9 MiB · 93 third-party 53.9 MiB over 1MB target
Media 95% · 52.3 MiB
JavaScript 2% · 1.1 MiB
Image 2% · 964.5 KiB
Font 1% · 456.3 KiB
CSS 0% · 84.9 KiB
Document 0% · 52.8 KiB
Other 0% · 12.2 KiB

~435.9 KiB of savings available

Remove unused JavaScript: 435.9 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
Image Optimization
13 images, 0 KB saveable
REVIEW
13 images, 0 KB saveable
Warning::
https://www.astm.org/v3/assets/blt5eb0a2cb04534832... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
13 images 963 KB
0 oversized -0 KB
12 legacy format
1 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

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 (456 KB)
PASS
5 fonts (456 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

456 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 FCP 3.7 s LCP 13.2 shttps://use.typekit.net/af/404934/00000000000000007735bb2a/31/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3l https://use.typekit.net/af/404934/00000000000000007735bb2a/31/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3 — 34.9 KiB — 9 ms — font-display: swaphttps://www.astm.org/_next/static/media/fa-solid-900.1c1969ce.woff2fa-solid-900.1c1969ce.w... https://www.astm.org/_next/static/media/fa-solid-900.1c1969ce.woff2 — 139.0 KiB — 58 ms — font-display: swaphttps://use.typekit.net/af/98fb6b/00000000000000007735bb14/31/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3l https://use.typekit.net/af/98fb6b/00000000000000007735bb14/31/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3 — 35.9 KiB — 10 ms — font-display: swaphttps://www.astm.org/_next/static/media/fa-brands-400.5bc0fb2c.woff2fa-brands-400.5bc0fb2c.... https://www.astm.org/_next/static/media/fa-brands-400.5bc0fb2c.woff2 — 75.4 KiB — 83 ms — font-display: swaphttps://www.astm.org/_next/static/media/fa-regular-400.c432bd7d.woff2fa-regular-400.c432bd7d... https://www.astm.org/_next/static/media/fa-regular-400.c432bd7d.woff2 — 171.0 KiB — 476 ms — font-display: swap
l woff2 swap
Size 35 KB
Load time 9 ms
Start 2.4 s
Risk FOUT — text flashes from fallback to web font
fa-solid-900.1c1969ce.w... woff2 swap
Size 139 KB
Load time 58 ms
Start 2.4 s
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
l woff2 swap
Size 36 KB
Load time 10 ms
Start 2.4 s
Risk FOUT — text flashes from fallback to web font
fa-brands-400.5bc0fb2c.... woff2 swap
Size 75 KB
Load time 83 ms
Start 2.4 s
Risk FOUT — text flashes from fallback to web font
fa-regular-400.c432bd7d... woff2 swap
Size 171 KB
Load time 476 ms
Start 2.8 s
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 ~155 KB and ~310 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
6 hints, 0 missing preconnects
PASS
6 hints, 0 missing preconnects
Info::
Page uses 6 resource hint(s)

