Skip to content
https://www.nytimes.com

Performance

· 14 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
66
GRADE
D
FIX
4
REVIEW
3
PASS
5
INFO
2

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

Mobile Desktop
32
Performance Overall performance score (0–100) based on Core Web Vitals and other metrics. 90+ is good.
78
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.
85
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.

1.20 s

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

9.93 s

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

2.96 s

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

0.063

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

7.26 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.

11.31 s

Page Load Progression

2.0 s
4.1 s
6.1 s
8.2 s
10.2 s
12.3 s
14.3 s
16.4 s
Checks
14
5 PASS 3 REVIEW 4 FIX
F
Page Weight Budget
Action
27.7 MB transferred, 355 requests
FIX
27.7 MB transferred, 355 requests
Critical::
Page weighs 40.3 MB (27.7 MB transferred)
Warning::
Images are 4.0 MB — compress or use modern formats
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Got: 4.0 MB
Warning::
JavaScript is 3.6 MB — consider code splitting or lazy loading
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
Got: 3.6 MB
Info::
Fonts are 395 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 395 KB
Warning::
355 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 5.8 g CO2 per page load
27.7 MB / 2.4 MB budget
27.7 MB transferred
355 requests
5.8 g CO2 per page load
Other 18.5 MiB 67%
Images 4.0 MiB 14%
JavaScript 3.6 MiB 13%
Other 417.5 KiB 1%
Other 414.2 KiB 1%
Fonts 395.5 KiB 1%
HTML 315.6 KiB 1%
CSS 88.5 KiB 0%
Other 32.1 KiB 0%
Other 629 B 0%
Other 561 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Over budget

Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.

Why this matters

Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.

Source: web.dev

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

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

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
93% third-party, 0 ms blocking
FIX
93% third-party, 0 ms blocking
Warning::
Third-party code accounts for 93% of page weight (25.8 MiB of 27.7 MiB)
Info::
Third-party blocking time is low (0 ms)
93%
First-party Third-party
F
JS Execution Cost
Action
9983ms total JS execution
FIX
9983ms total JS execution
Warning::
https://www.nytimes.com/vi-assets/static-assets/ma...: 4292ms CPU time
Warning::
https://www.nytimes.com/: 1350ms CPU time
Warning::
Unattributable: 1078ms CPU time
Warning::
https://static01.nyt.com/video-static/betamax/beta...: 710ms CPU time
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 471ms CPU time
Info::
Third-party scripts: 3649ms (37% of total)

Main Thread Breakdown

Script Evaluation 64% Other 17% Style & Layout 7% Script Parsing & Compilation 4% Rendering 3%
ScriptTotalScriptingParse/CompileParty
https://www.nytimes.com/vi-assets/static-assets/main-a199ce4d0aae1f18e1f1.js4292ms3559ms121ms1st
https://www.nytimes.com/1350ms210ms40ms1st
Unattributable1078ms116ms0ms3rd
https://static01.nyt.com/video-static/betamax/betamax-shared-sTKBl65Y.js710ms484ms0ms3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202603310101/pubads_impl.js471ms377ms20ms3rd
https://www.nytimes.com/vi-assets/static-assets/adslot-4321ed7379557de6ae06.js316ms262ms1ms1st
https://warp.media.net/js/tags/clientag.js?cid=8CU26C87G&dn=www.nytimes.com&ysection=home&version=1313ms281ms18ms3rd
https://www.googletagmanager.com/gtm.js?id=GTM-P528B3&gtm_auth=tfAzqo1rYDLgYhmTnSjPqw&gtm_preview=env-130&gtm_cookies_win=x216ms164ms30ms3rd
https://www.nytimes.com/vi-assets/static-assets/vendors~audio~byline~capsule~card~cardpanel~clientSideCapsule~home~livePanel~paidpost~slideshow~vide~2ddd9d4c-113f5b8a83dd67d3884c.js203ms200ms3ms1st
https://static01.nyt.com/video-static/betamax/video-element-lQZyLhgl.js185ms118ms3ms3rd

