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https://www.doordash.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
91
GRADE
A
FIX
1
REVIEW
2
PASS
9
INFO
2

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

Mobile Desktop
98
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
90
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.
40
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.

318 ms

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

1.01 s

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

75 ms

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

0.001

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

500 ms

Time to Interactive Time to Interactive — how long until the page is fully interactive and responds to user input. Under 3.8s is good.

1.01 s

Page Load Progression

443 ms
885 ms
1.3 s
1.8 s
2.2 s
2.7 s
3.1 s
3.5 s
Checks
14
9 PASS 2 REVIEW 1 FIX
D
HTTP Caching
Action
no-store (uncacheable)
FIX
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Info::
No ETag or Last-Modified header
Conditional requests (304 Not Modified) are not possible without validators.
Cache-Control

private, max-age=0, no-store, no-cache, must-revalidate, post-check=0, pre-check=0

DirectiveValueMeaning
private—Only browser cache, not CDN/proxy
max-age0Cache for 0 seconds
no-store—Never cache this response
no-cache—Cache but always revalidate first
must-revalidate—Must recheck with server after expiry
post-check0
pre-check0
B
Third-Party Impact
48% third-party, 0 ms blocking
REVIEW
48% third-party, 0 ms blocking
Info::
Third-party code accounts for 48% of page weight (409.6 KiB of 844.8 KiB)
Info::
Third-party blocking time is low (0 ms)
52%
48%
First-party Third-party
B
JS Execution Cost
554ms total JS execution
REVIEW
554ms total JS execution
Warning::
https://www.doordash.com/cdn-cgi/challenge-platfor...: 468ms CPU time
Info::
Unattributable: 85ms CPU time
Info::
Third-party scripts: 85ms (15% of total)

Main Thread Breakdown

Script Evaluation 77% Other 16%
ScriptTotalScriptingParse/CompileParty
https://www.doordash.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9e8ba3fe7c055ea2468ms451ms6ms1st
Unattributable85ms1ms0ms3rd
A
Page Weight Budget
845 KB transferred, 21 requests
PASS
845 KB transferred, 21 requests
Info::
Page weighs 2.4 MB (845 KB transferred)
Info::
21 HTTP requests
Info::
Estimated 0.17 g CO2 per page load
845 KB / 2.4 MB budget
845 KB transferred
21 requests
0.17 g CO2 per page load
Other 302.1 KiB 36%
Other 277.2 KiB 33%
HTML 100.2 KiB 12%
JavaScript 99.0 KiB 12%
Images 64.7 KiB 8%
Other 1.7 KiB 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
Image Optimization
3 images, 0 KB saveable
PASS
3 images, 0 KB saveable
Info::
All images are well-optimized
3 images 65 KB
0 oversized -0 KB
3 legacy format
0 missing dimensions CLS risk
A+
Font Loading
No web fonts (system fonts)
PASS
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+
JS Bundles
9 scripts, 21 KB unused
PASS
9 scripts, 21 KB unused
Warning::
https://www.doordash.com/cdn-cgi/challenge-platfor...: 21 KB unused (29%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 21 KB
21 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.doordash.com/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=9e8ba3fe7c055ea275 KB21 KB (29%)✓1st
https://static.cloudflareinsights.com/beacon.min.js/vcd15cbe7772f49c399c6a5babf22c12417176891760157 KB—✓3rd
blob:https://www.doordash.com/d1c6c62f-24ec-48e1-8c42-cf5f99d8571d0 KB—✓3rd
https://challenges.cloudflare.com/turnstile/v0/b/625261456364/api.js?onload=OBvX9&render=explicit17 KB—✓3rd
blob:https://www.doordash.com/78fa7c87-6877-433a-93e7-ffd71d967e35-0 KB—✓3rd
blob:https://challenges.cloudflare.com/d1e1d563-bfa8-4938-a669-a2237ee8378f0 KB—✓3rd
blob:https://challenges.cloudflare.com/57c0d24f-1789-436f-b853-e894ee16d6e2-0 KB—✓3rd
blob:https://challenges.cloudflare.com/57c0d24f-1789-436f-b853-e894ee16d6e2-0 KB—✓3rd
blob:https://challenges.cloudflare.com/1154c028-2fa9-4127-ae36-38d47531a734-0 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

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: Cloudflare

Network Waterfall
21 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
15% of JavaScript execution is third-party
First-party Third-party 85ms · 0KB · $1/mo
Unattributable
Other
Optional
Execution 85ms
Transfer 0 KB
Monthly Cost $1/mo

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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