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Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
74
GRADE
C
FIX
5
REVIEW
2
PASS
8
INFO
2

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

Mobile Desktop
36
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
91
Accessibility Measures how accessible the page is for users with disabilities. Checks color contrast, ARIA labels, and semantic HTML.
77
Best Practices Checks for modern web development best practices including HTTPS, no console errors, and secure JavaScript.
92
SEO Measures basic SEO optimizations: meta tags, crawlability, link text, and mobile friendliness.

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

5.68 s

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

19.28 s

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

1.11 s

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.

6.90 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.

21.02 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 2 REVIEW 5 FIX
F
Page Weight Budget
Action
3.0 MB transferred, 95 requests
FIX
3.0 MB transferred, 95 requests
Warning::
Page weighs 18.2 MB (3.0 MB transferred)
Warning::
JavaScript is 1.7 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 1.7 MB
Info::
CSS is 599 KB — consider purging unused styles
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
Got: 599 KB
Info::
Fonts are 384 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 384 KB
Info::
95 HTTP requests
Info::
Estimated 0.63 g CO2 per page load
3.0 MB / 2.4 MB budget
3.0 MB transferred
95 requests
0.63 g CO2 per page load
JavaScript 1.7 MiB 58%
CSS 599.2 KiB 20%
Fonts 384.2 KiB 13%
Images 243.5 KiB 8%
Other 31.4 KiB 1%
HTML 28.7 KiB 1%
Other 5.3 KiB 0%
Other 3.9 KiB 0%
Other 225 B 0%
0 2.4 MB 4.9 MB
Over budget

Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.

Why this matters

JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.

Source: web.dev

Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.

Why this matters

CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.

Source: web.dev

Subset fonts to include only used characters, or switch to system font stacks.

Why this matters

Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).

Source: web.dev font loading

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (3.0 MiB of 3.0 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
4541ms total JS execution
FIX
4541ms total JS execution
Warning::
https://www.chewy.com/api/efproc/v3/uMeW0WfnyLJmtF...: 787ms CPU time
Warning::
https://www.petmd.com/: 779ms CPU time
Warning::
Unattributable: 774ms CPU time
Warning::
https://www.petmd.com/_next/static/chunks/__federa...: 496ms CPU time
Warning::
https://js-cdn.dynatrace.com/jstag/1624d0f62e6/bf2...: 391ms CPU time
Warning::
Third-party scripts: 4541ms (100% of total)

Main Thread Breakdown

Script Evaluation 54% Other 20% Script Parsing & Compilation 11% Style & Layout 8% Parse HTML & CSS 3%
ScriptTotalScriptingParse/CompileParty
https://www.chewy.com/api/efproc/v3/uMeW0WfnyLJmtFjTtKZv/loader_v3.9.6.js787ms662ms12ms3rd
https://www.petmd.com/779ms41ms5ms3rd
Unattributable774ms98ms0ms3rd
https://www.petmd.com/_next/static/chunks/__federation_expose_react_dom.57bd4d2571ede4d5.js496ms433ms8ms3rd
https://js-cdn.dynatrace.com/jstag/1624d0f62e6/bf20861wzf/cb0f83072f3ae16b_complete.js391ms353ms20ms3rd
https://www.petmd.com/_next/static/chunks/467.0036f9dc47abfb8d.js285ms285ms0ms3rd
https://www.petmd.com/_next/static/chunks/pages/%5B%5B...path%5D%5D-bd073354cb97a85d.js242ms5ms235ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MXD7M9K&gtm_auth=&gtm_preview=&gtm_cookies_win=x215ms178ms29ms3rd
https://www.googletagmanager.com/gtag/js?id=G-2X9EJY3CJS&cx=c&gtm=4e64k1202ms165ms36ms3rd
https://www.petmd.com/_next/static/chunks/pages/_app-0942a6a8fe438b27.js137ms15ms120ms3rd