Current Resource Hints

preconnect
—
preload
6
dns-prefetch
—
prefetch
—

6 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
94 requests over 33739ms
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 30.0 s 32.0 s 34.0 s FCP 3.7 s LCP 13.2 shttps://astm.org// https://astm.org/ — 301 — 242 B — 105 ms — h2https://www.astm.org/www.astm.org/ https://www.astm.org/ — 200 — 52.8 KiB — 2.0 s — h2https://www.astm.org/_next/static/css/f1571eea04d057cb.csswww.astm.org/_next/static/css/f1571... https://www.astm.org/_next/static/css/f1571eea04d057cb.css — 200 — 13.4 KiB — 34 ms — h2https://www.astm.org/_next/static/css/2e2b0d5f8f450d37.csswww.astm.org/_next/static/css/2e2b0... https://www.astm.org/_next/static/css/2e2b0d5f8f450d37.css — 200 — 30.9 KiB — 38 ms — h2https://www.astm.org/_next/static/css/34711861f0d83b3b.csswww.astm.org/_next/static/css/34711... https://www.astm.org/_next/static/css/34711861f0d83b3b.css — 200 — 24.2 KiB — 33 ms — h2https://www.astm.org/_next/static/css/8a34cce2acce2524.csswww.astm.org/_next/static/css/8a34c... https://www.astm.org/_next/static/css/8a34cce2acce2524.css — 200 — 2.9 KiB — 12 ms — h2https://www.astm.org/_next/static/css/4dd16332ec3b022d.csswww.astm.org/_next/static/css/4dd16... https://www.astm.org/_next/static/css/4dd16332ec3b022d.css — 200 — 6.6 KiB — 17 ms — h2https://www.astm.org/_next/static/css/ccfdae096b1a1c74.csswww.astm.org/_next/static/css/ccfda... https://www.astm.org/_next/static/css/ccfdae096b1a1c74.css — 200 — 3.1 KiB — 13 ms — h2https://www.astm.org/_next/static/css/b363c8227c8926ce.csswww.astm.org/_next/static/css/b363c... https://www.astm.org/_next/static/css/b363c8227c8926ce.css — 200 — 624 B — 15 ms — h2https://www.astm.org/_next/static/css/0706ba86cf3aec90.csswww.astm.org/_next/static/css/0706b... https://www.astm.org/_next/static/css/0706ba86cf3aec90.css — 200 — 1.8 KiB — 18 ms — h2https://cdn.cookielaw.org/scripttemplates/otSDKStub.jscdn.cookielaw.org/scripttemplates/o... https://cdn.cookielaw.org/scripttemplates/otSDKStub.js — -1 — 0 B — 133 ms — https://cdn.cookielaw.org/consent/b207a074-2cb8-4157-afef-451fd30e1c5a-test/OtAutoBlock.jscdn.cookielaw.org/consent/b207a074-... https://cdn.cookielaw.org/consent/b207a074-2cb8-4157-afef-451fd30e1c5a-test/OtAutoBlock.js — -1 — 0 B — 133 ms — https://www.googletagmanager.com/gtm.js?id=GTM-54ZG9PKCwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-54ZG9PKC — 200 — 152.5 KiB — 178 ms — h2https://use.typekit.net/bpp4kqc.cssuse.typekit.net/bpp4kqc.css https://use.typekit.net/bpp4kqc.css — 200 — 1.1 KiB — 508 ms — h2https://www.astm.org/images/logo/astm-header-logo.svgwww.astm.org/images/logo/astm-heade... https://www.astm.org/images/logo/astm-header-logo.svg — 200 — 3.5 KiB — 335 ms — h2https://www.astm.org/images/logo/astm-header-mobile-logo.svgwww.astm.org/images/logo/astm-heade... https://www.astm.org/images/logo/astm-header-mobile-logo.svg — 200 — 2.8 KiB — 315 ms — h2https://www.astm.org/_next/static/chunks/webpack-955ea9e689c54099.jswww.astm.org/_next/static/chunks/we... https://www.astm.org/_next/static/chunks/webpack-955ea9e689c54099.js — 200 — 2.4 KiB — 