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https://thisoldhouse.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
87
GRADE
B
FIX
1
REVIEW
4
PASS
10
INFO
2

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

Mobile Desktop
77
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.
100
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.

3.43 s

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

4.19 s

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

128 ms

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

0.070

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

3.43 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.

6.91 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
17
10 PASS 4 REVIEW 1 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 (660.9 KiB of 661.5 KiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
C
Image Optimization
Action
45 images, 0 KB saveable
REVIEW
45 images, 0 KB saveable
Warning::
data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAT4A... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://ey2msiqxj7z.exactdn.com/wp-content/uploads... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://ey2msiqxj7z.exactdn.com/wp-content/uploads... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://ey2msiqxj7z.exactdn.com/wp-content/uploads... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.thisoldhouse.com/wp-content/themes/thi... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://ey2msiqxj7z.exactdn.com/wp-content/uploads... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
45 images 214 KB
0 oversized -0 KB
11 legacy format
6 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

C
JS Execution Cost
Action
1889ms total JS execution
REVIEW
1889ms total JS execution
Warning::
https://www.thisoldhouse.com/: 673ms CPU time
Warning::
https://www.thisoldhouse.com/wp-includes/js/jquery...: 462ms CPU time
Warning::
Unattributable: 336ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-PHC8...: 252ms CPU time
Info::
https://www.thisoldhouse.com/wp-content/plugins/ew...: 111ms CPU time
Warning::
Third-party scripts: 1889ms (100% of total)

Main Thread Breakdown

Script Evaluation 33% Style & Layout 26% Other 24% Rendering 6% Parse HTML & CSS 5% Script Parsing & Compilation 5%
ScriptTotalScriptingParse/CompileParty
https://www.thisoldhouse.com/673ms25ms22ms3rd
https://www.thisoldhouse.com/wp-includes/js/jquery/jquery.min.js?ver=1.0462ms292ms10ms3rd
Unattributable336ms11ms0ms3rd
https://www.googletagmanager.com/gtag/js?id=G-PHC8NT45WF252ms192ms40ms3rd
https://www.thisoldhouse.com/wp-content/plugins/ewww-image-optimizer/includes/lazysizes.min.js?ver=841111ms61ms2ms3rd
https://scripts.simpleanalyticscdn.com/latest.js54ms23ms1ms3rd
B
JS Bundles
19 scripts, 65 KB unused
REVIEW
19 scripts, 65 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-PHC8...: 65 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 65 KB
65 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-PHC8NT45WF152 KB65 KB (43%)✓3rd
https://www.thisoldhouse.com/wp-content/plugins/multidots-custom-blocks/assets/js/nh-data.js?ver=1.0.42 KB—✓3rd
https://www.thisoldhouse.com/wp-includes/js/jquery/ui/core.min.js?ver=1.13.38 KB—✓3rd
https://www.thisoldhouse.com/wp-content/plugins/toh-ads-management/assets/js/toh-gam-script.min.js?ver=1.1.0.24 KB—✓3rd
https://scripts.simpleanalyticscdn.com/latest.js5 KB—✓3rd
https://www.thisoldhouse.com/wp-includes/js/jquery/jquery.min.js?ver=1.033 KB—✓3rd
https://www.thisoldhouse.com/wp-content/plugins/multidots-custom-blocks/assets/js/slick.min.js?ver=1.0.012 KB—✓3rd
https://www.thisoldhouse.com/wp-content/plugins/multidots-custom-blocks/assets/js/slick.js?ver=1.0.02 KB—✓3rd
https://cdn.cookielaw.org/consent/f58a413d-ef67-468f-943e-677ae4c22344/OtAutoBlock.js0 KB—✓3rd
https://www.thisoldhouse.com/wp-content/plugins/breeze/assets/js/js-front-end/breeze-prefetch-links.min.js?ver=2.4.21 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

C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

A+
Page Weight Budget
661 KB transferred, 81 requests
PASS
661 KB transferred, 81 requests
Info::
Page weighs 1.7 MB (661 KB transferred)
Info::
81 HTTP requests
Info::
Estimated 0.14 g CO2 per page load
661 KB / 2.4 MB budget
661 KB transferred
81 requests
0.14 g CO2 per page load
JavaScript 244.4 KiB 37%
Images 213.9 KiB 32%
Fonts 81.3 KiB 12%
HTML 75.9 KiB 11%
CSS 41.8 KiB 6%
Other 2.6 KiB 0%
Other 591 B 0%
Other 552 B 0%
Other 528 B 0%
0 2.4 MB 4.9 MB
Under budget
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 (81 KB)
PASS
5 fonts (81 KB)
Info::
5 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

