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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
74
GRADE
C
FIX
4
REVIEW
3
PASS
8
INFO
2

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

Mobile Desktop
44
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.

3.51 s

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

6.46 s

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

1.26 s

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

0.067

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

3.51 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.

14.36 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
8 PASS 3 REVIEW 4 FIX
D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (1.8 MiB of 1.8 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
3866ms total JS execution
FIX
3866ms total JS execution
Warning::
https://www.nlr.gov/: 866ms CPU time
Warning::
Unattributable: 659ms CPU time
Warning::
https://scripts.clarity.ms/0.8.59/clarity.js: 414ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-D36B...: 364ms CPU time
Warning::
https://www.googletagmanager.com/gtag/js?id=G-CSLL...: 350ms CPU time
Warning::
Third-party scripts: 3866ms (100% of total)

Main Thread Breakdown

Script Evaluation 50% Style & Layout 17% Other 17% Script Parsing & Compilation 12%
ScriptTotalScriptingParse/CompileParty
https://www.nlr.gov/866ms124ms2ms3rd
Unattributable659ms25ms0ms3rd
https://scripts.clarity.ms/0.8.59/clarity.js414ms361ms10ms3rd
https://www.googletagmanager.com/gtag/js?id=G-D36B6EXMET&cx=c&gtm=4e64h1h1364ms259ms102ms3rd
https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64h1h1350ms293ms53ms3rd
https://www.googletagmanager.com/gtag/js?id=G-HFDNVE0DSC&cx=c&gtm=4e64h1h1294ms233ms58ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KG7PVKB284ms217ms51ms3rd
https://cdn.insight.sitefinity.com/sdk/sitefinity-insight-client.min.3.1.44.js190ms177ms6ms3rd
https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L123ms33ms89ms3rd
https://platform-api.sharethis.com/js/sharethis.js89ms38ms46ms3rd

Showing top 10 of 13 scripts

D
JS Bundles
Action
17 scripts, 413 KB unused
FIX
17 scripts, 413 KB unused
Warning::
https://www.googletagmanager.com/gtag/js?id=G-CSLL...: 106 KB unused (72%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-HFDN...: 63 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-KG7...: 63 KB unused (47%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-D36B...: 63 KB unused (40%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-CSLL...: 63 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 413 KB
413 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L147 KB106 KB (72%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-HFDNVE0DSC&cx=c&gtm=4e64h1h1153 KB63 KB (41%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-KG7PVKB134 KB63 KB (47%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-D36B6EXMET&cx=c&gtm=4e64h1h1156 KB63 KB (40%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-CSLL4ZEK4L&cx=c&gtm=4e64h1h1147 KB63 KB (43%)✓3rd
https://www.nlr.gov/ResourcePackages/Frontend/public/library/js/main.js?v=63912320702000000041 KB28 KB (75%)✗3rd
https://platform-api.sharethis.com/js/sharethis.js47 KB27 KB (58%)✗3rd
https://www.nlr.gov/WebResource.axd?d=NjxTqR2bqTw1rewxxlkHPt6cijkQaCjNkiPh9I9w1E-8BeJ-kZETMRXj4nZK_H6YkqrVMeS0B6NGR0r2FuV60b_1Juu6Dn6NvjIhdc11iGaYyfFDsEa-uyeQV9oMMQTnvaTIOzr4N29UE1lZ-wTgO2Ss4tp2-G_omzpnogtQU0k_8MT2HbXwAefctxT1Tx7Wt1b8H-pG-CeTxEpSe21HFuqlSQcgKpRMiwkCtCCDR1Q1&t=6388757259400000005 KB—✓3rd
https://cdn.insight.sitefinity.com/sdk/sitefinity-insight-client.min.3.1.44.js11 KB—✓3rd
https://www.nlr.gov/WebResource.axd?d=HtQyXelCu6mzSPcVcvK_BjykPDToej-LFGyQsm-N8BbLjg4wqt3TLM6utk15Ex8EbS0bUgTJRZ_3vHQ60kzHEseebs5B7RNbkWk9fQSC_3-Mb4YXAUtSZNZ13O2u6paKG_Ff4UoMNNKRdD-Osbk5FG8WPycT7wA79QOiS6sMmMO3ogxM7wS0D7jDR6MtTzMW5w1aqTpEzWn8DypUeJ3d6WXHnMQKLDOXOht83U0YmkM1&t=6388757253400000005 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
58 resources · 1.8 MB · 413 KB savings available
FIX
58 resources · 1.8 MB · 413 KB savings available
Warning::
Page weight 800 KB over 1MB target
Got: 1.8 MB Expected: ≤ 1 MB
Info::
~413 KB of savings available
Warning::
57 third-party resources (100% of weight)
58 resources · 1.8 MiB · 57 third-party 800.2 KiB over 1MB target
JavaScript 50% · 906.0 KiB
Image 29% · 530.4 KiB
CSS 11% · 194.5 KiB
Font 9% · 171.4 KiB
Document 1% · 14.3 KiB
Other 0% · 7.7 KiB

