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https://runnersworld.com

Performance

· 17 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.
SCORE
69
GRADE
D
FIX
5
REVIEW
3
PASS
7
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.
95
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.
100
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.

2.95 s

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

6.61 s

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

1.58 s

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

0.011

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

3.68 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.

20.33 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
7 PASS 3 REVIEW 5 FIX
F
Page Weight Budget
Action
2.9 MB transferred, 128 requests
FIX
2.9 MB transferred, 128 requests
Warning::
Page weighs 8.1 MB (2.9 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::
Fonts are 214 KB — consider subsetting or using system fonts
Subset fonts to include only used characters, or switch to system font stacks.
Got: 214 KB
Warning::
128 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.61 g CO2 per page load
2.9 MB / 2.4 MB budget
2.9 MB transferred
128 requests
0.61 g CO2 per page load
JavaScript 1.7 MiB 59%
Images 519.8 KiB 18%
Fonts 213.5 KiB 7%
Other 159.4 KiB 5%
HTML 144.9 KiB 5%
CSS 118.3 KiB 4%
Other 64.0 KiB 2%
Other 0 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

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
100% third-party, 0 ms blocking
FIX
100% third-party, 0 ms blocking
Warning::
Third-party code accounts for 100% of page weight (2.9 MiB of 2.9 MiB)
Info::
Third-party blocking time is low (0 ms)
100%
First-party Third-party
F
JS Execution Cost
Action
5442ms total JS execution
FIX
5442ms total JS execution
Warning::
Unattributable: 911ms CPU time
Warning::
https://www.runnersworld.com/_assets/fre/scopes/hd...: 811ms CPU time
Warning::
https://www.runnersworld.com/_assets/fre/scopes/hd...: 804ms CPU time
Warning::
https://www.runnersworld.com/: 714ms CPU time
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 656ms CPU time
Warning::
Third-party scripts: 5442ms (100% of total)

Main Thread Breakdown

Script Evaluation 64% Other 16% Style & Layout 9% Script Parsing & Compilation 6%
ScriptTotalScriptingParse/CompileParty
Unattributable911ms114ms0ms3rd
https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/framework-81603682134898a6.js811ms684ms3ms3rd
https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/pages/_templates/feed-2ac9a8ad0d959ea6.js804ms781ms4ms3rd
https://www.runnersworld.com/714ms23ms6ms3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js656ms565ms78ms3rd
https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/97303.1ca54da8983d469f.js185ms161ms1ms3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js?cb=31097945152ms106ms41ms3rd
https://www.runnersworld.com/_assets/moapt/2.437.0/moapt-bidder-pb-hdm.10.23.0.js146ms119ms24ms3rd
https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/1511.1ffb99aaa9594439.js143ms110ms2ms3rd
https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/45689.b575763ebb590129.js137ms129ms1ms3rd

Showing top 10 of 20 scripts

F
JS Bundles
Action
78 scripts, 874 KB unused
FIX
78 scripts, 874 KB unused
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.gstatic.com/recaptcha/releases/gTpTIWh...: 177 KB unused (49%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://securepubads.g.doubleclick.net/pagead/mana...: 142 KB unused (76%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://www.runnersworld.com/_assets/moapt/2.437.0...: 85 KB unused (79%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 874 KB
874 KB unused JavaScript

Downloaded but never executed on this page.

ScriptSizeUnusedMinifiedParty
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js0 KB177 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js362 KB177 KB (49%)✓3rd
https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js362 KB177 KB (49%)✓3rd
https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js?cb=31097945188 KB142 KB (76%)✓3rd
https://www.runnersworld.com/_assets/moapt/2.437.0/moapt-bidder-pb-hdm.10.23.0.js108 KB85 KB (79%)✓3rd
https://www.runnersworld.com/_assets/moapt/2.437.0/moapt-bundle-hdm.js58 KB47 KB (83%)✓3rd
https://www.runnersworld.com/_assets/moapt/2.437.0/moapt-data.js53 KB47 KB (89%)✓3rd
https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/74011-55fecbe15c571fd6.js43 KB21 KB (49%)✓3rd
https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/87326-68fb888044736b0f.js3 KB—✓3rd
https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/35150.b57d156d52327677.js2 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
128 resources · 2.9 MB · 874 KB savings available
FIX
128 resources · 2.9 MB · 874 KB savings available
Warning::
Page weight 1.9 MB over 1MB target
Got: 2.9 MB Expected: ≤ 1 MB
Info::
~874 KB of savings available
Warning::
127 third-party resources (100% of weight)
Info::
2 resources over 200KB
128 resources · 2.9 MiB · 127 third-party 1.9 MiB over 1MB target
JavaScript 60% · 1.7 MiB
Image 18% · 532.8 KiB
Document 8% · 242.5 KiB
Font 7% · 213.5 KiB
CSS 4% · 118.3 KiB
Other 3% · 87.4 KiB