Showing top 10 of 17 scripts

F
JS Bundles
Action
74 scripts, 1.3 MB unused
FIX
74 scripts, 1.3 MB unused
Warning::
https://www.nytimes.com/vi-assets/static-assets/ma...: 398 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.nytimes.com/vi-assets/static-assets/ho...: 194 KB unused (43%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://static01.nyt.com/video-static/betamax/hlsj...: 140 KB unused (96%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.nytimes.com/vi-assets/static-assets/ve...: 91 KB unused (86%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 84 KB unused (46%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 1.3 MB
1376 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.nytimes.com/vi-assets/static-assets/main-a199ce4d0aae1f18e1f1.js923 KB398 KB (43%)✓1st
https://www.nytimes.com/vi-assets/static-assets/home-ea23c461835fcbe6fad1.js456 KB194 KB (43%)✓1st
https://static01.nyt.com/video-static/betamax/hlsjs-CLmy88XX.js147 KB140 KB (96%)✓3rd
https://www.nytimes.com/vi-assets/static-assets/vendor-a174c85d4d9cb7e7c988.js107 KB91 KB (86%)✓1st
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202603310101/pubads_impl.js182 KB84 KB (46%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-P528B3&gtm_auth=tfAzqo1rYDLgYhmTnSjPqw&gtm_preview=env-130&gtm_cookies_win=x190 KB70 KB (37%)✓3rd
https://accounts.google.com/gsi/client93 KB69 KB (75%)✓3rd
https://warp.media.net/js/tags/clientag.js?cid=8CU26C87G&dn=www.nytimes.com&ysection=home&version=1193 KB68 KB (35%)✓3rd
https://www.googletagmanager.com/gtm.js?id=GTM-N5P6T9S&gtm=4e6411h1117 KB64 KB (54%)✓3rd
https://www.googletagmanager.com/gtag/destination?id=DC-5290727&cx=c&gtm=4e6411h1130 KB60 KB (46%)✓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

B
Image Optimization
90 images, 0 KB saveable
REVIEW
90 images, 0 KB saveable
Info::
All images are well-optimized
90 images 4.0 MB
0 oversized -0 KB
29 legacy format
0 missing dimensions CLS risk
C
Green Hosting
Action
Whether the site is served from green-energy infrastructure
REVIEW

Green Hosting

No green hosting detected

B
HTTP Caching
s-maxage=30,no-cache
REVIEW
s-maxage=30,no-cache
Info::
Cache-Control header is set
Got: s-maxage=30,no-cache
Info::
CDN TTL: 30 seconds (s-maxage=30)
Info::
Last-Modified header present
Cache-Control

s-maxage=30,no-cache

DirectiveValueMeaning
s-maxage30CDN caches for 30 seconds
no-cache—Cache but always revalidate first
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
16 fonts (395 KB)
PASS
16 fonts (395 KB)
Info::
16 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