27 ms — h2https://www.astm.org/_next/static/chunks/c7879cf7-fabe25011515220e.jswww.astm.org/_next/static/chunks/c7... https://www.astm.org/_next/static/chunks/c7879cf7-fabe25011515220e.js — 200 — 53.7 KiB — 47 ms — h2https://www.astm.org/_next/static/chunks/3131-221e6607f27d6926.jswww.astm.org/_next/static/chunks/31... https://www.astm.org/_next/static/chunks/3131-221e6607f27d6926.js — 200 — 45.8 KiB — 42 ms — h2https://www.astm.org/_next/static/chunks/main-app-14ca3a7cef56c1a2.jswww.astm.org/_next/static/chunks/ma... https://www.astm.org/_next/static/chunks/main-app-14ca3a7cef56c1a2.js — 200 — 1.1 KiB — 29 ms — h2https://www.astm.org/_next/static/chunks/3134-0f6a40c051d2928c.jswww.astm.org/_next/static/chunks/31... https://www.astm.org/_next/static/chunks/3134-0f6a40c051d2928c.js — 200 — 4.0 KiB — 27 ms — h2https://www.astm.org/_next/static/chunks/app/%5B%5B...slug%5D%5D/not-found-a3a6d81a99412fd9.jswww.astm.org/_next/static/chunks/ap... https://www.astm.org/_next/static/chunks/app/%5B%5B...slug%5D%5D/not-found-a3a6d81a99412fd9.js — 200 — 1.3 KiB — 29 ms — h2https://www.astm.org/_next/static/chunks/140bf7e7-0d5934ba9777d20e.jswww.astm.org/_next/static/chunks/14... https://www.astm.org/_next/static/chunks/140bf7e7-0d5934ba9777d20e.js — 200 — 1.9 KiB — 43 ms — h2https://www.astm.org/_next/static/chunks/9104-e8dc01817d8cc499.jswww.astm.org/_next/static/chunks/91... https://www.astm.org/_next/static/chunks/9104-e8dc01817d8cc499.js — 200 — 7.0 KiB — 31 ms — h2https://www.astm.org/_next/static/chunks/7273-57e2012880982d18.jswww.astm.org/_next/static/chunks/72... https://www.astm.org/_next/static/chunks/7273-57e2012880982d18.js — 200 — 108.7 KiB — 62 ms — h2https://www.astm.org/_next/static/chunks/5247-b377b12005c3b713.jswww.astm.org/_next/static/chunks/52... https://www.astm.org/_next/static/chunks/5247-b377b12005c3b713.js — 200 — 4.4 KiB — 51 ms — h2https://www.astm.org/_next/static/chunks/4245-89881a608d3d3b37.jswww.astm.org/_next/static/chunks/42... https://www.astm.org/_next/static/chunks/4245-89881a608d3d3b37.js — 200 — 105.0 KiB — 73 ms — h2https://www.astm.org/_next/static/chunks/6351-b60adba09335b06c.jswww.astm.org/_next/static/chunks/63... https://www.astm.org/_next/static/chunks/6351-b60adba09335b06c.js — 200 — 36.9 KiB — 47 ms — h2https://www.astm.org/_next/static/chunks/992-e94673434af1789a.jswww.astm.org/_next/static/chunks/99... https://www.astm.org/_next/static/chunks/992-e94673434af1789a.js — 200 — 58.2 KiB — 72 ms — h2https://www.astm.org/_next/static/chunks/5869-f71fd479951ea739.jswww.astm.org/_next/static/chunks/58... https://www.astm.org/_next/static/chunks/5869-f71fd479951ea739.js — 200 — 3.1 KiB — 31 ms — h2