5

81 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 1.0 s 2.0 s 3.0 s 4.0 s FCP 3.4 s LCP 4.2 shttps://fonts.gstatic.com/s/sarabun/v17/DtVjJx26TKEr37c9aBVJn3YO5gg.woff2DtVjJx26TKEr37c9aBVJn3Y... https://fonts.gstatic.com/s/sarabun/v17/DtVjJx26TKEr37c9aBVJn3YO5gg.woff2 — 11.2 KiB — 35 ms — font-display: swaphttps://fonts.gstatic.com/s/notoserif/v33/ga6daw1J5X9T9RW6j9bNVls-hfgvz8JcMofYTYf6D33WsNFH.woff2ga6daw1J5X9T9RW6j9bNVls... https://fonts.gstatic.com/s/notoserif/v33/ga6daw1J5X9T9RW6j9bNVls-hfgvz8JcMofYTYf6D33WsNFH.woff2 — 35.9 KiB — 74 ms — font-display: swaphttps://fonts.gstatic.com/s/sarabun/v17/DtVmJx26TKEr37c9YMptilss6yLUrwA.woff2DtVmJx26TKEr37c9YMptils... https://fonts.gstatic.com/s/sarabun/v17/DtVmJx26TKEr37c9YMptilss6yLUrwA.woff2 — 11.4 KiB — 44 ms — font-display: swaphttps://fonts.gstatic.com/s/sarabun/v17/DtVmJx26TKEr37c9YK5silss6yLUrwA.woff2DtVmJx26TKEr37c9YK5sils... https://fonts.gstatic.com/s/sarabun/v17/DtVmJx26TKEr37c9YK5silss6yLUrwA.woff2 — 11.4 KiB — 54 ms — font-display: swaphttps://fonts.gstatic.com/s/sarabun/v17/DtVmJx26TKEr37c9YOZqilss6yLUrwA.woff2DtVmJx26TKEr37c9YOZqils... https://fonts.gstatic.com/s/sarabun/v17/DtVmJx26TKEr37c9YOZqilss6yLUrwA.woff2 — 11.5 KiB — 66 ms — font-display: swap
DtVjJx26TKEr37c9aBVJn3Y... woff2 swap
Size 11 KB
Load time 35 ms
Start 1.0 s
Risk FOUT — text flashes from fallback to web font
ga6daw1J5X9T9RW6j9bNVls... woff2 swap
Size 36 KB
Load time 74 ms
Start 1.0 s
Risk FOUT — text flashes from fallback to web font
DtVmJx26TKEr37c9YMptils... woff2 swap
Size 11 KB
Load time 44 ms
Start 1.0 s
Risk FOUT — text flashes from fallback to web font
DtVmJx26TKEr37c9YK5sils... woff2 swap
Size 11 KB
Load time 54 ms
Start 1.0 s
Risk FOUT — text flashes from fallback to web font
DtVmJx26TKEr37c9YOZqils... woff2 swap
Size 11 KB
Load time 66 ms
Start 1.0 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
10 hints, 0 missing preconnects
PASS
10 hints, 0 missing preconnects
Info::
Page uses 10 resource hint(s)

Current Resource Hints

preconnect
5
preload
1
dns-prefetch
4
prefetch
—

10 resource hints configured

A
Page Weight Inventory
81 resources · 661 KB · 65 KB savings available
PASS
81 resources · 661 KB · 65 KB savings available
Info::
Within 1MB page-weight target
Got: 661 KB
Info::
~65 KB of savings available
Warning::
80 third-party resources (100% of weight)
81 resources · 661.5 KiB · 80 third-party Within 1MB page-weight target
JavaScript 37% · 244.4 KiB
Image 33% · 215.9 KiB
Font 12% · 81.3 KiB
Document 12% · 76.5 KiB
CSS 6% · 41.8 KiB
Other 0% · 1.6 KiB

~64.9 KiB of savings available

Remove unused JavaScript: 64.9 KiB
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=3600 (1 hour)
PASS
max-age=3600 (1 hour)
Info::
Cache-Control header is set
Got: max-age=3600
Info::
Effective TTL: 1 hour (max-age=3600)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=3600