16

395 KB total

Render-blocking

0

of 16

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 FCP 1.2 s LCP 9.9 shttps://g1.nyt.com/fonts/family/franklin/franklin-normal-700.91eaf6b5642463af4091160b4bbfdfcb.woff2franklin-normal-700.91e... https://g1.nyt.com/fonts/family/franklin/franklin-normal-700.91eaf6b5642463af4091160b4bbfdfcb.woff2 — 20.2 KiB — 0 ms — font-display: swaphttps://g1.nyt.com/fonts/family/franklin/franklin-normal-600.75739ac267f076931c6da9740386ee6b.woff2franklin-normal-600.757... https://g1.nyt.com/fonts/family/franklin/franklin-normal-600.75739ac267f076931c6da9740386ee6b.woff2 — 20.0 KiB — 0 ms — font-display: swaphttps://g1.nyt.com/fonts/family/franklin/franklin-normal-500.0f4aea3d462cdb64748629efcbbf36bc.woff2franklin-normal-500.0f4... https://g1.nyt.com/fonts/family/franklin/franklin-normal-500.0f4aea3d462cdb64748629efcbbf36bc.woff2 — 19.6 KiB — 0 ms — font-display: swaphttps://g1.nyt.com/fonts/family/franklin/franklin-normal-800.fdc7cad17deeec2db1fe2f9f8c0520ed.woff2franklin-normal-800.fdc... https://g1.nyt.com/fonts/family/franklin/franklin-normal-800.fdc7cad17deeec2db1fe2f9f8c0520ed.woff2 — 23.9 KiB — 0 ms — font-display: swaphttps://g1.nyt.com/fonts/family/cheltenham/cheltenham-normal-700.530cfb72378419eedb60da7e266ad5f1.woff2cheltenham-normal-700.5... https://g1.nyt.com/fonts/family/cheltenham/cheltenham-normal-700.530cfb72378419eedb60da7e266ad5f1.woff2 — 28.1 KiB — 0 ms — font-display: swaphttps://g1.nyt.com/fonts/family/imperial/imperial-normal-400.6131cd77b6e216c7693ed925f4309ffc.woff2imperial-normal-400.613... https://g1.nyt.com/fonts/family/imperial/imperial-normal-400.6131cd77b6e216c7693ed925f4309ffc.woff2 — 26.1 KiB — 0 ms — font-display: swaphttps://g1.nyt.com/fonts/family/cheltenham/cheltenham-normal-400.a3ed7afe3eaa0a873f3fbd379f8c491b.woff2cheltenham-normal-400.a... https://g1.nyt.com/fonts/family/cheltenham/cheltenham-normal-400.a3ed7afe3eaa0a873f3fbd379f8c491b.woff2 — 28.6 KiB — 0 ms — font-display: swaphttps://g1.nyt.com/fonts/family/cheltenham/cheltenham-normal-300.7ea91ebd036309e1fe756ee3aab272da.woff2cheltenham-normal-300.7... https://g1.nyt.com/fonts/family/cheltenham/cheltenham-normal-300.7ea91ebd036309e1fe756ee3aab272da.woff2 — 26.9 KiB — 0 ms — font-display: swaphttps://g1.nyt.com/fonts/family/cheltenham-small/cheltenham-small-normal-700.1a0b316424cdebd18086b8dbbc768eef.woff2cheltenham-small-normal... https://g1.nyt.com/fonts/family/cheltenham-small/cheltenham-small-normal-700.1a0b316424cdebd18086b8dbbc768eef.woff2 — 23.6 KiB — 0 ms — font-display: swaphttps://g1.nyt.com/fonts/family/cheltenham-text-cond/cheltenham-text-cond-normal-700.7e78f9e7e6c2e02d82592c4466929fa3.woff2cheltenham-text-cond-no... https://g1.nyt.com/fonts/family/cheltenham-text-cond/cheltenham-text-cond-normal-700.7e78f9e7e6c2e02d82592c4466929fa3.woff2 — 28.4 KiB — 0 ms — font-display: swaphttps://g1.nyt.com/fonts/family/karnak/karnak-normal-700.4a0c7e79ac2f009f12f9106482c961c4.woff2karnak-normal-700.4a0c7... https://g1.nyt.com/fonts/family/karnak/karnak-normal-700.4a0c7e79ac2f009f12f9106482c961c4.woff2 — 23.1 KiB — 0 ms — font-display: swaphttps://g1.nyt.com/fonts/family/cheltenham-small/cheltenham-small-italic-400.cdfa0ec29cca8c2d2f54c79d898e15c1.woff2cheltenham-small-italic... https://g1.nyt.com/fonts/family/cheltenham-small/cheltenham-small-italic-400.cdfa0ec29cca8c2d2f54c79d898e15c1.woff2 — 23.9 KiB — 0 ms — font-display: swaphttps://static01.nytimes.com/ads/adplatforms/fonts/random1/franklin-normal-700.ttffranklin-normal-700.ttf https://static01.nytimes.com/ads/adplatforms/fonts/random1/franklin-normal-700.ttf — 27.4 KiB — 0 ms — font-display: swaphttps://fonts.gstatic.com/s/sourcesanspro/v23/6xK3dSBYKcSV-LCoeQqfX1RYOo3qOK7l.woff26xK3dSBYKcSV-LCoeQqfX1R... https://fonts.gstatic.com/s/sourcesanspro/v23/6xK3dSBYKcSV-LCoeQqfX1RYOo3qOK7l.woff2 — 14.5 KiB — 0 ms — font-display: swaphttps://static01.nytimes.com/ads/adplatforms/fonts/random1/franklin_normal_500.ttffranklin_normal_500.ttf https://static01.nytimes.com/ads/adplatforms/fonts/random1/franklin_normal_500.ttf — 26.4 KiB — 0 ms — font-display: swaphttps://static01.nytimes.com/ads/adplatforms/fonts/random1/cheltenham_normal_300.ttfcheltenham_normal_300.ttf https://static01.nytimes.com/ads/adplatforms/fonts/random1/cheltenham_normal_300.ttf — 34.5 KiB — 0 ms — font-display: swap
franklin-normal-700.91e... woff2 swap
Size 20 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
franklin-normal-600.757... woff2 swap
Size 20 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
franklin-normal-500.0f4... woff2 swap
Size 20 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
franklin-normal-800.fdc... woff2 swap
Size 24 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
cheltenham-normal-700.5... woff2 swap
Size 28 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
imperial-normal-400.613... woff2 swap
Size 26 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
cheltenham-normal-400.a... woff2 swap
Size 29 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
cheltenham-normal-300.7... woff2 swap
Size 27 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
cheltenham-small-normal... woff2 swap
Size 24 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
cheltenham-text-cond-no... woff2 swap
Size 28 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
karnak-normal-700.4a0c7... woff2 swap
Size 23 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
cheltenham-small-italic... woff2 swap
Size 24 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
franklin-normal-700.ttf ttf swap
Size 27 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
6xK3dSBYKcSV-LCoeQqfX1R... woff2 swap
Size 15 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
franklin_normal_500.ttf ttf swap
Size 26 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
cheltenham_normal_300.ttf ttf swap
Size 35 KB
Load time 0 ms
Start 0 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
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)

