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https://forrester.com

Performance

· 15 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
84
GRADE
B
FIX
3
REVIEW
4
PASS
6
INFO
2

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

Mobile Desktop
82
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
100
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
100
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
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.

1.62 s

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

1.91 s

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

0 ms

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

0.000

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

2.12 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.

1.91 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
6 PASS 4 REVIEW 3 FIX
F
Page Weight Budget
Action
7.1 MB transferred, 60 requests
FIX
7.1 MB transferred, 60 requests
Critical::
Page weighs 10.6 MB (7.1 MB transferred)
Warning::
Images are 6.3 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 6.3 MB
Warning::
JavaScript is 571 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 571 KB
Info::
60 HTTP requests
Info::
Estimated 1.5 g CO2 per page load
7.1 MB / 2.4 MB budget
7.1 MB transferred
60 requests
1.5 g CO2 per page load
Images 6.3 MiB 88%
JavaScript 570.5 KiB 8%
Fonts 175.6 KiB 2%
CSS 51.7 KiB 1%
HTML 40.8 KiB 1%
Other 35.1 KiB 0%
Other 3.3 KiB 0%
Other 2.9 KiB 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

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 (7.1 MiB of 7.1 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
Page Weight Inventory
Action
60 resources · 7.1 MB · 228 KB savings available
FIX
60 resources · 7.1 MB · 228 KB savings available
Warning::
Page weight 6.1 MB over 1MB target
Got: 7.1 MB Expected: ≤ 1 MB
Info::
~228 KB of savings available
Warning::
59 third-party resources (100% of weight)
Info::
6 resources over 200KB
60 resources · 7.1 MiB · 59 third-party 6.1 MiB over 1MB target
Image 88% · 6.3 MiB
JavaScript 8% · 570.5 KiB
Font 2% · 175.6 KiB
CSS 1% · 55.6 KiB
Document 1% · 42.3 KiB
Other 0% · 33.8 KiB

~227.6 KiB of savings available

Remove unused JavaScript: 227.6 KiB
B
Image Optimization
18 images, 0 KB saveable
REVIEW
18 images, 0 KB saveable
Warning::
https://go.forrester.com/wp-content/themes/forrest... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
18 images 6.3 MB
0 oversized -0 KB
5 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

B
JS Execution Cost
556ms total JS execution
REVIEW
556ms total JS execution
Info::
https://www.forrester.com/bold/: 142ms CPU time
Info::
Unattributable: 132ms CPU time
Info::
https://go.forrester.com/wp-content/themes/forrest...: 127ms CPU time
Info::
https://www.googletagmanager.com/gtm.js?id=GTM-T4H...: 99ms CPU time
Info::
https://cdn.cookielaw.org/scripttemplates/202401.1...: 57ms CPU time
Warning::
Third-party scripts: 556ms (100% of total)

Main Thread Breakdown

Script Evaluation 41% Other 19% Style & Layout 18% Script Parsing & Compilation 13% Parse HTML & CSS 6%
ScriptTotalScriptingParse/CompileParty
https://www.forrester.com/bold/142ms7ms4ms3rd
Unattributable132ms27ms0ms3rd
https://go.forrester.com/wp-content/themes/forrester/assets/vendor/jquery.min.js?ver=3.6.1127ms79ms2ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-T4HT5SN99ms81ms15ms3rd
https://cdn.cookielaw.org/scripttemplates/202401.1.0/otBannerSdk.js57ms37ms11ms3rd
C
JS Bundles
Action
18 scripts, 228 KB unused
REVIEW
18 scripts, 228 KB unused
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-T4H...: 75 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.cookielaw.org/scripttemplates/202401.1...: 55 KB unused (53%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn.jsdelivr.net/npm/@lottiefiles/dotlotti...: 35 KB unused (99%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://go.forrester.com/wp-content/themes/forrest...: 35 KB unused (69%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn-0.d41.co/tags/ff/ff-4.min.js: 27 KB unused (57%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 228 KB
228 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtm.js?id=GTM-T4HT5SN183 KB75 KB (41%)✓3rd
https://cdn.cookielaw.org/scripttemplates/202401.1.0/otBannerSdk.js104 KB55 KB (53%)✓3rd
https://cdn.jsdelivr.net/npm/@lottiefiles/dotlottie-web/+esm36 KB35 KB (99%)✓3rd
https://go.forrester.com/wp-content/themes/forrester/assets/dist/js/core.min.js?ver=177679398152 KB35 KB (69%)✓3rd
https://cdn-0.d41.co/tags/ff/ff-4.min.js49 KB27 KB (57%)✓3rd
https://go.forrester.com/wp-content/themes/forrester/assets/vendor/slick.min.js?ver=1.8.113 KB—✓3rd
https://go.forrester.com/wp-content/themes/forrester/assets/vendor/jquery.validate.min.js?ver=6.9.49 KB—✓3rd
https://go.forrester.com/wp-content/themes/forrester/assets/dist/js/client-side-redirects.min.js?v=17767939812 KB—✓3rd
https://go.forrester.com/wp-content/themes/forrester/assets/vendor/jquery.min.js?ver=3.6.135 KB—✓3rd
blob:https://www.forrester.com/a87f4681-f4b2-4147-8b90-fb112dce47e1-0 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
6 fonts (176 KB)
PASS
6 fonts (176 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