~412.8 KiB of savings available

Remove unused JavaScript: 412.8 KiB
C
Page Weight Budget
Action
1.8 MB transferred, 58 requests
REVIEW
1.8 MB transferred, 58 requests
Info::
Page weighs 5.1 MB (1.8 MB transferred)
Warning::
JavaScript is 906 KB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 906 KB
Info::
58 HTTP requests
Info::
Estimated 0.37 g CO2 per page load
1.8 MB / 2.4 MB budget
1.8 MB transferred
58 requests
0.37 g CO2 per page load
JavaScript 906.0 KiB 50%
Images 512.6 KiB 28%
Fonts 171.4 KiB 9%
CSS 100.6 KiB 6%
Other 94.5 KiB 5%
Other 20.8 KiB 1%
HTML 12.5 KiB 1%
Other 3.3 KiB 0%
Other 2.5 KiB 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Approaching limit

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

C
Image Optimization
Action
10 images, 0 KB saveable
REVIEW
10 images, 0 KB saveable
Warning::
https://www.nlr.gov/images/libraries/global/hp-ene... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.nlr.gov/ResourcePackages/Frontend/publ... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.nlr.gov/images/libraries/global/allian... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.nlr.gov/images/libraries/global/hp-dat... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.nlr.gov/images/libraries/global/hp-fin... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
10 images 513 KB
0 oversized -0 KB
6 legacy format
5 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

B
HTTP Caching
public, max-age=0, s-maxage=7200
REVIEW
public, max-age=0, s-maxage=7200
Info::
Cache-Control header is set
Got: public, max-age=0, s-maxage=7200
Info::
CDN TTL: 2 hours (s-maxage=7200)
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

public, max-age=0, s-maxage=7200

DirectiveValueMeaning
public—Any cache may store this response
max-age0Cache for 0 seconds
s-maxage7200CDN caches for 2 hours
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
8 fonts (171 KB)
PASS
8 fonts (171 KB)
Info::
8 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

8

171 KB total

Render-blocking

0

of 8

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 3.5 s LCP 6.5 shttps://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v51/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 36.7 KiB — 12 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v51/KFOKCnqEu92Fr1Mu53ZEC9_Vu3r1gIhOszmOClHrs6ljXfMMLoHQuAj-k3Yk128.woff2KFOKCnqEu92Fr1Mu53ZEC9_... https://fonts.gstatic.com/s/roboto/v51/KFOKCnqEu92Fr1Mu53ZEC9_Vu3r1gIhOszmOClHrs6ljXfMMLoHQuAj-k3Yk128.woff2 — 17.8 KiB — 9 ms — font-display: swaphttps://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-regular-400-22.woff2pro-fa-regular-400-22.w... https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-regular-400-22.woff2 — 19.8 KiB — 37 ms — font-display: swaphttps://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-brands-400-0.woff2pro-fa-brands-400-0.woff2 https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-brands-400-0.woff2 — 36.9 KiB — 34 ms — font-display: swaphttps://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-13.woff2pro-fa-solid-900-13.woff2 https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-13.woff2 — 13.4 KiB — 37 ms — font-display: swaphttps://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-1.woff2pro-fa-solid-900-1.woff2 https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-1.woff2 — 13.8 KiB — 24 ms — font-display: swaphttps://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-12.woff2pro-fa-solid-900-12.woff2 https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-12.woff2 — 16.1 KiB — 25 ms — font-display: swaphttps://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-regular-400-1.woff2pro-fa-regular-400-1.woff2 https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-regular-400-1.woff2 — 16.7 KiB — 21 ms — font-display: swap
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 37 KB
Load time 12 ms
Start 832 ms
Risk FOUT — text flashes from fallback to web font
KFOKCnqEu92Fr1Mu53ZEC9_... woff2 swap
Size 18 KB
Load time 9 ms
Start 833 ms
Risk FOUT — text flashes from fallback to web font
pro-fa-regular-400-22.w... woff2 swap
Size 20 KB
Load time 37 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
pro-fa-brands-400-0.woff2 woff2 swap
Size 37 KB
Load time 34 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
pro-fa-solid-900-13.woff2 woff2 swap
Size 13 KB
Load time 37 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
pro-fa-solid-900-1.woff2 woff2 swap
Size 14 KB
Load time 24 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
pro-fa-solid-900-12.woff2 woff2 swap
Size 16 KB
Load time 25 ms
Start 1.8 s
Risk FOUT — text flashes from fallback to web font
pro-fa-regular-400-1.woff2 woff2 swap
Size 17 KB
Load time 21 ms
Start 1.8 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
2 hints, 0 missing preconnects
PASS
2 hints, 0 missing preconnects
Info::
Page uses 2 resource hint(s)