Showing top 10 of 13 scripts

D
JS Bundles
Action
30 scripts, 447 KB unused
FIX
30 scripts, 447 KB unused
Warning::
https://www.petmd.com/_next/static/chunks/pages/_a...: 104 KB unused (28%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtag/js?id=G-2X9E...: 72 KB unused (41%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.googletagmanager.com/gtm.js?id=GTM-MXD...: 62 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.petmd.com/_next/static/chunks/pages/%5...: 56 KB unused (10%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://js-cdn.dynatrace.com/jstag/1624d0f62e6/bf2...: 51 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 447 KB
447 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.petmd.com/_next/static/chunks/pages/_app-0942a6a8fe438b27.js369 KB104 KB (28%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-2X9EJY3CJS&cx=c&gtm=4e64k1173 KB72 KB (41%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-MXD7M9K&gtm_auth=&gtm_preview=&gtm_cookies_win=x141 KB62 KB (44%)✓3rd
https://www.petmd.com/_next/static/chunks/pages/%5B%5B...path%5D%5D-bd073354cb97a85d.js557 KB56 KB (10%)✓3rd
https://js-cdn.dynatrace.com/jstag/1624d0f62e6/bf20861wzf/cb0f83072f3ae16b_complete.js110 KB51 KB (46%)✓3rd
https://www.petmd.com/_next/static/chunks/main-6b3d470cb1a46046.js53 KB49 KB (92%)✓3rd
https://s.go-mpulse.net/boomerang/X8M7X-KLATY-ZBTJZ-9DMEL-VGPEV57 KB32 KB (56%)✓3rd
https://www.petmd.com/_next/static/chunks/__federation_expose_next__router.184f8c9686a234b2.js23 KB22 KB (96%)✓3rd
https://www.petmd.com/akam/13/6380c1829 KB—✓3rd
https://www.petmd.com/_next/static/chunks/305.58cbb7f8ec04b6d4.js10 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
95 resources · 3.0 MB · 447 KB savings available
FIX
95 resources · 3.0 MB · 447 KB savings available
Warning::
Page weight 2.0 MB over 1MB target
Got: 3.0 MB Expected: ≤ 1 MB
Info::
~447 KB of savings available
Warning::
94 third-party resources (100% of weight)
Info::
3 resources over 200KB
95 resources · 3.0 MiB · 94 third-party 2.0 MiB over 1MB target
JavaScript 58% · 1.7 MiB
CSS 20% · 599.2 KiB
Font 13% · 384.2 KiB
Image 8% · 246.8 KiB
Other 1% · 37.5 KiB
Document 1% · 28.7 KiB

~446.9 KiB of savings available

Remove unused JavaScript: 446.9 KiB
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
max-age=0
REVIEW
max-age=0
Info::
Cache-Control header is set
Got: max-age=0
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

max-age=0

DirectiveValueMeaning
max-age0Cache for 0 seconds
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+
Image Optimization
16 images, 0 KB saveable
PASS
16 images, 0 KB saveable
Info::
All images are well-optimized
16 images 243 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+
Font Loading
13 fonts (384 KB)
PASS
13 fonts (384 KB)
Info::
13 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

