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https://forrester.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
84
GRADE
B
FIX
2
REVIEW
4
PASS
9
INFO
2

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

Mobile Desktop
55
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.
96
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.

5.50 s

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

6.14 s

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

374 ms

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

0.011

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

5.50 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.

10.74 s

Page Load Progression

375 ms
750 ms
1.1 s
1.5 s
1.9 s
2.2 s
2.6 s
3.0 s
Checks
17
9 PASS 4 REVIEW 2 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 (1000.7 KiB of 1000.9 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
D
JS Execution Cost
Action
2127ms total JS execution
FIX
2127ms total JS execution
Warning::
https://www.forrester.com/ruxitagentjs_ICANVfqru_1...: 475ms CPU time
Warning::
https://www.forrester.com/bold/: 468ms CPU time
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-T4H...: 400ms CPU time
Warning::
https://go.forrester.com/wp-content/themes/forrest...: 325ms CPU time
Info::
Unattributable: 242ms CPU time
Warning::
Third-party scripts: 2127ms (100% of total)

Main Thread Breakdown

Script Evaluation 49% Other 14% Style & Layout 14% Script Parsing & Compilation 13% Parse HTML & CSS 6%
ScriptTotalScriptingParse/CompileParty
https://www.forrester.com/ruxitagentjs_ICANVfqru_10335260306043831.js475ms399ms14ms3rd
https://www.forrester.com/bold/468ms36ms23ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-T4HT5SN400ms329ms61ms3rd
https://go.forrester.com/wp-content/themes/forrester/assets/vendor/jquery.min.js?ver=3.6.1325ms210ms12ms3rd
Unattributable242ms10ms0ms3rd
https://img.en25.com/Web/Forrester/%7B23c79f58-08a9-49f2-a2ec-2e63b7e11d4d%7D_zipsicdata.js?callback=zipsicdata&_=1776803314568157ms11ms145ms3rd
https://go.forrester.com/wp-content/themes/forrester/assets/dist/js/core.min.js?ver=177679398161ms45ms14ms3rd
B
Image Optimization
8 images, 0 KB saveable
REVIEW
8 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.
8 images 207 KB
0 oversized -0 KB
3 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
JS Bundles
Action
18 scripts, 202 KB unused
REVIEW
18 scripts, 202 KB unused
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-T4H...: 76 KB unused (41%)
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://www.forrester.com/ruxitagentjs_ICANVfqru_1...: 28 KB unused (40%)
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: 202 KB
202 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtm.js?id=GTM-T4HT5SN183 KB76 KB (41%)✓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://www.forrester.com/ruxitagentjs_ICANVfqru_10335260306043831.js70 KB28 KB (40%)✓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/jquery.min.js?ver=3.6.136 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/vendor/slick.min.js?ver=1.8.113 KB—✓3rd
https://go.forrester.com/wp-content/plugins/duracelltomi-google-tag-manager/dist/js/gtm4wp-form-move-tracker.js?ver=1.22.30 KB—✓3rd
https://go.forrester.com/wp-content/themes/forrester/assets/dist/js/client-side-redirects.min.js?v=17767939812 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

B
Page Weight Inventory
45 resources · 1001 KB · 202 KB savings available
REVIEW
45 resources · 1001 KB · 202 KB savings available
Info::
Within 1MB page-weight target
Got: 1001 KB
Info::
~202 KB of savings available
Warning::
44 third-party resources (100% of weight)
45 resources · 1000.9 KiB · 44 third-party Within 1MB page-weight target
JavaScript 53% · 527.2 KiB
Image 21% · 208.5 KiB
Font 18% · 175.6 KiB
CSS 5% · 51.7 KiB
Document 4% · 37.0 KiB
Other 0% · 952 B

~201.7 KiB of savings available

Remove unused JavaScript: 201.7 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A
Page Weight Budget
1001 KB transferred, 45 requests
PASS
1001 KB transferred, 45 requests
Info::
Page weighs 4.1 MB (1001 KB transferred)
Warning::
JavaScript is 527 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 527 KB
Info::
45 HTTP requests
Info::
Estimated 0.20 g CO2 per page load
1001 KB / 2.4 MB budget
1001 KB transferred
45 requests
0.20 g CO2 per page load
JavaScript 527.2 KiB 53%
Images 206.9 KiB 21%
Fonts 175.6 KiB 18%
CSS 51.7 KiB 5%
HTML 34.8 KiB 3%
Other 4.0 KiB 0%
Other 741 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

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 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 5.5 s LCP 6.1 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 — 23 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 — 24 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 — 29 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 — 53 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 — 27 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 — 25 ms — font-display: swap
l woff2 swap
Size 29 KB
Load time 23 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 29 KB
Load time 24 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 30 KB
Load time 29 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
ivardisplay-regular-web... woff2 swap
Size 24 KB
Load time 53 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 31 KB
Load time 27 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
l woff2 swap
Size 32 KB
Load time 25 ms
Start 1.1 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
1 hints, 0 missing preconnects
PASS
1 hints, 0 missing preconnects
Info::
Page uses 1 resource hint(s)