~874.4 KiB of savings available

Remove unused JavaScript: 874.4 KiB
C
Image Optimization
Action
28 images, 0 KB saveable
REVIEW
28 images, 0 KB saveable
Warning::
https://hips.hearstapps.com/hmg-prod/images/efcd3d... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://hips.hearstapps.com/hmg-prod/images/7f2fc4... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://hips.hearstapps.com/hmg-prod/images/439da0... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://hips.hearstapps.com/hmg-prod/images/78c524... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://hips.hearstapps.com/hmg-prod/images/32c958... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://hips.hearstapps.com/hmg-prod/images/2aeccb... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://hips.hearstapps.com/hmg-prod/images/6b7b3d... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://hips.hearstapps.com/hmg-prod/images/5368a9... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://hips.hearstapps.com/hmg-prod/images/39a11f... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://hips.hearstapps.com/hmg-prod/images/a2e17d... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://hips.hearstapps.com/hmg-prod/images/3b9808... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://hips.hearstapps.com/hmg-prod/images/6e44af... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
Warning::
https://www.runnersworld.com/_assets/design-tokens... is missing width/height — may cause layout shift
Set explicit width and height to prevent CLS.
28 images 520 KB
0 oversized -0 KB
5 legacy format
14 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

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

Performance issues directly impact user engagement and conversion rates.

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

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

max-age=0, must-revalidate, private

DirectiveValueMeaning
max-age0Cache for 0 seconds
must-revalidate—Must recheck with server after expiry
private—Only browser cache, not CDN/proxy
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
7 fonts (214 KB)
PASS
7 fonts (214 KB)
Info::
7 font(s) use font-display: swap (FOUT risk but functional)

Web fonts

7

214 KB total

Render-blocking

0

of 7

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 3.0 s LCP 6.6 shttps://www.runnersworld.com/_assets/design-tokens/runnersworld/static/fonts/LeagueGothic.6a59e12.woff2LeagueGothic.6a59e12.woff2 https://www.runnersworld.com/_assets/design-tokens/runnersworld/static/fonts/LeagueGothic.6a59e12.woff2 — 10.9 KiB — 109 ms — font-display: swaphttps://www.runnersworld.com/_assets/design-tokens/fre/static/fonts/inter-v3-latin-700.8b8011b.woff2inter-v3-latin-700.8b80... https://www.runnersworld.com/_assets/design-tokens/fre/static/fonts/inter-v3-latin-700.8b8011b.woff2 — 18.2 KiB — 9 ms — font-display: swaphttps://www.runnersworld.com/_assets/design-tokens/runnersworld/static/fonts/FuturaNowTextExtraBold.dbc897f.woff2FuturaNowTextExtraBold.... https://www.runnersworld.com/_assets/design-tokens/runnersworld/static/fonts/FuturaNowTextExtraBold.dbc897f.woff2 — 48.4 KiB — 9 ms — font-display: swaphttps://www.runnersworld.com/_assets/design-tokens/runnersworld/static/fonts/6de96ad7-2385-4636-a13f-21b65d08cd2a.b113566.woff6de96ad7-2385-4636-a13f... https://www.runnersworld.com/_assets/design-tokens/runnersworld/static/fonts/6de96ad7-2385-4636-a13f-21b65d08cd2a.b113566.woff — 37.4 KiB — 10 ms — font-display: swaphttps://www.runnersworld.com/_assets/design-tokens/fre/static/fonts/inter-v3-latin-regular.c8ad008.woff2inter-v3-latin-regular.... https://www.runnersworld.com/_assets/design-tokens/fre/static/fonts/inter-v3-latin-regular.c8ad008.woff2 — 17.4 KiB — 13 ms — font-display: swaphttps://www.runnersworld.com/_assets/design-tokens/runnersworld/static/fonts/FuturaNowTextMedium.2993055.woff2FuturaNowTextMedium.299... https://www.runnersworld.com/_assets/design-tokens/runnersworld/static/fonts/FuturaNowTextMedium.2993055.woff2 — 47.4 KiB — 10 ms — font-display: swaphttps://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2KFO7CnqEu92Fr1ME7kSn66a... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 33.9 KiB — 86 ms — font-display: swap
LeagueGothic.6a59e12.woff2 woff2 swap
Size 11 KB
Load time 109 ms
Start 50 ms
Risk FOUT — text flashes from fallback to web font
inter-v3-latin-700.8b80... woff2 swap
Size 18 KB
Load time 9 ms
Start 251 ms
Risk FOUT — text flashes from fallback to web font
FuturaNowTextExtraBold.... woff2 swap
Size 48 KB
Load time 9 ms
Start 252 ms
Risk FOUT — text flashes from fallback to web font
6de96ad7-2385-4636-a13f... woff swap
Size 37 KB
Load time 10 ms
Start 253 ms
Risk FOUT — text flashes from fallback to web font
  • Convert to woff2 for ~30% smaller file size
inter-v3-latin-regular.... woff2 swap
Size 17 KB
Load time 13 ms
Start 254 ms
Risk FOUT — text flashes from fallback to web font
FuturaNowTextMedium.299... woff2 swap
Size 47 KB
Load time 10 ms
Start 254 ms
Risk FOUT — text flashes from fallback to web font
KFO7CnqEu92Fr1ME7kSn66a... woff2 swap
Size 34 KB
Load time 86 ms
Start 2.0 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)