13

384 KB total

Render-blocking

0

of 13

Dominant font-display

swap

Most common across fonts

Font loading timeline
Transfer FOIT (block) FOUT (swap)
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s FCP 5.7 s LCP 19.3 shttps://static.chewy.com/lib/dft/latest/fonts/canela/CanelaDeck-Medium-Web.woff2CanelaDeck-Medium-Web.w... https://static.chewy.com/lib/dft/latest/fonts/canela/CanelaDeck-Medium-Web.woff2 — 34.8 KiB — 147 ms — font-display: swaphttps://static.chewy.com/lib/dft/latest/fonts/gordita/Gordita-bold-subset.woff2Gordita-bold-subset.woff2 https://static.chewy.com/lib/dft/latest/fonts/gordita/Gordita-bold-subset.woff2 — 24.4 KiB — 238 ms — font-display: swaphttps://www.petmd.com/fonts/canela/CanelaDeck-Medium-Web.woff2CanelaDeck-Medium-Web.w... https://www.petmd.com/fonts/canela/CanelaDeck-Medium-Web.woff2 — 35.2 KiB — 14 ms — font-display: swaphttps://www.petmd.com/fonts/gordita/Gordita-bold-subset.woff2Gordita-bold-subset.woff2 https://www.petmd.com/fonts/gordita/Gordita-bold-subset.woff2 — 27.6 KiB — 15 ms — font-display: swaphttps://static.chewy.com/lib/dft/latest/fonts/gordita/Gordita-regular-subset.woff2Gordita-regular-subset.... https://static.chewy.com/lib/dft/latest/fonts/gordita/Gordita-regular-subset.woff2 — 24.0 KiB — 239 ms — font-display: swaphttps://www.petmd.com/fonts/canela/CanelaText-Medium-Web.woff2CanelaText-Medium-Web.w... https://www.petmd.com/fonts/canela/CanelaText-Medium-Web.woff2 — 45.0 KiB — 16 ms — font-display: swaphttps://static.chewy.com/lib/dft/latest/fonts/gordita/Gordita-medium-subset.woff2Gordita-medium-subset.w... https://static.chewy.com/lib/dft/latest/fonts/gordita/Gordita-medium-subset.woff2 — 24.6 KiB — 146 ms — font-display: swaphttps://www.petmd.com/fonts/gordita/Gordita-regular-subset.woff2Gordita-regular-subset.... https://www.petmd.com/fonts/gordita/Gordita-regular-subset.woff2 — 27.0 KiB — 23 ms — font-display: swaphttps://static.chewy.com/lib/dft/latest/fonts/gordita/gordita-medium-webfont.woff2gordita-medium-webfont.... https://static.chewy.com/lib/dft/latest/fonts/gordita/gordita-medium-webfont.woff2 — 24.6 KiB — 22 ms — font-display: swaphttps://static.chewy.com/lib/dft/latest/fonts/gordita/gordita-regular-webfont.woff2gordita-regular-webfont... https://static.chewy.com/lib/dft/latest/fonts/gordita/gordita-regular-webfont.woff2 — 24.0 KiB — 23 ms — font-display: swaphttps://static.chewy.com/lib/dft/latest/fonts/canela/CanelaText-Medium-Web.woff2CanelaText-Medium-Web.w... https://static.chewy.com/lib/dft/latest/fonts/canela/CanelaText-Medium-Web.woff2 — 44.5 KiB — 24 ms — font-display: swaphttps://static.chewy.com/lib/dft/latest/fonts/gordita/gordita-bold-webfont.woff2gordita-bold-webfont.woff2 https://static.chewy.com/lib/dft/latest/fonts/gordita/gordita-bold-webfont.woff2 — 24.3 KiB — 25 ms — font-display: swaphttps://static.chewy.com/lib/dft/latest/fonts/gordita/gordita-light-webfont.woff2gordita-light-webfont.w... https://static.chewy.com/lib/dft/latest/fonts/gordita/gordita-light-webfont.woff2 — 24.3 KiB — 127 ms — font-display: swap
CanelaDeck-Medium-Web.w... woff2 swap
Size 35 KB
Load time 147 ms
Start 649 ms
Risk FOUT — text flashes from fallback to web font
Gordita-bold-subset.woff2 woff2 swap
Size 24 KB
Load time 238 ms
Start 650 ms
Risk FOUT — text flashes from fallback to web font
CanelaDeck-Medium-Web.w... woff2 swap
Size 35 KB
Load time 14 ms
Start 650 ms
Risk FOUT — text flashes from fallback to web font
Gordita-bold-subset.woff2 woff2 swap
Size 28 KB
Load time 15 ms
Start 651 ms
Risk FOUT — text flashes from fallback to web font
Gordita-regular-subset.... woff2 swap
Size 24 KB
Load time 239 ms
Start 651 ms
Risk FOUT — text flashes from fallback to web font
CanelaText-Medium-Web.w... woff2 swap