Fixing the unchecked items could save ~27 KB and ~54 ms

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
Network Waterfall
355 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
37% of JavaScript execution is third-party
First-party Third-party 3649ms · 958KB · €40/mo
Unattributable
Other
Costly
Execution 1078ms
Transfer 0 KB
Monthly Cost €12/mo
static01.nyt.com
Other
Costly
Execution 710ms
Transfer 21 KB
Monthly Cost €8/mo
securepubads.g.doubleclick.net
Other
Costly
Execution 471ms
Transfer 182 KB
Unused 46%
Monthly Cost €5/mo
warp.media.net
Other
Costly
Execution 313ms
Transfer 193 KB
Unused 35%
Monthly Cost €3/mo
Google Tag Manager
Tag Manager
Costly
Execution 216ms
Transfer 190 KB
Unused 37%
Monthly Cost €2/mo
static01.nyt.com
Other
Optional
Execution 185ms
Transfer 1 KB
Monthly Cost €2/mo
dd.nytimes.com
Other
Optional
Execution 156ms
Transfer 43 KB
Monthly Cost €2/mo
c.amazon-adsystem.com
Other
Optional
Execution 129ms
Transfer 90 KB
Unused 40%
Monthly Cost €1/mo
www.datadoghq-browser-agent.com
Other
Optional
Execution 126ms
Transfer 58 KB
Unused 49%
Monthly Cost €1/mo
Google Tag Manager
Tag Manager
Optional
Execution 103ms
Transfer 130 KB
Unused 46%
Monthly Cost €1/mo
static01.nyt.com
Other
Optional
Execution 100ms
Transfer 13 KB
Monthly Cost €1/mo
securepubads.g.doubleclick.net
Other
Optional
Execution 62ms
Transfer 34 KB
Unused 70%
Monthly Cost €1/mo

These scripts may cost more than they're worth

  • Unattributable adds 1078ms and costs ~€12/month
  • static01.nyt.com adds 710ms and costs ~€8/month
  • securepubads.g.doubleclick.net adds 471ms and costs ~€5/month
  • warp.media.net adds 313ms and costs ~€3/month
  • Google Tag Manager adds 216ms and costs ~€2/month

Unattributable takes 1078ms 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

static01.nyt.com takes 710ms 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

securepubads.g.doubleclick.net takes 471ms 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

warp.media.net takes 313ms 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 216ms 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

70% of securepubads.g.doubleclick.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.

Send Feedback