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http/1.1https://browser-intake-datadoghq.com/api/v2/rum?ddsource=browser&dd-api-key=pub3ab61fe8d20899fb08076dcce8701dab&dd-evp-origin-version=6.22.0&dd-evp-origin=browser&dd-request-id=e7dc6be5-b4f7-4fe6-9743-6a8f4e0950d3&batch_time=1776816095959&_dd.api=fetch-keepalivebrowser-intake-datadoghq.com/api/v2... https://browser-intake-datadoghq.com/api/v2/rum?ddsource=browser&dd-api-key=pub3ab61fe8d20899fb08076dcce8701dab&dd-evp-origin-version=6.22.0&dd-evp-origin=browser&dd-request-id=e7dc6be5-b4f7-4fe6-9743-6a8f4e0950d3&batch_time=1776816095959&_dd.api=fetch-keepalive — 202 — 464 B — 494 ms — http/1.1https://px.ads.linkedin.com/attribution_trigger?pid=4091468&time=1776816095973&url=https%3A%2F%2Fwww.astm.org%2Fpx.ads.linkedin.com/attribution_tri... https://px.ads.linkedin.com/attribution_trigger?pid=4091468&time=1776816095973&url=https%3A%2F%2Fwww.astm.org%2F — 200 — 840 B — 225 ms — h2https://px.ads.linkedin.com/collect?v=2&fmt=js&pid=4091468&time=1776816095973&url=https%3A%2F%2Fwww.astm.org%2Fpx.ads.linkedin.com/collect?v=2&fmt... https://px.ads.linkedin.com/collect?v=2&fmt=js&pid=4091468&time=1776816095973&url=https%3A%2F%2Fwww.astm.org%2F — 302 — 820 B — 218 ms — h2https://www.astm.org/favicon/favicon.icowww.astm.org/favicon/favicon.ico https://www.astm.org/favicon/favicon.ico — 200 — 637 B — 218 ms — h2https://js.zi-scripts.com/unified/v1/master/getSubscriptionsjs.zi-scripts.com/unified/v1/master... https://js.zi-scripts.com/unified/v1/master/getSubscriptions — 204 — 0 B — 195 ms — h3https://script.hotjar.com/modules.6a0f3932cb1341a35c18.jsscript.hotjar.com/modules.6a0f3932c... https://script.hotjar.com/modules.6a0f3932cb1341a35c18.js — 200 — 56.6 KiB — 48 ms — h2https://region1.google-analytics.com/g/collect?v=2&tid=G-YXS8H95P3G&gtm=45je64k0h2v9204516696z89204513885za20gzb9204513885zd9204513885&_p=1776816095748&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&_prs=gs.wg&are=1&cid=1488882467.1776816096&frm=0&pscdl=noapi&rcb=18&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=0~115938465~115938468~117266400~117512543~118463261&sid=1776816096&sct=1&seg=0&dl=https%3A%2F%2Fwww.astm.org%2F&dt=ASTM%20International%20%7C%20ASTM&en=page_view&_fv=1&_nsi=1&_ss=1&_c=1&tfd=3037region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-YXS8H95P3G&gtm=45je64k0h2v9204516696z89204513885za20gzb9204513885zd9204513885&_p=1776816095748&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&_prs=gs.wg&are=1&cid=1488882467.1776816096&frm=0&pscdl=noapi&rcb=18&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=0~115938465~115938468~117266400~117512543~118463261&sid=1776816096&sct=1&seg=0&dl=https%3A%2F%2Fwww.astm.org%2F&dt=ASTM%20International%20%7C%20ASTM&en=page_view&_fv=1&_nsi=1&_ss=1&_c=1&tfd=3037 — 204 — 556 B — 88 ms — h2https://region1.google-analytics.com/g/collect?v=2&tid=G-YXS8H95P3G&gtm=45je64k0h2v9204516696z89204513885za20gzb9204513885zd9204513885&_p=1776816095748&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&_eu=AAAAAAQ&_prs=gs.wg&are=1&cid=1488882467.1776816096&frm=0&pscdl=noapi&rcb=18&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=2&tag_exp=0~115938465~115938468~117266400~117512543~118463261&dl=https%3A%2F%2Fwww.astm.org%2F&dr=&sid=1776816096&sct=1&seg=1&dt=ASTM%20International%20%7C%20ASTM&en=page_view&_c=1&ep.content_type=landing&ep.department=Home&ep.target_url=&ep.gtm_info=GTM-54ZG9PKC%20-%2010&ep.method=&ep.entry_uid=&ep.locale=&ep.environment=&ep.gtm_tag_name=Custom%20Pageview%20-%20page_view&_et=9&tfd=3052region