176 KB total

Render-blocking

0

of 6

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 500 ms 1.0 s 1.5 s 2.0 s FCP 1.6 s LCP 1.9 shttps://use.typekit.net/af/efe4a5/00000000000000007735e609/30/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3l https://use.typekit.net/af/efe4a5/00000000000000007735e609/30/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3 — 29.3 KiB — 15 ms — font-display: swaphttps://use.typekit.net/af/2555e1/00000000000000007735e603/30/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3l https://use.typekit.net/af/2555e1/00000000000000007735e603/30/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3 — 30.2 KiB — 28 ms — font-display: swaphttps://use.typekit.net/af/78aca8/00000000000000007735e60d/30/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n6&v=3l https://use.typekit.net/af/78aca8/00000000000000007735e60d/30/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n6&v=3 — 29.3 KiB — 22 ms — font-display: swaphttps://go.forrester.com/wp-content/themes/forrester/assets/static/font/ivardisplay-regular-webfont.woff2ivardisplay-regular-web... https://go.forrester.com/wp-content/themes/forrester/assets/static/font/ivardisplay-regular-webfont.woff2 — 23.9 KiB — 31 ms — font-display: swaphttps://use.typekit.net/af/3322cc/00000000000000007735e616/30/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=i4&v=3l https://use.typekit.net/af/3322cc/00000000000000007735e616/30/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=i4&v=3 — 31.1 KiB — 31 ms — font-display: swaphttps://use.typekit.net/af/4de20a/00000000000000007735e604/30/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=i7&v=3l https://use.typekit.net/af/4de20a/00000000000000007735e604/30/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=i7&v=3 — 31.8 KiB — 40 ms — font-display: swap
l woff2 swap
Size 29 KB
Load time 15 ms
Start 763 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 30 KB
Load time 28 ms
Start 763 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 29 KB
Load time 22 ms
Start 763 ms
Risk FOUT — text flashes from fallback to web font
ivardisplay-regular-web... woff2 swap
Size 24 KB
Load time 31 ms
Start 764 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 31 KB
Load time 31 ms
Start 764 ms
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 32 KB
Load time 40 ms
Start 764 ms
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
HTTP Caching
max-age=86400 (1 day)
PASS
max-age=86400 (1 day)
Info::
Cache-Control header is set
Got: max-age=86400
Info::
Effective TTL: 1 day (max-age=86400)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=86400