Size 45 KB
Load time 16 ms
Start 651 ms
Risk FOUT — text flashes from fallback to web font
Gordita-medium-subset.w... woff2 swap
Size 25 KB
Load time 146 ms
Start 651 ms
Risk FOUT — text flashes from fallback to web font
Gordita-regular-subset.... woff2 swap
Size 27 KB
Load time 23 ms
Start 655 ms
Risk FOUT — text flashes from fallback to web font
gordita-medium-webfont.... woff2 swap
Size 25 KB
Load time 22 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
gordita-regular-webfont... woff2 swap
Size 24 KB
Load time 23 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
CanelaText-Medium-Web.w... woff2 swap
Size 45 KB
Load time 24 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
gordita-bold-webfont.woff2 woff2 swap
Size 24 KB
Load time 25 ms
Start 1.1 s
Risk FOUT — text flashes from fallback to web font
gordita-light-webfont.w... woff2 swap
Size 24 KB
Load time 127 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
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
Render-Blocking Resources
No render-blocking resources detected
PASS
No render-blocking resources detected
Info::
No render-blocking resources detected in <head>
A+
Third-Party Resources
No third-party resources detected
PASS
No third-party resources detected
Network Waterfall
95 requests over 5538ms
INFO
0 ms 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s 16.0 s 18.0 s 20.0 s FCP 5.7 s LCP 19.3 shttps://petmd.com// https://petmd.com/ — 301 — 798 B — 116 ms — h2https://www.petmd.com/www.petmd.com/ https://www.petmd.com/ — 200 — 28.7 KiB — 527 ms — h2https://static.chewy.com/lib/dft/latest/fonts/canela/CanelaDeck-Medium-Web.woff2static.chewy.com/lib/dft/latest/fon... https://static.chewy.com/lib/dft/latest/fonts/canela/CanelaDeck-Medium-Web.woff2 — 200 — 34.8 KiB — 147 ms — h2https://static.chewy.com/lib/dft/latest/fonts/gordita/Gordita-bold-subset.woff2static.chewy.com/lib/dft/latest/fon... https://static.chewy.com/lib/dft/latest/fonts/gordita/Gordita-bold-subset.woff2 — 200 — 24.4 KiB — 238 ms — h2https://www.petmd.com/fonts/canela/CanelaDeck-Medium-Web.woff2www.petmd.com/fonts/canela/CanelaDe... https://www.petmd.com/fonts/canela/CanelaDeck-Medium-Web.woff2 — 200 — 35.2 KiB — 14 ms — h2https://www.petmd.com/fonts/gordita/Gordita-bold-subset.woff2www.petmd.com/fonts/gordita/Gordita... https://www.petmd.com/fonts/gordita/Gordita-bold-subset.woff2 — 200 — 27.6 KiB — 15 ms — h2https://static.chewy.com/lib/dft/latest/fonts/gordita/Gordita-regular-subset.woff2static.chewy.com/lib/dft/latest/fon... https://static.chewy.com/lib/dft/latest/fonts/gordita/Gordita-regular-subset.woff2 — 200 — 24.0 KiB — 239 ms — h2https://www.petmd.com/fonts/canela/CanelaText-Medium-Web.woff2www.petmd.com/fonts/canela/CanelaTe... https://www.petmd.com/fonts/canela/CanelaText-Medium-Web.woff2 — 200 — 45.0 KiB — 16 ms — h2https://static.chewy.com/lib/dft/latest/fonts/gordita/Gordita-medium-subset.woff2static.chewy.com/lib/dft/latest/fon... https://static.chewy.com/lib/dft/latest/fonts/gordita/Gordita-medium-subset.woff2 — 200 — 24.6 KiB — 146 ms — h2https://www.petmd.com/fonts/gordita/Gordita-regular-subset.woff2www.petmd.com/fonts/gordita/Gordita... https://www.petmd.com/fonts/gordita/Gordita-regular-subset.woff2 — 200 — 27.0 KiB — 23 ms — h2https://www.petmd.com/fonts/font-canela.css?v=1www.petmd.com/fonts/font-canela.css... https://www.petmd.com/fonts/font-canela.css?v=1 — 200 — 579 B — 334 ms — h3https://www.petmd.com/fonts/font-gordita.csswww.petmd.com/fonts/font-gordita.cs... https://www.petmd.com/fonts/font-gordita.css — 200 — 444 B — 58 ms — h3https://static.chewy.com/lib/dft/latest/fonts/fonts-chirp.cssstatic.chewy.com/lib/dft/latest/fon... https://static.chewy.com/lib/dft/latest/fonts/fonts-chirp.css — 200 — 1.6 KiB — 225 ms — h2https://static.chewy.com/lib/cds/kib-normalize/latest/styles/theme-base-light.cssstatic.chewy.com/lib/cds/kib-normal... https://static.chewy.com/lib/cds/kib-normalize/latest/styles/theme-base-light.css — 200 — 18.5 KiB — 231 ms — h2https://static.chewy.com/lib/cds/kib-normalize/latest/styles/theme-experiments.cssstatic.chewy.com/lib/cds/kib-normal... https://static.chewy.com/lib/cds/kib-normalize/latest/styles/theme-experiments.css — 200 — 625 B — 226 ms — h2https://static.chewy.com/lib/cds/kib-normalize/latest/styles/theme-petmd.cssstatic.chewy.com/lib/cds/kib-normal... https://static.chewy.com/lib/cds/kib-normalize/latest/styles/theme-petmd.css — 200 — 18.6 KiB — 230 ms — h2https://static.chewy.com/lib/cds/kib-normalize/latest/styles/theme-gordita-2025-embed.cssstatic.chewy.com/lib/cds/kib-normal... https://static.chewy.com/lib/cds/kib-normalize/latest/styles/theme-gordita-2025-embed.css — 200 — 487 B — 227 ms — h2https://www.petmd.com/_next/static/css/0ceff91372e703f9.csswww.petmd.com/_next/static/css/0cef... https://www.petmd.com/_next/static/css/0ceff91372e703f9.css — 200 — 175.4 KiB — 65 ms — h3https://www.petmd.com/_next/static/css/508207be1f6223d7.csswww.petmd.com/_next/static/css/5082... https://www.petmd.com/_next/static/css/508207be1f6223d7.css — 200 — 376.3 KiB — 67 ms — h3https://pet-health-content-media.chewy.com/wp-content/uploads/2026/04/15143807/dogwalingbanner.png?w=750&q=75pet-health-content-media.chewy.com/... 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9.7 KiB — 119 ms — h3https://www.petmd.com/_next/data/OK6NxpYYhpal0WJQ7eJTN/en/cat/behavior/why-do-cats-bring-you-gifts.json?path=cat&path=behavior&path=why-do-cats-bring-you-giftswww.petmd.com/_next/data/OK6NxpYYhp... https://www.petmd.com/_next/data/OK6NxpYYhpal0WJQ7eJTN/en/cat/behavior/why-do-cats-bring-you-gifts.json?path=cat&path=behavior&path=why-do-cats-bring-you-gifts — 200 — 8.0 KiB — 136 ms — h3data:image/svg+xml,%3csvg%20xmlns=%27http://www.w3.org/2000/svg%27%20version=%271.1%27%20width=%272…www.w3.org/2000/svg%27%20version=%2... data:image/svg+xml,%3csvg%20xmlns=%27http://www.w3.org/2000/svg%27%20version=%271.1%27%20width=%272… — 200 — 0 B — 0 ms — datahttps://pet-health-content-media.chewy.com/wp-content/uploads/2026/03/27175804/credelio-cat-banner-mobile.pngpet-health-content-media.chewy.com/... https://pet-health-content-media.chewy.com/wp-content/uploads/2026/03/27175804/credelio-cat-banner-mobile.png — 200 — 15.7 KiB — 16 ms — h2https://cdn.segment.com/v1/projects/1KzSTEtY3SDYavbIojCU3BvKlPIi0wvS/settingscdn.segment.com/v1/projects/1KzSTEt... https://cdn.segment.com/v1/projects/1KzSTEtY3SDYavbIojCU3BvKlPIi0wvS/settings — 200 — 1.3 KiB — 53 ms — h2https://c.go-mpulse.net/api/config.json?key=X8M7X-KLATY-ZBTJZ-9DMEL-VGPEV&d=www.petmd.com&t=5922989&v=1.720.0&sl=0&si=03d4a6d8-4db7-4c1e-9a60-2cf780dfbeeb-tdx2cy&plugins=AK,ConfigOverride,Continuity,PageParams,IFrameDelay,AutoXHR,SPA,History,Angular,Backbone,Ember,RT,CrossDomain,BW,PaintTiming,NavigationTiming,ResourceTiming,Memory,CACHE_RELOAD,Errors,TPAnalytics,UserTiming,Akamai,Early,EventTiming,LOGN&acao=&ak.ai=686809c.go-mpulse.net/api/config.json?key... https://c.go-mpulse.net/api/config.json?key=X8M7X-KLATY-ZBTJZ-9DMEL-VGPEV&d=www.petmd.com&t=5922989&v=1.720.0&sl=0&si=03d4a6d8-4db7-4c1e-9a60-2cf780dfbeeb-tdx2cy&plugins=AK,ConfigOverride,Continuity,PageParams,IFrameDelay,AutoXHR,SPA,History,Angular,Backbone,Ember,RT,CrossDomain,BW,PaintTiming,NavigationTiming,ResourceTiming,Memory,CACHE_RELOAD,Errors,TPAnalytics,UserTiming,Akamai,Early,EventTiming,LOGN&acao=&ak.ai=686809 — 200 — 722 B — 282 ms — h2https://www.petmd.com/_next/static/css/508207be1f6223d7.csswww.petmd.com/_next/static/css/5082... https://www.petmd.com/_next/static/css/508207be1f6223d7.css — 200 — 0 B — 9 ms — h3https://cdn.segment.com/analytics-next/bundles/ajs-destination.bundle.8e6b895db75187c55313.jscdn.segment.com/analytics-next/bund... https://cdn.segment.com/analytics-next/bundles/ajs-destination.bundle.8e6b895db75187c55313.js — 200 — 3.4 KiB — 18 ms — h2https://cdn.segment.com/analytics-next/bundles/schemaFilter.bundle.1b218d13fed021531d4e.jscdn.segment.com/analytics-next/bund... https://cdn.segment.com/analytics-next/bundles/schemaFilter.bundle.1b218d13fed021531d4e.js — 200 — 1.2 KiB — 18 ms — h2https://www.googletagmanager.com/gtag/js?id=G-2X9EJY3CJS&cx=c&gtm=4e64k1www.googletagmanager.com/gtag/js?id... https://www.googletagmanager.com/gtag/js?id=G-2X9EJY3CJS&cx=c&gtm=4e64k1 — 200 — 173.2 KiB — 68 ms — h2https://cdn.cookielaw.org/scripttemplates/otSDKStub.jscdn.cookielaw.org/scripttemplates/o... https://cdn.cookielaw.org/scripttemplates/otSDKStub.js — -1 — 0 B — 123 ms — https://www.google-analytics.com/analytics.jswww.google-analytics.com/analytics.... https://www.google-analytics.com/analytics.js — 200 — 20.9 KiB — 121 ms — h2https://js-cdn.dynatrace.com/jstag/1624d0f62e6/bf20861wzf/cb0f83072f3ae16b_complete.jsjs-cdn.dynatrace.com/jstag/1624d0f6... https://js-cdn.dynatrace.com/jstag/1624d0f62e6/bf20861wzf/cb0f83072f3ae16b_complete.js — 200 — 109.8 KiB — 526 ms — h2https://region1.google-analytics.com/g/collect?v=2&tid=G-2X9EJY3CJS&gtm=45je64k1v9104581304z876093581za20gzb76093581zd76093581&_p=1776896819530&gcd=13l3lPl2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=1486752883.1776896820&frm=0&pscdl=noapi&rcb=5&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938469~117266401~117512542&sid=1776896819&sct=1&seg=0&dl=https%3A%2F%2Fwww.petmd.com%2F&dt=The%20Best%20Pet%20Health%20%26%20Care%20Advice%20from%20Real%20Vets%20%7C%20PetMD&en=page_view&_fv=1&_nsi=1&_ss=1&tfd=1801region1.google-analytics.com/g/coll... https://region1.google-analytics.com/g/collect?v=2&tid=G-2X9EJY3CJS&gtm=45je64k1v9104581304z876093581za20gzb76093581zd76093581&_p=1776896819530&gcd=13l3lPl2l1l1&npa=1&dma_cps=a&dma=1&are=1&cid=1486752883.1776896820&frm=0&pscdl=noapi&rcb=5&sr=412x823&uaa=&uab=64&uafvl=Chromium%3B147.0.7727.101%7CNot.A%252FBrand%3B8.0.0.0&uam=moto%20g%20power%20(2022)&uamb=1&uap=Android&uapv=11.0&uaw=0&ul=en-us&_s=1&tag_exp=0~115938466~115938469~117266401~117512542&sid=1776896819&sct=1&seg=0&dl=https%3A%2F%2Fwww.petmd.com%2F&dt=The%20Best%20Pet%20Health%20%26%20Care%20Advice%20from%20Real%20Vets%20%7C%20PetMD&en=page_view&_fv=1&_nsi=1&_ss=1&tfd=1801 — 204 — 548 B — 132 ms — h2https://www.google-analytics.com/j/collect?v=1&_v=j102&a=975399130&t=pageview&_s=1&dl=https%3A%2F%2Fwww.petmd.com%2F&ul=en-us&dt=The%20Best%20Pet%20Health%20%26%20Care%20Advice%20from%20Real%20Vets%20%7C%20PetMD&sr=412x823&vp=412x823&_u=YCDAgEABAAAAACAAI~&jid=1716575338&gjid=1705681411&cid=1486752883.1776896820&tid=UA-5188865-1&_gid=1945402167.1776896820&_slc=1&gtm=45He64k1n81MXD7M9Kv76093581za200zd76093581&gcd=13l3l3l2l1l1&dma_cps=a&dma=1&tag_exp=0~115938466~115938469~117266401&npa=1&z=1961883123www.google-analytics.com/j/collect?... https://www.google-analytics.com/j/collect?v=1&_v=j102&a=975399130&t=pageview&_s=1&dl=https%3A%2F%2Fwww.petmd.com%2F&ul=en-us&dt=The%20Best%20Pet%20Health%20%26%20Care%20Advice%20from%20Real%20Vets%20%7C%20PetMD&sr=412x823&vp=412x823&_u=YCDAgEABAAAAACAAI~&jid=1716575338&gjid=1705681411&cid=1486752883.1776896820&tid=UA-5188865-1&_gid=1945402167.1776896820&_slc=1&gtm=45He64k1n81MXD7M9Kv76093581za200zd76093581&gcd=13l3l3l2l1l1&dma_cps=a&dma=1&tag_exp=0~115938466~115938469~117266401&npa=1&z=1961883123 — 200 — 451 B — 30 ms — h2https://stats.g.doubleclick.net/j/collect?t=dc&aip=1&_r=3&v=1&_v=j102&tid=UA-5188865-1&cid=1486752883.1776896820&jid=1716575338&gjid=1705681411&_gid=1945402167.1776896820&npa=1&_u=YCDAgEABAAAAAGAAI~&z=1499083451stats.g.doubleclick.net/j/collect?t... https://stats.g.doubleclick.net/j/collect?t=dc&aip=1&_r=3&v=1&_v=j102&tid=UA-5188865-1&cid=1486752883.1776896820&jid=1716575338&gjid=1705681411&_gid=1945402167.1776896820&npa=1&_u=YCDAgEABAAAAAGAAI~&z=1499083451 — 200 — 649 B — 114 ms — h2https://www.google-analytics.com/j/collect?v=1&_v=j102&a=975399130&t=pageview&_s=1&dl=https%3A%2F%2Fwww.petmd.com%2F&ul=en-us&dt=The%20Best%20Pet%20Health%20%26%20Care%20Advice%20from%20Real%20Vets%20%7C%20PetMD&sr=412x823&vp=412x823&_u=YCDACEABBAAAAGAAI~&jid=1545872975&gjid=871612870&cid=1486752883.1776896820&tid=UA-23355215-27&_gid=1945402167.1776896820&_r=1&_slc=1&gtm=45He64k1n81MXD7M9Kv76093581za200zd76093581&gcd=13l3l3l2l1l1&dma_cps=a&dma=1&tag_exp=0~115938466~115938469~117266401&npa=1&z=1100407010www.google-analytics.com/j/collect?... https://www.google-analytics.com/j/collect?v=1&_v=j102&a=975399130&t=pageview&_s=1&dl=https%3A%2F%2Fwww.petmd.com%2F&ul=en-us&dt=The%20Best%20Pet%20Health%20%26%20Care%20Advice%20from%20Real%20Vets%20%7C%20PetMD&sr=412x823&vp=412x823&_u=YCDACEABBAAAAGAAI~&jid=1545872975&gjid=871612870&cid=1486752883.1776896820&tid=UA-23355215-27&_gid=1945402167.1776896820&_r=1&_slc=1&gtm=45He64k1n81MXD7M9Kv76093581za200zd76093581&gcd=13l3l3l2l1l1&dma_cps=a&dma=1&tag_exp=0~115938466~115938469~117266401&npa=1&z=1100407010 — 200 — 71 B — 29 ms — h2https://www.petmd.com/akam/13/pixel_6380c182www.petmd.com/akam/13/pixel_6380c18... https://www.petmd.com/akam/13/pixel_6380c182 — 200 — 28 B — 10 ms — h3https://www.chewy.com/api/efproa/7cH8APx/D_mlT/aEqZ/IVumRAp/T?q=uMeW0WfnyLJmtFjTtKZvwww.chewy.com/api/efproa/7cH8APx/D_... https://www.chewy.com/api/efproa/7cH8APx/D_mlT/aEqZ/IVumRAp/T?q=uMeW0WfnyLJmtFjTtKZv — 200 — 1.6 KiB — 137 ms — h2https://js-cdn.dynatrace.com/jstag/1624d0f62e6/ruxitagent_D_10329260206100503.jsjs-cdn.dynatrace.com/jstag/1624d0f6... https://js-cdn.dynatrace.com/jstag/1624d0f62e6/ruxitagent_D_10329260206100503.js — 200 — 11.1 KiB — 54 ms — h2https://www.petmd.com/favicon.icowww.petmd.com/favicon.ico https://www.petmd.com/favicon.ico — 200 — 3.1 KiB — 15 ms — h3https://bf20861wzf.bf.dynatrace.com/bf?type=js3&sn=v_4_srv_-2D17019_sn_T66CQJL79JM8MPB0QU244H4EABQ6R0DF&svrid=-17019&flavor=cors&vi=DGVGVOQQRLHVHMCFEEDVAHDHPPPMJKUS-0&modifiedSince=1776709022267&bp=3&app=cb0f83072f3ae16b&crc=1294710340&en=gfsbom3g&end=1bf20861wzf.bf.dynatrace.com/bf?type... https://bf20861wzf.bf.dynatrace.com/bf?type=js3&sn=v_4_srv_-2D17019_sn_T66CQJL79JM8MPB0QU244H4EABQ6R0DF&svrid=-17019&flavor=cors&vi=DGVGVOQQRLHVHMCFEEDVAHDHPPPMJKUS-0&modifiedSince=1776709022267&bp=3&app=cb0f83072f3ae16b&crc=1294710340&en=gfsbom3g&end=1 — 200 — 381 B — 343 ms — h2https://02179919.akstat.io/02179919.akstat.io/ https://02179919.akstat.io/ — 204 — 225 B — 271 ms — h2blob:https://www.petmd.com/4ba746cd-6e25-495b-b59f-4cf0c6d85ea9www.petmd.com/4ba746cd-6e25-495b-b5... blob:https://www.petmd.com/4ba746cd-6e25-495b-b59f-4cf0c6d85ea9 — 200 — -1 B — 9 ms — blobhttps://www.chewy.com/api/efproa?ci=js/3.12.9&q=uMeW0WfnyLJmtFjTtKZvwww.chewy.com/api/efproa?ci=js/3.12... https://www.chewy.com/api/efproa?ci=js/3.12.9&q=uMeW0WfnyLJmtFjTtKZv — 200 — 1.9 KiB — 224 ms — h2https://bf20861wzf.bf.dynatrace.com/bf?type=js3&sn=v_4_srv_2_sn_T66CQJL79JM8MPB0QU244H4EABQ6R0DF_app-3Acb0f83072f3ae16b_1_ol_0_perc_100000_mul_1_rcs-3Acss_0&svrid=2&flavor=cors&vi=DGVGVOQQRLHVHMCFEEDVAHDHPPPMJKUS-0&modifiedSince=1776709022267&bp=3&app=cb0f83072f3ae16b&crc=4053558300&en=gfsbom3g&end=1bf20861wzf.bf.dynatrace.com/bf?type... https://bf20861wzf.bf.dynatrace.com/bf?type=js3&sn=v_4_srv_2_sn_T66CQJL79JM8MPB0QU244H4EABQ6R0DF_app-3Acb0f83072f3ae16b_1_ol_0_perc_100000_mul_1_rcs-3Acss_0&svrid=2&flavor=cors&vi=DGVGVOQQRLHVHMCFEEDVAHDHPPPMJKUS-0&modifiedSince=1776709022267&bp=3&app=cb0f83072f3ae16b&crc=4053558300&en=gfsbom3g&end=1 — 200 — 380 B — 101 ms — h2https://api.segment.io/v1/tapi.segment.io/v1/t https://api.segment.io/v1/t — 200 — 173 B — 560 ms — h2https://api.segment.io/v1/papi.segment.io/v1/p https://api.segment.io/v1/p — 200 — 172 B — 559 ms — h2https://bf20861wzf.bf.dynatrace.com/bf?type=js3&sn=v_4_srv_2_sn_T66CQJL79JM8MPB0QU244H4EABQ6R0DF_app-3Acb0f83072f3ae16b_1_ol_0_perc_100000_mul_1_rcs-3Acss_0&svrid=2&flavor=cors&vi=DGVGVOQQRLHVHMCFEEDVAHDHPPPMJKUS-0&modifiedSince=1776709022267&bp=3&app=cb0f83072f3ae16b&crc=2921061019&en=gfsbom3g&end=1bf20861wzf.bf.dynatrace.com/bf?type... https://bf20861wzf.bf.dynatrace.com/bf?type=js3&sn=v_4_srv_2_sn_T66CQJL79JM8MPB0QU244H4EABQ6R0DF_app-3Acb0f83072f3ae16b_1_ol_0_perc_100000_mul_1_rcs-3Acss_0&svrid=2&flavor=cors&vi=DGVGVOQQRLHVHMCFEEDVAHDHPPPMJKUS-0&modifiedSince=1776709022267&bp=3&app=cb0f83072f3ae16b&crc=2921061019&en=gfsbom3g&end=1 — 200 — 380 B — 99 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 4541ms · 1573KB · $60/mo
www.chewy.com
Other
Costly
Execution 787ms
Transfer 66 KB
Monthly Cost $10/mo
www.petmd.com
Other
Costly
Execution 779ms
Transfer 29 KB
Monthly Cost $10/mo
Unattributable
Other
Costly
Execution 774ms
Transfer 0 KB
Monthly Cost $10/mo
www.petmd.com
Other
Costly
Execution 496ms
Transfer 42 KB
Monthly Cost $7/mo
js-cdn.dynatrace.com
Other
Costly
Execution 391ms
Transfer 110 KB
Unused 46%
Monthly Cost $5/mo
www.petmd.com
Other
Costly
Execution 285ms
Transfer 1 KB
Monthly Cost $4/mo
www.petmd.com
Other
Costly
Execution 242ms
Transfer 557 KB
Unused 10%
Monthly Cost $3/mo
Google Tag Manager
Tag Manager
Costly
Execution 215ms
Transfer 141 KB
Unused 44%
Monthly Cost $3/mo
Google Tag Manager
Tag Manager
Costly
Execution 202ms
Transfer 173 KB
Unused 41%
Monthly Cost $3/mo
www.petmd.com
Other
Optional
Execution 137ms
Transfer 369 KB
Unused 28%
Monthly Cost $2/mo
www.petmd.com
Other
Optional
Execution 99ms
Transfer 9 KB
Monthly Cost $1/mo
s.go-mpulse.net
Other
Optional
Execution 71ms
Transfer 57 KB
Unused 56%
Monthly Cost $1/mo
Google Analytics
Analytics
Optional
Execution 63ms
Transfer 21 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.chewy.com adds 787ms and costs ~$10/month
  • www.petmd.com adds 779ms and costs ~$10/month
  • Unattributable adds 774ms and costs ~$10/month
  • www.petmd.com adds 496ms and costs ~$7/month
  • js-cdn.dynatrace.com adds 391ms and costs ~$5/month
  • www.petmd.com adds 285ms and costs ~$4/month
  • www.petmd.com adds 242ms and costs ~$3/month
  • Google Tag Manager adds 215ms and costs ~$3/month
  • Google Tag Manager adds 202ms 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.chewy.com takes 787ms 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.petmd.com takes 779ms 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 774ms 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.petmd.com takes 496ms 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

js-cdn.dynatrace.com takes 391ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.

Why this matters

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

Source: web.dev

www.petmd.com takes 285ms 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.petmd.com 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

Google Tag Manager takes 215ms 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 202ms 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

56% of s.go-mpulse.net'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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