Current Resource Hints

preconnect
—
preload
—
dns-prefetch
1
prefetch
—

1 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
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
45 requests over 6399ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 5.5 s LCP 6.1 shttps://forrester.com// https://forrester.com/ — 301 — 211 B — 10 ms — h2https://www.forrester.com/www.forrester.com/ https://www.forrester.com/ — 302 — 852 B — 147 ms — h2https://www.forrester.com/boldwww.forrester.com/bold https://www.forrester.com/bold — 301 — 837 B — 159 ms — h2http://www.forrester.com/bold/www.forrester.com/bold/ http://www.forrester.com/bold/ — 307 — 0 B — 0 ms — http/1.1https://www.forrester.com/bold/www.forrester.com/bold/ https://www.forrester.com/bold/ — 200 — 34.8 KiB — 154 ms — h2https://www.forrester.com/ruxitagentjs_ICANVfqru_10335260306043831.jswww.forrester.com/ruxitagentjs_ICAN... https://www.forrester.com/ruxitagentjs_ICANVfqru_10335260306043831.js — 200 — 70.3 KiB — 7 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 — 113 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 — 85 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 — 825 B — 108 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 — 215 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 — 41 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 — 108 ms — h2https://go.forrester.com/wp-content/uploads/2025/12/background-cover-image-green-768x288.webpgo.forrester.com/wp-content/uploads... https://go.forrester.com/wp-content/uploads/2025/12/background-cover-image-green-768x288.webp — 200 — 4.3 KiB — 207 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 — 48 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 — 51 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 — 510 B — 24 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 — 54 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 — 12.9 KiB — 47 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://use.typekit.net/hks2ljb.cssuse.typekit.net/hks2ljb.css https://use.typekit.net/hks2ljb.css — 200 — 1.4 KiB — 218 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 — 47 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 — 51 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 — 159 ms — h2https://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 — 548 B — 151 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://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 — 23 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 — 24 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 — 29 ms — h2https://go.forrester.com/wp-content/themes/forrester/assets/static/font/ivardisplay-regular-webfont.woff2go.forrester.com/wp-content/themes/... https://go.forrester.com/wp-content/themes/forrester/assets/static/font/ivardisplay-regular-webfont.woff2 — 200 — 23.9 KiB — 53 ms — h2
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 5.5 s LCP 6.1 shttps://forrester.com// https://forrester.com/ — 301 — 211 B — 10 ms — h2https://www.forrester.com/www.forrester.com/ https://www.forrester.com/ — 302 — 852 B — 147 ms — h2https://www.forrester.com/boldwww.forrester.com/bold https://www.forrester.com/bold — 301 — 837 B — 159 ms — h2http://www.forrester.com/bold/www.forrester.com/bold/ http://www.forrester.com/bold/ — 307 — 0 B — 0 ms — http/1.1https://www.forrester.com/bold/www.forrester.com/bold/ https://www.forrester.com/bold/ — 200 — 34.8 KiB — 154 ms — h2https://www.forrester.com/ruxitagentjs_ICANVfqru_10335260306043831.jswww.forrester.com/ruxitagentjs_ICAN... https://www.forrester.com/ruxitagentjs_ICANVfqru_10335260306043831.js — 200 — 70.3 KiB — 7 ms — h2https://go.forrester.com/wp-content/themes/forrester/assets/dist/js/client-side-redirects.min.js?v=1776793981go.forrester.com/wp-content/themes/... 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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 2127ms · 439KB · $28/mo
www.forrester.com
Other
Costly
Execution 475ms
Transfer 70 KB
Unused 40%
Monthly Cost $6/mo
www.forrester.com
Other
Costly
Execution 468ms
Transfer 35 KB
Monthly Cost $6/mo
Google Tag Manager
Tag Manager
Costly
Execution 400ms
Transfer 183 KB
Unused 41%
Monthly Cost $5/mo
go.forrester.com
Other
Costly
Execution 325ms
Transfer 36 KB
Monthly Cost $4/mo
Unattributable
Other
Costly
Execution 242ms
Transfer 0 KB
Monthly Cost $3/mo
img.en25.com
Other
Optional
Execution 157ms
Transfer 64 KB
Monthly Cost $2/mo
go.forrester.com
Other
Optional
Execution 61ms
Transfer 52 KB
Unused 69%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.forrester.com adds 475ms and costs ~$6/month
  • www.forrester.com adds 468ms and costs ~$6/month
  • Google Tag Manager adds 400ms and costs ~$5/month
  • go.forrester.com adds 325ms and costs ~$4/month
  • Unattributable adds 242ms 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.forrester.com takes 475ms 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.forrester.com takes 468ms 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 400ms 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

go.forrester.com takes 325ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

This script has high main-thread execution time — optimize hot paths or defer.

Source: web.dev

Unattributable takes 242ms 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

69% of go.forrester.com'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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