DirectiveValueMeaning
max-age86400Cache for 1 day
Effective TTL: 86400 seconds
Network Waterfall
60 requests over 3585ms
INFO
0 ms 1.0 s 2.0 s 3.0 s FCP 1.6 s LCP 1.9 shttps://forrester.com// https://forrester.com/ — 301 — 211 B — 8 ms — h2https://www.forrester.com/www.forrester.com/ https://www.forrester.com/ — 302 — 701 B — 186 ms — h2https://www.forrester.com/boldwww.forrester.com/bold https://www.forrester.com/bold — 301 — 760 B — 167 ms — h2http://www.forrester.com/bold/www.forrester.com/bold/ http://www.forrester.com/bold/ — 307 — 0 B — 1 ms — http/1.1https://www.forrester.com/bold/www.forrester.com/bold/ https://www.forrester.com/bold/ — 200 — 40.8 KiB — 178 ms — h2https://go.forrester.com/wp-content/themes/forrester/assets/dist/js/client-side-redirects.min.js?v=1776793981go.forrester.com/wp-content/themes/... https://go.forrester.com/wp-content/themes/forrester/assets/dist/js/client-side-redirects.min.js?v=1776793981 — 200 — 1.5 KiB — 39 ms — h2https://go.forrester.com/wp-content/plugins/auth0/assets/css/main.css?ver=4.6.2go.forrester.com/wp-content/plugins... https://go.forrester.com/wp-content/plugins/auth0/assets/css/main.css?ver=4.6.2 — 200 — 698 B — 35 ms — h2https://go.forrester.com/wp-content/themes/forrester/assets/vendor/slick.css?ver=1.8.1go.forrester.com/wp-content/themes/... https://go.forrester.com/wp-content/themes/forrester/assets/vendor/slick.css?ver=1.8.1 — 200 — 856 B — 55 ms — h2https://go.forrester.com/wp-content/themes/forrester/assets/dist/css/core.min.css?ver=1776793981go.forrester.com/wp-content/themes/... https://go.forrester.com/wp-content/themes/forrester/assets/dist/css/core.min.css?ver=1776793981 — 200 — 48.6 KiB — 37 ms — h2https://cdn-0.d41.co/tags/ff/ff-4.min.jscdn-0.d41.co/tags/ff/ff-4.min.js https://cdn-0.d41.co/tags/ff/ff-4.min.js — 200 — 49.0 KiB — 16 ms — http/1.1https://go.forrester.com/wp-content/themes/forrester/assets/static/forrester_logo.svggo.forrester.com/wp-content/themes/... https://go.forrester.com/wp-content/themes/forrester/assets/static/forrester_logo.svg — 200 — 2.4 KiB — 33 ms — h2https://go.forrester.com/wp-content/uploads/2025/12/background-cover-image-green-1536x576.webpgo.forrester.com/wp-content/uploads... https://go.forrester.com/wp-content/uploads/2025/12/background-cover-image-green-1536x576.webp — 200 — 6.6 KiB — 165 ms — h2https://go.forrester.com/wp-content/uploads/2026/03/26Q1-WyW-Launch-HP-Hero.webpgo.forrester.com/wp-content/uploads... https://go.forrester.com/wp-content/uploads/2026/03/26Q1-WyW-Launch-HP-Hero.webp — 200 — 92.2 KiB — 24 ms — h2https://go.forrester.com/wp-content/uploads/2025/05/500000-Survey-Respondents.webpgo.forrester.com/wp-content/uploads... https://go.forrester.com/wp-content/uploads/2025/05/500000-Survey-Respondents.webp — 200 — 106.9 KiB — 24 ms — h2https://go.forrester.com/wp-content/plugins/duracelltomi-google-tag-manager/dist/js/gtm4wp-form-move-tracker.js?ver=1.22.3go.forrester.com/wp-content/plugins... https://go.forrester.com/wp-content/plugins/duracelltomi-google-tag-manager/dist/js/gtm4wp-form-move-tracker.js?ver=1.22.3 — 200 — 556 B — 26 ms — h2https://use.typekit.net/hks2ljb.cssuse.typekit.net/hks2ljb.css https://use.typekit.net/hks2ljb.css — 200 — 1.4 KiB — 19 ms — h2https://go.forrester.com/wp-content/themes/forrester/assets/vendor/jquery.min.js?ver=3.6.1go.forrester.com/wp-content/themes/... https://go.forrester.com/wp-content/themes/forrester/assets/vendor/jquery.min.js?ver=3.6.1 — 200 — 35.5 KiB — 25 ms — h2https://p.typekit.net/p.css?s=1&k=hks2ljb&ht=tk&f=137.138.139.140.169.170.171.172.173.174.175.176.5474.5475.25136.25137&a=137626260&app=typekit&e=cssp.typekit.net/p.css?s=1&k=hks2ljb&h... https://p.typekit.net/p.css?s=1&k=hks2ljb&ht=tk&f=137.138.139.140.169.170.171.172.173.174.175.176.5474.5475.25136.25137&a=137626260&app=typekit&e=css — 200 — 172 B — 36 ms — h2https://go.forrester.com/wp-content/themes/forrester/assets/vendor/slick.min.js?ver=1.8.1go.forrester.com/wp-content/themes/... https://go.forrester.com/wp-content/themes/forrester/assets/vendor/slick.min.js?ver=1.8.1 — 200 — 13.0 KiB — 24 ms — h2https://go.forrester.com/wp-content/themes/forrester/assets/vendor/jquery.validate.min.js?ver=6.9.4go.forrester.com/wp-content/themes/... https://go.forrester.com/wp-content/themes/forrester/assets/vendor/jquery.validate.min.js?ver=6.9.4 — 200 — 9.1 KiB — 25 ms — h2https://go.forrester.com/wp-content/themes/forrester/assets/dist/js/core.min.js?ver=1776793981go.forrester.com/wp-content/themes/... https://go.forrester.com/wp-content/themes/forrester/assets/dist/js/core.min.js?ver=1776793981 — 200 — 51.6 KiB — 25 ms — h2https://www.googletagmanager.com/gtm.js?id=GTM-T4HT5SNwww.googletagmanager.com/gtm.js?id=... https://www.googletagmanager.com/gtm.js?id=GTM-T4HT5SN — 200 — 183.2 KiB — 170 ms — h2data:image/svg+xml,%3Csvg width='16' height='16' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M5…www.w3.org/2000/svg'%3E%3Cpath d='M... data:image/svg+xml,%3Csvg width='16' height='16' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M5… — 200 — 0 B — 0 ms — datahttps://go.forrester.com/wp-content/themes/forrester/assets/static/svg/icon-search.svggo.forrester.com/wp-content/themes/... https://go.forrester.com/wp-content/themes/forrester/assets/static/svg/icon-search.svg — 200 — 635 B — 22 ms — h2data:image/svg+xml,%3Csvg width='11' height='7' xmlns='http://www.w3.org/2000/svg'%3E%3Cg stroke='%…www.w3.org/2000/svg'%3E%3Cg stroke=... data:image/svg+xml,%3Csvg width='11' height='7' xmlns='http://www.w3.org/2000/svg'%3E%3Cg stroke='%… — 200 — 0 B — 0 ms — datadata:image/svg+xml;charset=utf-8,%3Csvg viewBox='0 0 25 12' xmlns='http://www.w3.org/2000/svg'%3E%3…www.w3.org/2000/svg'%3E%3… data:image/svg+xml;charset=utf-8,%3Csvg viewBox='0 0 25 12' xmlns='http://www.w3.org/2000/svg'%3E%3… — 200 — 0 B — 0 ms — datahttps://go.forrester.com/wp-content/uploads/2026/04/Forrester-Decisions-image@2x-576x480.webpgo.forrester.com/wp-content/uploads... https://go.forrester.com/wp-content/uploads/2026/04/Forrester-Decisions-image@2x-576x480.webp — 200 — 42.4 KiB — 43 ms — h2https://use.typekit.net/af/efe4a5/00000000000000007735e609/30/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3use.typekit.net/af/efe4a5/000000000... https://use.typekit.net/af/efe4a5/00000000000000007735e609/30/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n4&v=3 — 200 — 29.3 KiB — 15 ms — h2https://use.typekit.net/af/2555e1/00000000000000007735e603/30/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3use.typekit.net/af/2555e1/000000000... https://use.typekit.net/af/2555e1/00000000000000007735e603/30/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n7&v=3 — 200 — 30.2 KiB — 28 ms — h2https://use.typekit.net/af/78aca8/00000000000000007735e60d/30/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n6&v=3use.typekit.net/af/78aca8/000000000... https://use.typekit.net/af/78aca8/00000000000000007735e60d/30/l?primer=7cdcb44be4a7db8877ffa5c0007b8dd865b3bbc383831fe2ea177f62257a9191&fvd=n6&v=3 — 200 — 29.3 KiB — 22 ms — h2
0 ms 1.0 s 2.0 s 3.0 s FCP 1.6 s LCP 1.9 shttps://forrester.com// https://forrester.com/ — 301 — 211 B — 8 ms — h2https://www.forrester.com/www.forrester.com/ https://www.forrester.com/ — 302 — 701 B — 186 ms — h2https://www.forrester.com/boldwww.forrester.com/bold https://www.forrester.com/bold — 301 — 760 B — 167 ms — h2http://www.forrester.com/bold/www.forrester.com/bold/ http://www.forrester.com/bold/ — 307 — 0 B — 1 ms — http/1.1https://www.forrester.com/bold/www.forrester.com/bold/ https://www.forrester.com/bold/ — 200 — 40.8 KiB — 178 ms — h2https://go.forrester.com/wp-content/themes/forrester/assets/dist/js/client-side-redirects.min.js?v=1776793981go.forrester.com/wp-content/themes/... https://go.forrester.com/wp-content/themes/forrester/assets/dist/js/client-side-redirects.min.js?v=1776793981 — 200 — 1.5 KiB — 39 ms — h2https://go.forrester.com/wp-content/plugins/auth0/assets/css/main.css?ver=4.6.2go.forrester.com/wp-content/plugins... 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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 556ms · 364KB · $7/mo
www.forrester.com
Other
Optional
Execution 142ms
Transfer 41 KB
Monthly Cost $2/mo
Unattributable
Other
Optional
Execution 132ms
Transfer 0 KB
Monthly Cost $2/mo
go.forrester.com
Other
Optional
Execution 127ms
Transfer 35 KB
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 99ms
Transfer 183 KB
Unused 41%
Monthly Cost $1/mo
OneTrust
Consent
Essential
Execution 57ms
Transfer 104 KB
Unused 53%
Monthly Cost $1/mo

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

53% of OneTrust'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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