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https://heinz.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
72
GRADE
C
FIX
5
REVIEW
1
PASS
6
INFO
2

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

Mobile Desktop
34
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
97
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.

626 ms

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

14.20 s

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

2.39 s

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

0.071

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

5.29 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.

14.22 s

Page Load Progression

1.1 s
2.2 s
3.3 s
4.4 s
5.5 s
6.6 s
7.7 s
8.7 s
Checks
14
6 PASS 1 REVIEW 5 FIX
F
Page Weight Budget
Action
16.6 MB transferred, 116 requests
FIX
16.6 MB transferred, 116 requests
Critical::
Page weighs 37.0 MB (16.6 MB transferred)
Warning::
JavaScript is 2.7 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 2.7 MB
Warning::
116 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 3.5 g CO2 per page load
16.6 MB / 2.4 MB budget
16.6 MB transferred
116 requests
3.5 g CO2 per page load
Other 11.7 MiB 71%
JavaScript 2.7 MiB 16%
Other 1.4 MiB 8%
Images 530.5 KiB 3%
Fonts 147.8 KiB 1%
CSS 91.3 KiB 1%
HTML 83.2 KiB 0%
Other 33.6 KiB 0%
Other 10.8 KiB 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

Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.

Why this matters

High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.

Source: web.dev

D
Third-Party Impact
Action
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (16.6 MiB of 16.6 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
7609ms total JS execution
FIX
7609ms total JS execution
Warning::
https://www.heinz.com/_next/static/chunks/pages/_a...: 4637ms CPU time
Warning::
https://www.heinz.com/_next/static/chunks/framewor...: 977ms CPU time
Warning::
Unattributable: 605ms CPU time
Warning::
https://www.heinz.com/: 570ms CPU time
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 315ms CPU time
Warning::
Third-party scripts: 7609ms (100% of total)

Main Thread Breakdown

Script Evaluation 77% Other 13% Style & Layout 4% Script Parsing & Compilation 3%
ScriptTotalScriptingParse/CompileParty
https://www.heinz.com/_next/static/chunks/pages/_app-021bc8e57d69aaf0.js4637ms4381ms141ms3rd
https://www.heinz.com/_next/static/chunks/framework-5b26dd83b6598aeb.js977ms808ms13ms3rd
Unattributable605ms29ms0ms3rd
https://www.heinz.com/570ms5ms0ms3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js315ms269ms27ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-W2PBNCL&gtm_auth=&gtm_preview=&gtm_cookies_win=x224ms200ms16ms3rd
https://cdn-ukwest.onetrust.com/scripttemplates/202602.1.0/otBannerSdk.js130ms63ms13ms3rd
https://www.googletagmanager.com/gtag/js?id=G-ZVECF4LTHB&cx=c&gtm=4e6461h1100ms87ms12ms3rd
https://www.heinz.com/_next/static/chunks/main-297f0f0aec7883c6.js52ms42ms9ms3rd
F
JS Bundles
Action
53 scripts, 1.4 MB unused
FIX
53 scripts, 1.4 MB unused
Warning::
https://www.heinz.com/_next/static/chunks/pages/_a...: 785 KB unused (66%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 160 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 160 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/kUYUkUl...: 160 KB unused (44%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://cdn-ukwest.onetrust.com/scripttemplates/20...: 68 KB unused (52%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.4 MB
1481 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.heinz.com/_next/static/chunks/pages/_app-021bc8e57d69aaf0.js1199 KB785 KB (66%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js0 KB160 KB (44%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js363 KB160 KB (44%)✓3rd
https://www.gstatic.com/recaptcha/releases/kUYUkUlSyqkjTSMaN2w3RaOh/recaptcha__en.js363 KB160 KB (44%)✓3rd
https://cdn-ukwest.onetrust.com/scripttemplates/202602.1.0/otBannerSdk.js129 KB68 KB (52%)✓3rd
https://www.googletagmanager.com/gtag/js?id=G-ZVECF4LTHB&cx=c&gtm=4e6461h1163 KB65 KB (40%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-W2PBNCL&gtm_auth=&gtm_preview=&gtm_cookies_win=x180 KB55 KB (31%)✓3rd
https://www.heinz.com/_next/static/chunks/374-a499b55f3fa41d02.js29 KB27 KB (94%)✓3rd
https://cdn-ukwest.onetrust.com/scripttemplates/otSDKStub.js?did=98163a3e-f400-4c61-8d40-747a07bc5c498 KB—✓3rd
https://www.heinz.com/_next/static/chunks/framework-5b26dd83b6598aeb.js56 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
HTTP Caching
Action
No cache headers
FIX
No cache headers
Warning::
No Cache-Control header found
Browsers will use heuristic caching, which can be unpredictable. Set explicit cache headers.

No Cache-Control header

Adding a Cache-Control header can significantly improve repeat-visit performance.