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-YXS8H95P3G&gtm=45je64k0h2v9204516696z89204513885za20gzb9204513885zd9204513885&_p=1776816095748&gcd=13l3l3l2l1l1&npa=1&dma_cps=a&dma=1&_eu=AAAAAAQ&_prs=gs.wg&are=1&cid=1488882467.1776816096&frm=0&pscdl=noapi&rcb=18&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=2&tag_exp=0~115938465~115938468~117266400~117512543~118463261&dl=https%3A%2F%2Fwww.astm.org%2F&dr=&sid=1776816096&sct=1&seg=1&dt=ASTM%20International%20%7C%20ASTM&en=page_view&_c=1&ep.content_type=landing&ep.department=Home&ep.target_url=&ep.gtm_info=GTM-54ZG9PKC%20-%2010&ep.method=&ep.entry_uid=&ep.locale=&ep.environment=&ep.gtm_tag_name=Custom%20Pageview%20-%20page_view&_et=9&tfd=3052 — 204 — 57 B — 78 ms — h2https://browser-intake-datadoghq.com/api/v2/rum?ddsource=browser&dd-api-key=pub3ab61fe8d20899fb08076dcce8701dab&dd-evp-origin-version=6.22.0&dd-evp-origin=browser&dd-request-id=2997ef0f-390c-42d0-abc3-19d73685d108&batch_time=1776816096122&_dd.api=fetch-keepalivebrowser-intake-datadoghq.com/api/v2... https://browser-intake-datadoghq.com/api/v2/rum?ddsource=browser&dd-api-key=pub3ab61fe8d20899fb08076dcce8701dab&dd-evp-origin-version=6.22.0&dd-evp-origin=browser&dd-request-id=2997ef0f-390c-42d0-abc3-19d73685d108&batch_time=1776816096122&_dd.api=fetch-keepalive — 202 — 464 B — 414 ms — http/1.1https://www.astm.org/api/auth/cart-countwww.astm.org/api/auth/cart-count https://www.astm.org/api/auth/cart-count — 200 — 429 B — 127 ms — h2https://iam.astm.org/api/v1/sessions/meiam.astm.org/api/v1/sessions/me https://iam.astm.org/api/v1/sessions/me — 404 — 1.4 KiB — 431 ms — h2data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23000'%3e%3…www.w3.org/2000/svg' viewBox='0 0 1... data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23000'%3e%3… — 200 — 0 B — 0 ms — datahttps://px4.ads.linkedin.com/collect?v=2&fmt=js&pid=4091468&time=1776816095973&url=https%3A%2F%2Fwww.astm.org%2F&e_ipv6=AQIK7OJFQkbOlQAAAZ2yfgOQ8wsZNrZarSYaaz0DBrUUmqI4LJUpoxkMdqP2-eaDr6e5tM56P-Epx4.ads.linkedin.com/collect?v=2&fm... https://px4.ads.linkedin.com/collect?v=2&fmt=js&pid=4091468&time=1776816095973&url=https%3A%2F%2Fwww.astm.org%2F&e_ipv6=AQIK7OJFQkbOlQAAAZ2yfgOQ8wsZNrZarSYaaz0DBrUUmqI4LJUpoxkMdqP2-eaDr6e5tM56P-E — 200 — 692 B — 302 ms — h2https://js.zi-scripts.com/unified/v1/master/getSubscriptionsjs.zi-scripts.com/unified/v1/master... https://js.zi-scripts.com/unified/v1/master/getSubscriptions — 200 — 791 B — 179 ms — h3https://browser-intake-datadoghq.com/api/v2/rum?ddsource=browser&dd-api-key=pub3ab61fe8d20899fb08076dcce8701dab&dd-evp-origin-version=6.22.0&dd-evp-origin=browser&dd-request-id=9a5a65ca-ab35-4ae8-a792-66449478b5e1&batch_time=1776816096254&_dd.api=fetch-keepalivebrowser-intake-datadoghq.com/api/v2... https://browser-intake-datadoghq.com/api/v2/rum?ddsource=browser&dd-api-key=pub3ab61fe8d20899fb08076dcce8701dab&dd-evp-origin-version=6.22.0&dd-evp-origin=browser&dd-request-id=9a5a65ca-ab35-4ae8-a792-66449478b5e1&batch_time=1776816096254&_dd.api=fetch-keepalive — -1 — 0 B — 0 ms — https://browser-intake-datadoghq.com/api/v2/rum?ddsource=browser&dd-api-key=pub3ab61fe8d20899fb08076dcce8701dab&dd-evp-origin-version=6.22.0&dd-evp-origin=browser&dd-request-id=8d555d0b-f82f-4624-9631-87a23fedfd8d&batch_time=1776816096256&_dd.api=fetchbrowser-intake-datadoghq.com/api/v2... https://browser-intake-datadoghq.com/api/v2/rum?ddsource=browser&dd-api-key=pub3ab61fe8d20899fb08076dcce8701dab&dd-evp-origin-version=6.22.0&dd-evp-origin=browser&dd-request-id=8d555d0b-f82f-4624-9631-87a23fedfd8d&batch_time=1776816096256&_dd.api=fetch — 202 — 464 B — 325 ms — http/1.1https://www.astm.org/api/auth/cart-countwww.astm.org/api/auth/cart-count https://www.astm.org/api/auth/cart-count — 200 — 430 B — 219 ms — h2https://www.astm.org/v3/assets/blt5eb0a2cb04534832/bltcdd3472809f7bad5/67b2e73ef398bb021940ed2d/home-compass@2x.jpgwww.astm.org/v3/assets/blt5eb0a2cb0... https://www.astm.org/v3/assets/blt5eb0a2cb04534832/bltcdd3472809f7bad5/67b2e73ef398bb021940ed2d/home-compass@2x.jpg — 200 — 230.3 KiB — 95 ms — h2https://ws.zoominfo.com/pixel/6571d7f5146d9ae5b7218d95/?iszitag=truews.zoominfo.com/pixel/6571d7f5146d9... https://ws.zoominfo.com/pixel/6571d7f5146d9ae5b7218d95/?iszitag=true — 200 — 0 B — 188 ms — h3https://px.ads.linkedin.com/wa/?medium=fetch&fmt=gpx.ads.linkedin.com/wa/?medium=fetc... https://px.ads.linkedin.com/wa/?medium=fetch&fmt=g — 204 — 619 B — 186 ms — h2https://browser-intake-datadoghq.com/api/v2/rum?ddsource=browser&dd-api-key=pub3ab61fe8d20899fb08076dcce8701dab&dd-evp-origin-version=6.22.0&dd-evp-origin=browser&dd-request-id=4f54ca8f-5766-4359-9140-94ed95811cc3&batch_time=1776816096519&_dd.api=fetch-keepalivebrowser-intake-datadoghq.com/api/v2... https://browser-intake-datadoghq.com/api/v2/rum?ddsource=browser&dd-api-key=pub3ab61fe8d20899fb08076dcce8701dab&dd-evp-origin-version=6.22.0&dd-evp-origin=browser&dd-request-id=4f54ca8f-5766-4359-9140-94ed95811cc3&batch_time=1776816096519&_dd.api=fetch-keepalive — 202 — 464 B — 132 ms — http/1.1https://ws.zoominfo.com/pixel/6571d7f5146d9ae5b7218d95/?iszitag=truews.zoominfo.com/pixel/6571d7f5146d9... https://ws.zoominfo.com/pixel/6571d7f5146d9ae5b7218d95/?iszitag=true — 200 — 1.8 KiB — 207 ms — h3blob:https://www.astm.org/9d507f1f-5903-43e2-a923-f0e86980f4f3www.astm.org/9d507f1f-5903-43e2-a92... blob:https://www.astm.org/9d507f1f-5903-43e2-a923-f0e86980f4f3 — 200 — 0 B — 1 ms — blobhttps://marketing.astm.org/acton/bn/9652?target=https%3A%2F%2Fwww.astm.org%2F&ref=&v=2&ts=1776816095903&nc=0marketing.astm.org/acton/bn/9652?ta... https://marketing.astm.org/acton/bn/9652?target=https%3A%2F%2Fwww.astm.org%2F&ref=&v=2&ts=1776816095903&nc=0 — 200 — 517 B — 184 ms — http/1.1https://www.astm.org/v3/assets/blt5eb0a2cb04534832/blt46961022f4903fdd/69e26eda1584da38304a6fe5/GettyImages-2209781840.movwww.astm.org/v3/assets/blt5eb0a2cb0... https://www.astm.org/v3/assets/blt5eb0a2cb04534832/blt46961022f4903fdd/69e26eda1584da38304a6fe5/GettyImages-2209781840.mov — 206 — 0 B — 12 ms — h2https://www.astm.org/v3/assets/blt5eb0a2cb04534832/blt46961022f4903fdd/69e26eda1584da38304a6fe5/GettyImages-2209781840.movwww.astm.org/v3/assets/blt5eb0a2cb0... https://www.astm.org/v3/assets/blt5eb0a2cb04534832/blt46961022f4903fdd/69e26eda1584da38304a6fe5/GettyImages-2209781840.mov — 206 — 0 B — 33 ms — h2https://browser-intake-datadoghq.com/api/v2/rum?ddsource=browser&dd-api-key=pub3ab61fe8d20899fb08076dcce8701dab&dd-evp-origin-version=6.22.0&dd-evp-origin=browser&dd-request-id=6543210d-7f7c-45a3-9353-d25dc95c7fad&batch_time=1776816126521&_dd.api=fetch-keepalivebrowser-intake-datadoghq.com/api/v2... https://browser-intake-datadoghq.com/api/v2/rum?ddsource=browser&dd-api-key=pub3ab61fe8d20899fb08076dcce8701dab&dd-evp-origin-version=6.22.0&dd-evp-origin=browser&dd-request-id=6543210d-7f7c-45a3-9353-d25dc95c7fad&batch_time=1776816126521&_dd.api=fetch-keepalive — 202 — 464 B — 268 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
100% of JavaScript execution is third-party
First-party Third-party 5646ms · 787KB · $32/mo
Unattributable
Other
Costly
Execution 1934ms
Transfer 0 KB
Monthly Cost $11/mo
www.astm.org
Other
Costly
Execution 807ms
Transfer 2 KB
Monthly Cost $5/mo
www.astm.org
Other
Costly
Execution 678ms
Transfer 46 KB
Monthly Cost $4/mo
www.astm.org
Other
Costly
Execution 500ms
Transfer 53 KB
Monthly Cost $3/mo
Google Tag Manager
Tag Manager
Costly
Execution 391ms
Transfer 173 KB
Unused 41%
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Costly
Execution 375ms
Transfer 152 KB
Unused 40%
Monthly Cost $2/mo
Hotjar
Session Replay
Costly
Execution 299ms
Transfer 57 KB
Unused 67%
Monthly Cost $2/mo
www.astm.org
Other
Costly
Execution 297ms
Transfer 54 KB
Monthly Cost $2/mo
www.astm.org
Other
Costly
Execution 211ms
Transfer 58 KB
Unused 44%
Monthly Cost $1/mo
Google Tag Manager
Tag Manager
Optional
Execution 81ms
Transfer 173 KB
Unused 67%
Monthly Cost $0/mo
LinkedIn Insight
Advertising
Optional
Execution 73ms
Transfer 19 KB
Monthly Cost $0/mo

These scripts may cost more than they're worth

  • Unattributable adds 1934ms and costs ~$11/month
  • www.astm.org adds 807ms and costs ~$5/month
  • www.astm.org adds 678ms and costs ~$4/month
  • www.astm.org adds 500ms and costs ~$3/month
  • Google Tag Manager adds 391ms and costs ~$2/month
  • Google Tag Manager adds 375ms and costs ~$2/month
  • Hotjar adds 299ms and costs ~$2/month
  • www.astm.org adds 297ms and costs ~$2/month
  • www.astm.org adds 211ms and costs ~$1/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 1934ms 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.astm.org takes 807ms 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.astm.org takes 678ms 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.astm.org takes 500ms 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 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

Google Tag Manager takes 375ms 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

Hotjar takes 299ms 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

67% of Hotjar'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

www.astm.org takes 297ms 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.astm.org takes 211ms 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

67% 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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