Current Resource Hints

preconnect
2
preload
—
dns-prefetch
—
prefetch
—

2 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+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Cloudflare

Network Waterfall
58 requests over 3007ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 3.5 s LCP 6.5 shttps://nrel.gov// https://nrel.gov/ — 301 — 215 B — 466 ms — h2https://www.nlr.gov/www.nlr.gov/ https://www.nlr.gov/ — 200 — 12.5 KiB — 121 ms — h2https://www.nlr.gov/ResourcePackages/FrontEnd/public/library/css/gov/styles-gov.css?v=639123207000000000www.nlr.gov/ResourcePackages/FrontE... https://www.nlr.gov/ResourcePackages/FrontEnd/public/library/css/gov/styles-gov.css?v=639123207000000000 — 200 — 98.2 KiB — 71 ms — h2https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,300;0,400;0,500;0,700;1,400&display=swapfonts.googleapis.com/css2?family=Ro... https://fonts.googleapis.com/css2?family=Roboto:ital,wght@0,300;0,400;0,500;0,700;1,400&display=swap — 200 — 2.4 KiB — 128 ms — h2https://www.nlr.gov/WebResource.axd?d=HtQyXelCu6mzSPcVcvK_BjykPDToej-LFGyQsm-N8BbLjg4wqt3TLM6utk15Ex8EbS0bUgTJRZ_3vHQ60kzHEseebs5B7RNbkWk9fQSC_3-Mb4YXAUtSZNZ13O2u6paKG_Ff4UoMNNKRdD-Osbk5FG8WPycT7wA79QOiS6sMmMO3ogxM7wS0D7jDR6MtTzMW5w1aqTpEzWn8DypUeJ3d6WXHnMQKLDOXOht83U0YmkM1&t=638875725340000000www.nlr.gov/WebResource.axd?d=HtQyX... https://www.nlr.gov/WebResource.axd?d=HtQyXelCu6mzSPcVcvK_BjykPDToej-LFGyQsm-N8BbLjg4wqt3TLM6utk15Ex8EbS0bUgTJRZ_3vHQ60kzHEseebs5B7RNbkWk9fQSC_3-Mb4YXAUtSZNZ13O2u6paKG_Ff4UoMNNKRdD-Osbk5FG8WPycT7wA79QOiS6sMmMO3ogxM7wS0D7jDR6MtTzMW5w1aqTpEzWn8DypUeJ3d6WXHnMQKLDOXOht83U0YmkM1&t=638875725340000000 — 200 — 5.1 KiB — 46 ms — h2https://www.nlr.gov/images/libraries/global/nlr-logo-horizontal.svg?sfvrsn=3f07526e_2www.nlr.gov/images/libraries/global... https://www.nlr.gov/images/libraries/global/nlr-logo-horizontal.svg?sfvrsn=3f07526e_2 — 200 — 7.3 KiB — 65 ms — h2https://www.nlr.gov/images/libraries/news/20260415-hp-the-fast-lane-3-ways-to-get-more-critical-minerals-now-095141.webp?sfvrsn=7f348e8c_2www.nlr.gov/images/libraries/news/2... https://www.nlr.gov/images/libraries/news/20260415-hp-the-fast-lane-3-ways-to-get-more-critical-minerals-now-095141.webp?sfvrsn=7f348e8c_2 — 200 — 157.1 KiB — 56 ms — h2https://www.nlr.gov/images/libraries/global/hp-data-tools-67850.webp?sfvrsn=3560e9a9_2www.nlr.gov/images/libraries/global... https://www.nlr.gov/images/libraries/global/hp-data-tools-67850.webp?sfvrsn=3560e9a9_2 — 200 — 101.6 KiB — 57 ms — h3https://www.nlr.gov/images/libraries/global/hp-find-a-job-96020.webp?sfvrsn=aa34f77f_2www.nlr.gov/images/libraries/global... https://www.nlr.gov/images/libraries/global/hp-find-a-job-96020.webp?sfvrsn=aa34f77f_2 — 200 — 55.8 KiB — 62 ms — h3https://www.nlr.gov/images/libraries/global/hp-energy-basics-93442.webp?sfvrsn=38561846_2www.nlr.gov/images/libraries/global... 