Fixing the unchecked items could save ~11 KB and ~22 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
2 hints, 0 missing preconnects
PASS
2 hints, 0 missing preconnects
Info::
Page uses 2 resource hint(s)

Current Resource Hints

preconnect
—
preload
1
dns-prefetch
—
prefetch
1

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
Network Waterfall
128 requests over 2170ms
INFO
0 ms 1.0 s 2.0 s 3.0 s 4.0 s 5.0 s 6.0 s FCP 3.0 s LCP 6.6 shttps://runnersworld.com// https://runnersworld.com/ — 301 — 384 B — 11 ms — h2https://www.runnersworld.com/www.runnersworld.com/ https://www.runnersworld.com/ — 200 — 117.2 KiB — 12 ms — h2https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/webpack-6a36650e379a6b61.jswww.runnersworld.com/_assets/fre/sc... https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/webpack-6a36650e379a6b61.js — 200 — 13.0 KiB — 15 ms — h2https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/framework-81603682134898a6.jswww.runnersworld.com/_assets/fre/sc... https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/framework-81603682134898a6.js — 200 — 13.7 KiB — 15 ms — h2https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/main-d2f686aa31e32b32.jswww.runnersworld.com/_assets/fre/sc... https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/main-d2f686aa31e32b32.js — 200 — 41.6 KiB — 33 ms — h2https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/pages/_templates/feed-2ac9a8ad0d959ea6.jswww.runnersworld.com/_assets/fre/sc... https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/pages/_templates/feed-2ac9a8ad0d959ea6.js — 200 — 14.9 KiB — 20 ms — h2https://www.runnersworld.com/api/styles.css?id=b7e824bb-97a6-4b37-8dd3-5412528c481b&type=section&source=section%3Acustomwww.runnersworld.com/api/styles.css... https://www.runnersworld.com/api/styles.css?id=b7e824bb-97a6-4b37-8dd3-5412528c481b&type=section&source=section%3Acustom — 200 — 34.4 KiB — 141 ms — h2https://cdn.cookielaw.org/scripttemplates/otSDKStub.jscdn.cookielaw.org/scripttemplates/o... https://cdn.cookielaw.org/scripttemplates/otSDKStub.js — -1 — 0 B — 252 ms — https://www.runnersworld.com/_assets/moapt/2.437.0/moapt-data.jswww.runnersworld.com/_assets/moapt/... https://www.runnersworld.com/_assets/moapt/2.437.0/moapt-data.js — 200 — 53.4 KiB — 114 ms — h3https://www.runnersworld.com/_assets/moapt/2.437.0/moapt-bundle-hdm.jswww.runnersworld.com/_assets/moapt/... https://www.runnersworld.com/_assets/moapt/2.437.0/moapt-bundle-hdm.js — 200 — 57.7 KiB — 128 ms — h3https://www.runnersworld.com/_assets/design-tokens/runnersworld/static/fonts/LeagueGothic.6a59e12.woff2www.runnersworld.com/_assets/design... https://www.runnersworld.com/_assets/design-tokens/runnersworld/static/fonts/LeagueGothic.6a59e12.woff2 — 200 — 10.9 KiB — 109 ms — h3https://www.runnersworld.com/_assets/design-tokens/runnersworld/static/images/logos/logo.bac833a.svg?primary=%2523000000www.runnersworld.com/_assets/design... https://www.runnersworld.com/_assets/design-tokens/runnersworld/static/images/logos/logo.bac833a.svg?primary=%2523000000 — 200 — 2.1 KiB — 109 ms — h3https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/24084.a9b6c9b257c4fed5.jswww.runnersworld.com/_assets/fre/sc... https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/24084.a9b6c9b257c4fed5.js — 200 — 3.6 KiB — 105 ms — h3https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/18492.e0fee10d4d6d64a0.jswww.runnersworld.com/_assets/fre/sc... https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/18492.e0fee10d4d6d64a0.js — 200 — 4.7 KiB — 99 ms — h3https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/79189-7f9d3cffaa525262.jswww.runnersworld.com/_assets/fre/sc... https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/79189-7f9d3cffaa525262.js — 200 — 3.0 KiB — 94 ms — h3https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/78999.a21b4fe0557146d0.jswww.runnersworld.com/_assets/fre/sc... 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h2https://hips.hearstapps.com/hmg-prod/images/2aeccb23-67b9-429f-af27-eb9a82448c2f.jpeg?crop=0.666750948167xw:1xh;center,top&resize=360:*hips.hearstapps.com/hmg-prod/images... https://hips.hearstapps.com/hmg-prod/images/2aeccb23-67b9-429f-af27-eb9a82448c2f.jpeg?crop=0.666750948167xw:1xh;center,top&resize=360:* — 200 — 30.9 KiB — 29 ms — h2https://hips.hearstapps.com/hmg-prod/images/6e44aff0-7dbf-4049-a33f-45d93faed859.jpeg?crop=0.666564605021xw:1xh;center,top&resize=360:*hips.hearstapps.com/hmg-prod/images... https://hips.hearstapps.com/hmg-prod/images/6e44aff0-7dbf-4049-a33f-45d93faed859.jpeg?crop=0.666564605021xw:1xh;center,top&resize=360:* — 200 — 30.6 KiB — 26 ms — h2https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/32567.77c6be1206ee852f.jswww.runnersworld.com/_assets/fre/sc... https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/chunks/32567.77c6be1206ee852f.js — 200 — 4.1 KiB — 12 ms — h3https://heimdall.hearstapps.com/voltronheimdall.hearstapps.com/voltron https://heimdall.hearstapps.com/voltron — 200 — 95 B — 107 ms — h2https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js?cb=31097945securepubads.g.doubleclick.net/page... https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js?cb=31097945 — 200 — 187.7 KiB — 72 ms — h3https://securepubads.g.doubleclick.net/pagead/managed/dict/m202604210101/gptsecurepubads.g.doubleclick.net/page... https://securepubads.g.doubleclick.net/pagead/managed/dict/m202604210101/gpt — 200 — 23.0 KiB — 38 ms — h3https://www.runnersworld.com/_assets/design-tokens/runnersworld/static/images/favicon.7c41e8e.icowww.runnersworld.com/_assets/design... https://www.runnersworld.com/_assets/design-tokens/runnersworld/static/images/favicon.7c41e8e.ico — 200 — 12.4 KiB — 2 ms — h3https://www.google.com/recaptcha/enterprise.js?render=explicitwww.google.com/recaptcha/enterprise... https://www.google.com/recaptcha/enterprise.js?render=explicit — 200 — 1.0 KiB — 60 ms — h3https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/media/tag-manager.script.96237b8b.jswww.runnersworld.com/_assets/fre/sc... https://www.runnersworld.com/_assets/fre/scopes/hdm/_next/static/media/tag-manager.script.96237b8b.js — 200 — 1022 B — 3 ms — h3https://nexus.ensighten.com/hearst/mag/Bootstrap.jsnexus.ensighten.com/hearst/mag/Boot... https://nexus.ensighten.com/hearst/mag/Bootstrap.js — 200 — 19.0 KiB — 56 ms — h3https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.jswww.gstatic.com/recaptcha/releases/... https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js — 200 — 362.4 KiB — 190 ms — h2https://nexus.ensighten.com/hearst/mag/serverComponent.php?namespace=Bootstrapper&staticJsPath=nexus.ensighten.com/hearst/mag/code/&ClientID=109&PageID=https%3A%2F%2Fwww.runnersworld.com%2F%3Fgdpr%3Dtrue%26selfhostedads%3Don%26template%3DHomepage%26brand%3Drunnersworld%26locale%3Den-usnexus.ensighten.com/hearst/mag/serv... https://nexus.ensighten.com/hearst/mag/serverComponent.php?namespace=Bootstrapper&staticJsPath=nexus.ensighten.com/hearst/mag/code/&ClientID=109&PageID=https%3A%2F%2Fwww.runnersworld.com%2F%3Fgdpr%3Dtrue%26selfhostedads%3Don%26template%3DHomepage%26brand%3Drunnersworld%26locale%3Den-us — 200 — 620 B — 55 ms — h3https://nexus.ensighten.com/hearst/mag/code/d093f738bcba5116482bc651285bf168.js?conditionId0=4954687nexus.ensighten.com/hearst/mag/code... https://nexus.ensighten.com/hearst/mag/code/d093f738bcba5116482bc651285bf168.js?conditionId0=4954687 — 200 — 1.8 KiB — 7 ms — h3https://nexus.ensighten.com/hearst/mag/code/87ce5733f4168e44b87288ab036c04c5.js?conditionId0=1224151nexus.ensighten.com/hearst/mag/code... https://nexus.ensighten.com/hearst/mag/code/87ce5733f4168e44b87288ab036c04c5.js?conditionId0=1224151 — 200 — 1.3 KiB — 8 ms — h3https://nexus.ensighten.com/hearst/mag/code/2f971b00a5adab2f667ff4fe2e3f9d3e.js?conditionId0=422740nexus.ensighten.com/hearst/mag/code... https://nexus.ensighten.com/hearst/mag/code/2f971b00a5adab2f667ff4fe2e3f9d3e.js?conditionId0=422740 — 200 — 1.0 KiB — 8 ms — h3https://www.google.com/recaptcha/enterprise/anchor?ar=1&k=6LexjOAqAAAAAJaG2fni4e-iDEDfg9T2h9GxkycG&co=aHR0cHM6Ly93d3cucnVubmVyc3dvcmxkLmNvbTo0NDM.&hl=en&v=gTpTIWhbKpxADzTzkcabhXN4&size=invisible&badge=inline&anchor-ms=20000&execute-ms=30000&cb=b07yo7v47p5dwww.google.com/recaptcha/enterprise... https://www.google.com/recaptcha/enterprise/anchor?ar=1&k=6LexjOAqAAAAAJaG2fni4e-iDEDfg9T2h9GxkycG&co=aHR0cHM6Ly93d3cucnVubmVyc3dvcmxkLmNvbTo0NDM.&hl=en&v=gTpTIWhbKpxADzTzkcabhXN4&size=invisible&badge=inline&anchor-ms=20000&execute-ms=30000&cb=b07yo7v47p5d — 200 — 27.7 KiB — 78 ms — h3https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/styles__ltr.csswww.gstatic.com/recaptcha/releases/... https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/styles__ltr.css — 200 — 42.1 KiB — 97 ms — h2https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.jswww.gstatic.com/recaptcha/releases/... https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js — 200 — 361.9 KiB — 163 ms — h2https://www.google.com/recaptcha/enterprise/webworker.js?hl=en&v=gTpTIWhbKpxADzTzkcabhXN4www.google.com/recaptcha/enterprise... https://www.google.com/recaptcha/enterprise/webworker.js?hl=en&v=gTpTIWhbKpxADzTzkcabhXN4 — 200 — 23 B — 172 ms — h3https://www.gstatic.com/recaptcha/api2/logo_48.pngwww.gstatic.com/recaptcha/api2/logo... https://www.gstatic.com/recaptcha/api2/logo_48.png — 200 — 2.3 KiB — 25 ms — h2https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2fonts.gstatic.com/s/roboto/v48/KFO7... https://fonts.gstatic.com/s/roboto/v48/KFO7CnqEu92Fr1ME7kSn66aGLdTylUAMa3yUBHMdazQ.woff2 — 200 — 33.9 KiB — 86 ms — h3https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.jswww.gstatic.com/recaptcha/releases/... https://www.gstatic.com/recaptcha/releases/gTpTIWhbKpxADzTzkcabhXN4/recaptcha__en.js — 200 — 0 B — 12 ms — h2https://o31459.ingest.sentry.io/api/5169640/envelope/?sentry_version=7&sentry_key=9a71f99de2794775bd280be62d9a8b15&sentry_client=sentry.javascript.browser%2F8.55.0o31459.ingest.sentry.io/api/5169640... https://o31459.ingest.sentry.io/api/5169640/envelope/?sentry_version=7&sentry_key=9a71f99de2794775bd280be62d9a8b15&sentry_client=sentry.javascript.browser%2F8.55.0 — 429 — 499 B — 97 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 5442ms · 756KB · $102/mo