DirectiveValueMeaning
max-age3600Cache for 1 hour
Effective TTL: 3600 seconds
Network Waterfall
81 requests over 2610ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s FCP 3.4 s LCP 4.2 shttps://thisoldhouse.com// https://thisoldhouse.com/ — 301 — 632 B — 540 ms — h2https://www.thisoldhouse.com/www.thisoldhouse.com/ https://www.thisoldhouse.com/ — 200 — 75.9 KiB — 292 ms — h2https://cdn.cookielaw.org/consent/f58a413d-ef67-468f-943e-677ae4c22344/OtAutoBlock.jscdn.cookielaw.org/consent/f58a413d-... https://cdn.cookielaw.org/consent/f58a413d-ef67-468f-943e-677ae4c22344/OtAutoBlock.js — -1 — 0 B — 95 ms — https://cdn.cookielaw.org/scripttemplates/otSDKStub.jscdn.cookielaw.org/scripttemplates/o... https://cdn.cookielaw.org/scripttemplates/otSDKStub.js — -1 — 0 B — 96 ms — https://www.thisoldhouse.com/wp-content/themes/thisoldhouse/assets/images/header-bg-new-img.svgwww.thisoldhouse.com/wp-content/the... https://www.thisoldhouse.com/wp-content/themes/thisoldhouse/assets/images/header-bg-new-img.svg — 200 — 4.6 KiB — 173 ms — h2https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@100;200;300;400;500;600;700&family=IBM+Plex+Sans+Condensed:wght@400;500;700&family=Fira+Sans:wght@300;400;500;600;700;800&family=Sarabun:wght@400;500;600;700&family=Noto+Serif:wght@400;500;600;700&display=swapfonts.googleapis.com/css2?family=IB... https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@100;200;300;400;500;600;700&family=IBM+Plex+Sans+Condensed:wght@400;500;700&family=Fira+Sans:wght@300;400;500;600;700;800&family=Sarabun:wght@400;500;600;700&family=Noto+Serif:wght@400;500;600;700&display=swap — 200 — 2.8 KiB — 101 ms — h2https://www.thisoldhouse.com/wp-content/themes/thisoldhouse/assets/build/css/main.css?ver=1.2.1www.thisoldhouse.com/wp-content/the... https://www.thisoldhouse.com/wp-content/themes/thisoldhouse/assets/build/css/main.css?ver=1.2.1 — 200 — 23.2 KiB — 177 ms — h2https://www.thisoldhouse.com/wp-content/themes/thisoldhouse/assets/css/theme-common-style.min.css?ver=1.2.1www.thisoldhouse.com/wp-content/the... https://www.thisoldhouse.com/wp-content/themes/thisoldhouse/assets/css/theme-common-style.min.css?ver=1.2.1 — 200 — 12.6 KiB — 184 ms — h2https://www.thisoldhouse.com/wp-content/plugins/breeze/assets/js/js-front-end/breeze-prefetch-links.min.js?ver=2.4.2www.thisoldhouse.com/wp-content/plu... https://www.thisoldhouse.com/wp-content/plugins/breeze/assets/js/js-front-end/breeze-prefetch-links.min.js?ver=2.4.2 — 200 — 1.0 KiB — 182 ms — h2https://www.thisoldhouse.com/wp-content/plugins/toh-ads-management/assets/js/toh-gam-script.min.js?ver=1.1.0.2www.thisoldhouse.com/wp-content/plu... https://www.thisoldhouse.com/wp-content/plugins/toh-ads-management/assets/js/toh-gam-script.min.js?ver=1.1.0.2 — 200 — 4.4 KiB — 183 ms — h2https://www.thisoldhouse.com/wp-content/plugins/multidots-core/assets/css/project-plans.css?ver=1.0.2www.thisoldhouse.com/wp-content/plu... https://www.thisoldhouse.com/wp-content/plugins/multidots-core/assets/css/project-plans.css?ver=1.0.2 — 200 — 2.5 KiB — 179 ms — h2https://www.thisoldhouse.com/wp-content/cache/perfmatters/www.thisoldhouse.com/minify/f38b2db10e01.slick.min.css?ver=6.9.4www.thisoldhouse.com/wp-content/cac... https://www.thisoldhouse.com/wp-content/cache/perfmatters/www.thisoldhouse.com/minify/f38b2db10e01.slick.min.css?ver=6.9.4 — 200 — 667 B — 180 ms — h2https://ey2msiqxj7z.exactdn.com/wp-content/uploads/2026/04/13140730/TOH-4720-ARCHIVE.jpg?strip=all&resize=696,464ey2msiqxj7z.exactdn.com/wp-content/... https://ey2msiqxj7z.exactdn.com/wp-content/uploads/2026/04/13140730/TOH-4720-ARCHIVE.jpg?strip=all&resize=696,464 — 200 — 32.2 KiB — 15 ms — h2https://ey2msiqxj7z.exactdn.com/wp-content/uploads/2026/04/13150622/ASK-2420-ARCHIVE.jpg?strip=all&resize=398,224ey2msiqxj7z.exactdn.com/wp-content/... https://ey2msiqxj7z.exactdn.com/wp-content/uploads/2026/04/13150622/ASK-2420-ARCHIVE.jpg?strip=all&resize=398,224 — 200 — 6.3 KiB — 10 ms — h2https://ey2msiqxj7z.exactdn.com/wp-content/uploads/2026/03/31130821/TFH_Trailer_PreLaunch_032726_FINAL.jpg?strip=all&resize=398,224ey2msiqxj7z.exactdn.com/wp-content/... https://ey2msiqxj7z.exactdn.com/wp-content/uploads/2026/03/31130821/TFH_Trailer_PreLaunch_032726_FINAL.jpg?strip=all&resize=398,224 — 200 — 10.9 KiB — 25 ms — h2https://ey2msiqxj7z.exactdn.com/wp-content/uploads/2023/04/13152716/0123_WS_Upkeep_Deck-2-scaled.jpg?strip=all&resize=345,230ey2msiqxj7z.exactdn.com/wp-content/... https://ey2msiqxj7z.exactdn.com/wp-content/uploads/2023/04/13152716/0123_WS_Upkeep_Deck-2-scaled.jpg?strip=all&resize=345,230 — 200 — 14.0 KiB — 18 ms — h2https://ey2msiqxj7z.exactdn.com/wp-content/uploads/2022/02/13162531/Patio_iStock_472209167-1-scaled.jpg?strip=all&resize=345,230ey2msiqxj7z.exactdn.com/wp-content/... https://ey2msiqxj7z.exactdn.com/wp-content/uploads/2022/02/13162531/Patio_iStock_472209167-1-scaled.jpg?strip=all&resize=345,230 — 200 — 20.0 KiB — 12 ms — h2https://scripts.simpleanalyticscdn.com/latest.jsscripts.simpleanalyticscdn.com/late... https://scripts.simpleanalyticscdn.com/latest.js — 200 — 4.8 KiB — 49 ms — h2https://www.thisoldhouse.com/wp-includes/js/jquery/jquery.min.js?ver=1.0www.thisoldhouse.com/wp-includes/js... https://www.thisoldhouse.com/wp-includes/js/jquery/jquery.min.js?ver=1.0 — 200 — 32.9 KiB — 96 ms — h2https://www.thisoldhouse.com/wp-content/plugins/multidots-custom-blocks/assets/js/slick.min.js?ver=1.0.0www.thisoldhouse.com/wp-content/plu... https://www.thisoldhouse.com/wp-content/plugins/multidots-custom-blocks/assets/js/slick.min.js?ver=1.0.0 — 200 — 11.7 KiB — 95 ms — h2https://www.thisoldhouse.com/wp-json/toh/v1/user-state-codewww.thisoldhouse.com/wp-json/toh/v1... https://www.thisoldhouse.com/wp-json/toh/v1/user-state-code — 200 — 591 B — 453 ms — h2https://www.thisoldhouse.com/wp-content/plugins/multidots-custom-blocks/assets/js/slick.js?ver=1.0.0www.thisoldhouse.com/wp-content/plu... https://www.thisoldhouse.com/wp-content/plugins/multidots-custom-blocks/assets/js/slick.js?ver=1.0.0 — 200 — 1.6 KiB — 93 ms — h2https://www.thisoldhouse.com/wp-content/plugins/multidots-custom-blocks/assets/js/nh-data.js?ver=1.0.4www.thisoldhouse.com/wp-content/plu... https://www.thisoldhouse.com/wp-content/plugins/multidots-custom-blocks/assets/js/nh-data.js?ver=1.0.4 — 200 — 1.6 KiB — 94 ms — h2https://www.thisoldhouse.com/wp-content/plugins/multidots-core/assets/js/core.js?ver=1.0.10www.thisoldhouse.com/wp-content/plu... https://www.thisoldhouse.com/wp-content/plugins/multidots-core/assets/js/core.js?ver=1.0.10 — 200 — 2.9 KiB — 95 ms — 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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 1889ms · 272KB · $25/mo
www.thisoldhouse.com
Other
Costly
Execution 673ms
Transfer 76 KB
Monthly Cost $9/mo
www.thisoldhouse.com
Other
Costly
Execution 462ms
Transfer 33 KB
Monthly Cost $6/mo
Unattributable
Other
Costly
Execution 336ms
Transfer 0 KB
Monthly Cost $4/mo
Google Tag Manager
Tag Manager
Costly
Execution 252ms
Transfer 152 KB
Unused 43%
Monthly Cost $3/mo
www.thisoldhouse.com
Other
Optional
Execution 111ms
Transfer 7 KB
Monthly Cost $1/mo
scripts.simpleanalyticscdn.com
Other
Optional
Execution 54ms
Transfer 5 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.thisoldhouse.com adds 673ms and costs ~$9/month
  • www.thisoldhouse.com adds 462ms and costs ~$6/month
  • Unattributable adds 336ms and costs ~$4/month
  • Google Tag Manager adds 252ms 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.thisoldhouse.com takes 673ms 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.thisoldhouse.com takes 462ms 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 336ms 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 252ms 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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