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https://www.google-analytics.com/g/collect?v=2&tid=G-HFDNVE0DSC&gtm=45je64h1h1v872782384z879288587za20gzb79288587zd79288587&_p=1776814653543&gcd=13l3l3l3l1l1&npa=0&dma=0&are=1&cid=1505890306.1776814654&frm=0&pscdl=noapi&rcb=19&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938469~117266401~117384406&sid=1776814654&sct=1&seg=0&dl=https%3A%2F%2Fwww.nlr.gov%2F&dt=Home%20%7C%20NLR&en=page_view&_fv=1&_ss=1&up.nrel_staff=false&tfd=1494 — 204 — 547 B — 139 ms — h2https://ka-p.fontawesome.com/releases/v6.7.2/css/pro.min.css?token=a5d615d1e4ka-p.fontawesome.com/releases/v6.7.... https://ka-p.fontawesome.com/releases/v6.7.2/css/pro.min.css?token=a5d615d1e4 — 200 — 80.7 KiB — 35 ms — h2https://ka-p.fontawesome.com/releases/v6.7.2/css/pro-v4-shims.min.css?token=a5d615d1e4ka-p.fontawesome.com/releases/v6.7.... https://ka-p.fontawesome.com/releases/v6.7.2/css/pro-v4-shims.min.css?token=a5d615d1e4 — 200 — 4.2 KiB — 26 ms — h2https://ka-p.fontawesome.com/releases/v6.7.2/css/pro-v5-font-face.min.css?token=a5d615d1e4ka-p.fontawesome.com/releases/v6.7.... https://ka-p.fontawesome.com/releases/v6.7.2/css/pro-v5-font-face.min.css?token=a5d615d1e4 — 200 — 7.1 KiB — 27 ms — h2https://ka-p.fontawesome.com/releases/v6.7.2/css/pro-v4-font-face.min.css?token=a5d615d1e4ka-p.fontawesome.com/releases/v6.7.... https://ka-p.fontawesome.com/releases/v6.7.2/css/pro-v4-font-face.min.css?token=a5d615d1e4 — 200 — 1.8 KiB — 32 ms — h2https://kit.fontawesome.com/a5d615d1e4/62368681/kit-upload.csskit.fontawesome.com/a5d615d1e4/6236... https://kit.fontawesome.com/a5d615d1e4/62368681/kit-upload.css — 200 — 141 B — 20 ms — h2https://www.google-analytics.com/g/collect?v=2&tid=G-CSLL4ZEK4L&gtm=45je64h1h1v9131934939za200zb79288587zd79288587&_p=1776814653543&gcd=13l3l3l3l1l1&npa=0&dma=0&are=1&cid=1505890306.1776814654&frm=0&pscdl=noapi&rcb=9&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938469~117266401&dl=https%3A%2F%2Fnlr.gov%2F&dt=Home%20%7C%20NLR&dr=&sid=1776814654&sct=1&seg=0&_tu=wA&en=page_view&_fv=1&_ss=1&_ee=1&ep.agency=NREL&ep.subagency=NLR.GOV&ep.site_topic=unspecified%3Anlr.gov&ep.site_platform=unspecified%3Anlr.gov&ep.script_source=https%3A%2F%2Fdap.digitalgov.gov%2Funiversal-federated-analytics-min.js&ep.version=20250702%20v8.7%20-%20ga4&ep.protocol=https%3A&ep.using_parallel_tracker=no&ep.hostname_dimension=nlr.gov&tfd=1608www.google-analytics.com/g/collect?... https://www.google-analytics.com/g/collect?v=2&tid=G-CSLL4ZEK4L&gtm=45je64h1h1v9131934939za200zb79288587zd79288587&_p=1776814653543&gcd=13l3l3l3l1l1&npa=0&dma=0&are=1&cid=1505890306.1776814654&frm=0&pscdl=noapi&rcb=9&sr=412x823&uaa=&uab=64&uafvl=Not-A.Brand%3B24.0.0.0%7CChromium%3B146.0.7680.164&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938465~115938469~117266401&dl=https%3A%2F%2Fnlr.gov%2F&dt=Home%20%7C%20NLR&dr=&sid=1776814654&sct=1&seg=0&_tu=wA&en=page_view&_fv=1&_ss=1&_ee=1&ep.agency=NREL&ep.subagency=NLR.GOV&ep.site_topic=unspecified%3Anlr.gov&ep.site_platform=unspecified%3Anlr.gov&ep.script_source=https%3A%2F%2Fdap.digitalgov.gov%2Funiversal-federated-analytics-min.js&ep.version=20250702%20v8.7%20-%20ga4&ep.protocol=https%3A&ep.using_parallel_tracker=no&ep.hostname_dimension=nlr.gov&tfd=1608 — 204 — 48 B — 179 ms — h2https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-regular-400-22.woff2ka-p.fontawesome.com/releases/v6.7.... https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-regular-400-22.woff2 — 200 — 19.8 KiB — 37 ms — h2https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-brands-400-0.woff2ka-p.fontawesome.com/releases/v6.7.... https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-brands-400-0.woff2 — 200 — 36.9 KiB — 34 ms — h2https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-13.woff2ka-p.fontawesome.com/releases/v6.7.... https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-13.woff2 — 200 — 13.4 KiB — 37 ms — h2https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-1.woff2ka-p.fontawesome.com/releases/v6.7.... https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-1.woff2 — 200 — 13.8 KiB — 24 ms — h2https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-12.woff2ka-p.fontawesome.com/releases/v6.7.... https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-solid-900-12.woff2 — 200 — 16.1 KiB — 25 ms — h2https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-regular-400-1.woff2ka-p.fontawesome.com/releases/v6.7.... https://ka-p.fontawesome.com/releases/v6.7.2/webfonts/pro-fa-regular-400-1.woff2 — 200 — 16.7 KiB — 21 ms — h2https://buttons-config.sharethis.com/js/64bee650c73e910012491844.jsbuttons-config.sharethis.com/js/64b... https://buttons-config.sharethis.com/js/64bee650c73e910012491844.js — 200 — 1.0 KiB — 429 ms — h2https://l.sharethis.com/pview?event=pview&hostname=www.nlr.gov&location=%2F&product=inline-share-buttons&url=https%3A%2F%2Fwww.nlr.gov%2F&source=platform&fcmp=false&fcmpv2=false&has_segmentio=false&title=Home%20%7C%20NLR&cms=unknown&publisher=64bee650c73e910012491844&sop=true&version=st_sop.js&lang=en&description=NLR%20bridges%20research%20with%20real-world%20applications%20to%20advance%20energy%20technologies%20that%20lower%20costs%2C%20boost%20the%20economy%2C%20strengthen%20security%2C%20and%20ensure%20abundant%20energy.&ua=%22Chromium%22%3Bv%3D%22146%22%2C%20%22Google%20Chrome%22%3Bv%3D%22146%22&ua_mobile=true&ua_platform=Android&ua_full_version_list=%22Not-A.Brand%22%3Bv%3D%2224.0.0.0%22%2C%20%22Chromium%22%3Bv%3D%22146.0.7680.164%22&ua_model=moto%20g%20power%20(2022)&ua_platform_version=11.0&uuid=439ca435-9e00-41d5-aedb-3a67ad9f449bl.sharethis.com/pview?event=pview&h... https://l.sharethis.com/pview?event=pview&hostname=www.nlr.gov&location=%2F&product=inline-share-buttons&url=https%3A%2F%2Fwww.nlr.gov%2F&source=platform&fcmp=false&fcmpv2=false&has_segmentio=false&title=Home%20%7C%20NLR&cms=unknown&publisher=64bee650c73e910012491844&sop=true&version=st_sop.js&lang=en&description=NLR%20bridges%20research%20with%20real-world%20applications%20to%20advance%20energy%20technologies%20that%20lower%20costs%2C%20boost%20the%20economy%2C%20strengthen%20security%2C%20and%20ensure%20abundant%20energy.