Unattributable
Other
Costly
Execution 911ms
Transfer 0 KB
Monthly Cost $17/mo
www.runnersworld.com
Other
Costly
Execution 811ms
Transfer 14 KB
Monthly Cost $15/mo
www.runnersworld.com
Other
Costly
Execution 804ms
Transfer 15 KB
Monthly Cost $15/mo
www.runnersworld.com
Other
Costly
Execution 714ms
Transfer 117 KB
Monthly Cost $13/mo
www.gstatic.com
Other
Costly
Execution 656ms
Transfer 0 KB
Unused 49%
Monthly Cost $12/mo
www.runnersworld.com
Other
Optional
Execution 185ms
Transfer 5 KB
Monthly Cost $3/mo
securepubads.g.doubleclick.net
Other
Optional
Execution 152ms
Transfer 188 KB
Unused 76%
Monthly Cost $3/mo
www.runnersworld.com
Other
Optional
Execution 146ms
Transfer 108 KB
Unused 79%
Monthly Cost $3/mo
www.runnersworld.com
Other
Optional
Execution 143ms
Transfer 7 KB
Monthly Cost $3/mo
www.runnersworld.com
Other
Optional
Execution 137ms
Transfer 4 KB
Monthly Cost $3/mo
www.runnersworld.com
Other
Optional
Execution 134ms
Transfer 4 KB
Monthly Cost $3/mo
www.runnersworld.com
Other
Optional
Execution 96ms
Transfer 53 KB
Unused 89%
Monthly Cost $2/mo
www.runnersworld.com
Other
Optional
Execution 91ms
Transfer 42 KB
Monthly Cost $2/mo
www.runnersworld.com
Other
Optional
Execution 89ms
Transfer 43 KB
Unused 49%
Monthly Cost $2/mo
www.runnersworld.com
Other
Optional
Execution 78ms
Transfer 58 KB
Unused 83%
Monthly Cost $1/mo
securepubads.g.doubleclick.net
Other
Optional
Execution 71ms
Transfer 34 KB
Monthly Cost $1/mo
nexus.ensighten.com
Other
Optional
Execution 59ms
Transfer 19 KB
Monthly Cost $1/mo
www.runnersworld.com
Other
Optional
Execution 58ms
Transfer 13 KB
Monthly Cost $1/mo
www.runnersworld.com
Other
Optional
Execution 55ms
Transfer 5 KB
Monthly Cost $1/mo
www.runnersworld.com
Other
Optional
Execution 53ms
Transfer 28 KB
Monthly Cost $1/mo

These scripts may cost more than they're worth

  • Unattributable adds 911ms and costs ~$17/month
  • www.runnersworld.com adds 811ms and costs ~$15/month
  • www.runnersworld.com adds 804ms and costs ~$15/month
  • www.runnersworld.com adds 714ms and costs ~$13/month
  • www.gstatic.com adds 656ms and costs ~$12/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

Unattributable takes 911ms 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.runnersworld.com takes 811ms 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.runnersworld.com takes 804ms 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.runnersworld.com takes 714ms 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 656ms 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

76% 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

79% of www.runnersworld.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

89% of www.runnersworld.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

83% of www.runnersworld.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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