B
Image Optimization
17 images, 0 KB saveable
REVIEW
17 images, 0 KB saveable
Info::
All images are well-optimized
17 images 530 KB
0 oversized -0 KB
6 legacy format
0 missing dimensions CLS risk
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 (148 KB)
PASS
6 fonts (148 KB)
Info::
6 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

6

148 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 2.0 s 4.0 s 6.0 s 8.0 s 10.0 s 12.0 s 14.0 s FCP 626 ms LCP 14.2 shttps://cdn.fonts.net/kit/0a682da4-5fd9-4154-b6ac-2e12ce359d80/HeinzLabel/HeinzLabelBold_normal_normal.woff2HeinzLabelBold_normal_n... https://cdn.fonts.net/kit/0a682da4-5fd9-4154-b6ac-2e12ce359d80/HeinzLabel/HeinzLabelBold_normal_normal.woff2 — 19.7 KiB — 0 ms — font-display: swaphttps://cdn.fonts.net/kit/0a682da4-5fd9-4154-b6ac-2e12ce359d80/HeinzSans/HeinzSansRegular_normal_normal.woff2HeinzSansRegular_normal... https://cdn.fonts.net/kit/0a682da4-5fd9-4154-b6ac-2e12ce359d80/HeinzSans/HeinzSansRegular_normal_normal.woff2 — 16.0 KiB — 0 ms — font-display: swaphttps://cdn.fonts.net/kit/0a682da4-5fd9-4154-b6ac-2e12ce359d80/HeinzSans/HeinzSansBold_normal_normal.woff2HeinzSansBold_normal_no... https://cdn.fonts.net/kit/0a682da4-5fd9-4154-b6ac-2e12ce359d80/HeinzSans/HeinzSansBold_normal_normal.woff2 — 15.8 KiB — 0 ms — font-display: swaphttps://cdn.fonts.net/kit/0a682da4-5fd9-4154-b6ac-2e12ce359d80/HeinzSans/HeinzSansBlack_normal_normal.woff2HeinzSansBlack_normal_n... https://cdn.fonts.net/kit/0a682da4-5fd9-4154-b6ac-2e12ce359d80/HeinzSans/HeinzSansBlack_normal_normal.woff2 — 16.3 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 0 ms — font-display: swaphttps://cdn.fonts.net/kit/335655b0-0dd3-11ed-9831-02c6998740a0/Intro/IntroRegular_normal_normal.woff2IntroRegular_normal_nor... https://cdn.fonts.net/kit/335655b0-0dd3-11ed-9831-02c6998740a0/Intro/IntroRegular_normal_normal.woff2 — 46.2 KiB — 0 ms — font-display: swap
HeinzLabelBold_normal_n... woff2 swap
Size 20 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
HeinzSansRegular_normal... woff2 swap
Size 16 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
HeinzSansBold_normal_no... woff2 swap
Size 16 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
HeinzSansBlack_normal_n... woff2 swap
Size 16 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
IntroRegular_normal_nor... woff2 swap
Size 46 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
Optimization checklist
  • Preload critical fonts (priority=high)
  • Use woff2 format for all fonts
  • Set font-display to swap, optional, or fallback
  • Subset large fonts (≤100 KB each)
A+
Resource Caching
All resources properly cached
PASS
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+
Critical Rendering Path
No render-blocking resources
PASS
No render-blocking resources
Info::
No render-blocking resources detected
A+
Resource Hints
No optimization needed
PASS
No optimization needed
Info::
No resource hint issues
A+
Green Hosting
Whether the site is served from green-energy infrastructure
PASS

Green Hosting

This site is hosted on green energy infrastructure

Provider: Google Cloud

Network Waterfall
116 requests over 0ms
INFO

Performance analysis not available for this result.

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 7609ms · 1817KB · $131/mo
www.heinz.com
Other
Costly
Execution 4637ms
Transfer 1199 KB
Unused 66%
Monthly Cost $80/mo
www.heinz.com
Other
Costly
Execution 977ms
Transfer 56 KB
Monthly Cost $17/mo
Unattributable
Other
Costly
Execution 605ms
Transfer 0 KB
Monthly Cost $10/mo
www.heinz.com
Other
Costly
Execution 570ms
Transfer 53 KB
Monthly Cost $10/mo
www.gstatic.com
Other
Costly
Execution 315ms
Transfer 0 KB
Unused 44%
Monthly Cost $5/mo
Google Tag Manager
Tag Manager
Costly
Execution 224ms
Transfer 180 KB
Unused 31%
Monthly Cost $4/mo
cdn-ukwest.onetrust.com
Other
Optional
Execution 130ms
Transfer 129 KB
Unused 52%
Monthly Cost $2/mo
Google Tag Manager
Tag Manager
Optional
Execution 100ms
Transfer 163 KB
Unused 40%
Monthly Cost $2/mo
www.heinz.com
Other
Optional
Execution 52ms
Transfer 38 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • www.heinz.com adds 4637ms and costs ~$80/month
  • www.heinz.com adds 977ms and costs ~$17/month
  • Unattributable adds 605ms and costs ~$10/month
  • www.heinz.com adds 570ms and costs ~$10/month
  • www.gstatic.com adds 315ms and costs ~$5/month
  • Google Tag Manager adds 224ms 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.heinz.com takes 4637ms 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

66% of www.heinz.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

www.heinz.com takes 977ms 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 605ms 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.heinz.com takes 570ms 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.gstatic.com takes 315ms 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 224ms 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

52% of cdn-ukwest.onetrust.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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