&ua=%22Chromium%22%3Bv%3D%22146%22%2C%20%22Google%20Chrome%22%3Bv%3D%22146%22&ua_mobile=true&ua_platform=Android&ua_full_version_list=%22Not-A.Brand%22%3Bv%3D%2224.0.0.0%22%2C%20%22Chromium%22%3Bv%3D%22146.0.7680.164%22&ua_model=moto%20g%20power%20(2022)&ua_platform_version=11.0&uuid=439ca435-9e00-41d5-aedb-3a67ad9f449b — 301 — 1.6 KiB — 552 ms — http/1.1https://c.clarity.ms/c.gifc.clarity.ms/c.gif https://c.clarity.ms/c.gif — 302 — 517 B — 136 ms — h2https://www.nlr.gov/ResourcePackages/Frontend/public/library/img/favicons/gov/favicon.ico?v=639123207020000000www.nlr.gov/ResourcePackages/Fronte... https://www.nlr.gov/ResourcePackages/Frontend/public/library/img/favicons/gov/favicon.ico?v=639123207020000000 — 200 — 5.6 KiB — 70 ms — h3https://l.sharethis.com/sc?event=pview&hostname=www.nlr.gov&location=%2F&product=inline-share-buttons&url=https%3A%2F%2Fwww.nlr.gov%2F&source=platform&fcmp=false&fcmpv2=false&has_segmentio=false&title=Home%20%7C%20NLR&cms=unknown&publisher=64bee650c73e910012491844&sop=true&version=st_sop.js&lang=en&description=NLR%20bridges%20research%20with%20real-world%20applications%20to%20advance%20energy%20technologies%20that%20lower%20costs%2C%20boost%20the%20economy%2C%20strengthen%20security%2C%20and%20ensure%20abundant%20energy.&ua=%22Chromium%22%3Bv%3D%22146%22%2C%20%22Google%20Chrome%22%3Bv%3D%22146%22&ua_mobile=true&ua_platform=Android&ua_full_version_list=%22Not-A.Brand%22%3Bv%3D%2224.0.0.0%22%2C%20%22Chromium%22%3Bv%3D%22146.0.7680.164%22&ua_model=moto%20g%20power%20(2022)&ua_platform_version=11.0&uuid=439ca435-9e00-41d5-aedb-3a67ad9f449b&samesite=Nonel.sharethis.com/sc?event=pview&host... https://l.sharethis.com/sc?event=pview&hostname=www.nlr.gov&location=%2F&product=inline-share-buttons&url=https%3A%2F%2Fwww.nlr.gov%2F&source=platform&fcmp=false&fcmpv2=false&has_segmentio=false&title=Home%20%7C%20NLR&cms=unknown&publisher=64bee650c73e910012491844&sop=true&version=st_sop.js&lang=en&description=NLR%20bridges%20research%20with%20real-world%20applications%20to%20advance%20energy%20technologies%20that%20lower%20costs%2C%20boost%20the%20economy%2C%20strengthen%20security%2C%20and%20ensure%20abundant%20energy.&ua=%22Chromium%22%3Bv%3D%22146%22%2C%20%22Google%20Chrome%22%3Bv%3D%22146%22&ua_mobile=true&ua_platform=Android&ua_full_version_list=%22Not-A.Brand%22%3Bv%3D%2224.0.0.0%22%2C%20%22Chromium%22%3Bv%3D%22146.0.7680.164%22&ua_model=moto%20g%20power%20(2022)&ua_platform_version=11.0&uuid=439ca435-9e00-41d5-aedb-3a67ad9f449b&samesite=None — 200 — 946 B — 139 ms — http/1.1https://c.bing.com/c.gif?ctsa=mr&CtsSyncId=A39A922058CE4E4092B959648DEDF574&RedC=c.clarity.ms&MXFR=06E14FD9A43065BB232F589BA0306BDAc.bing.com/c.gif?ctsa=mr&CtsSyncId=... https://c.bing.com/c.gif?ctsa=mr&CtsSyncId=A39A922058CE4E4092B959648DEDF574&RedC=c.clarity.ms&MXFR=06E14FD9A43065BB232F589BA0306BDA — 302 — 768 B — 129 ms — h2https://b.clarity.ms/collectb.clarity.ms/collect https://b.clarity.ms/collect — 204 — 275 B — 473 ms — http/1.1https://c.clarity.ms/c.gif?ctsa=mr&CtsSyncId=A39A922058CE4E4092B959648DEDF574&MUID=1590DC89A41D6B5D191DCBCBA5AC6A65c.clarity.ms/c.gif?ctsa=mr&CtsSyncI... https://c.clarity.ms/c.gif?ctsa=mr&CtsSyncId=A39A922058CE4E4092B959648DEDF574&MUID=1590DC89A41D6B5D191DCBCBA5AC6A65 — 200 — 467 B — 121 ms — h2
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Third-Party Script Cost
Per-script blocking time, transfer cost, and cache headers
INFO
100% of JavaScript execution is third-party
First-party Third-party 3866ms · 979KB · $51/mo
www.nlr.gov
Other
Costly
Execution 866ms
Transfer 12 KB
Monthly Cost $12/mo
Unattributable
Other
Costly
Execution 659ms
Transfer 0 KB
Monthly Cost $9/mo
Microsoft Clarity
Session Replay
Costly
Execution 414ms
Transfer 26 KB
Monthly Cost $6/mo
Google Tag Manager
Tag Manager
Costly
Execution 364ms
Transfer 156 KB
Unused 40%
Monthly Cost $5/mo
Google Tag Manager
Tag Manager
Costly
Execution 350ms
Transfer 147 KB
Unused 43%
Monthly Cost $5/mo
Google Tag Manager
Tag Manager
Costly
Execution 294ms
Transfer 153 KB
Unused 41%
Monthly Cost $4/mo
Google Tag Manager
Tag Manager
Costly
Execution 284ms
Transfer 134 KB
Unused 47%
Monthly Cost $4/mo
cdn.insight.sitefinity.com
Other
Optional
Execution 190ms
Transfer 11 KB
Monthly Cost $3/mo
Google Tag Manager
Tag Manager
Optional
Execution 123ms
Transfer 147 KB
Unused 72%
Monthly Cost $2/mo
platform-api.sharethis.com
Other
Optional
Execution 89ms
Transfer 47 KB
Unused 58%
Monthly Cost $1/mo
www.nlr.gov
Other
Optional
Execution 82ms
Transfer 98 KB
Monthly Cost $1/mo
dap.digitalgov.gov
Other
Optional
Execution 79ms
Transfer 5 KB
Monthly Cost $1/mo
www.nlr.gov
Other
Optional
Execution 74ms
Transfer 41 KB
Unused 75%
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.nlr.gov adds 866ms and costs ~$12/month
  • Unattributable adds 659ms and costs ~$9/month
  • Microsoft Clarity adds 414ms and costs ~$6/month
  • Google Tag Manager adds 364ms and costs ~$5/month
  • Google Tag Manager adds 350ms and costs ~$5/month
  • Google Tag Manager adds 294ms and costs ~$4/month
  • Google Tag Manager adds 284ms and costs ~$4/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.nlr.gov takes 866ms 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 659ms 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

Microsoft Clarity takes 414ms 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 364ms 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 350ms 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 294ms 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 284ms 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

72% 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

58% of platform-api.sharethis.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

75% of www.nlr.gov'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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