Performance
· 28 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
1.88 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
7.99 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
2.87 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.182
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
10.50 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.
28.89 s
Page Load Progression
FPage Weight BudgetAction4.7 MB transferred, 150 requestsFIX
Large JavaScript bundles delay interactivity. Split code by route or defer non-critical scripts.
JavaScript bundle is large — code-split routes and lazy-load off-screen components to defer.
Source: web.dev
Convert images to WebP/AVIF and resize to display dimensions to reduce transfer size.
Image bandwidth is high — modern formats (WebP/AVIF) and resizing typically cut it 50%+.
Source: web.dev
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
DThird-Party ImpactAction81% third-party, 0 ms blockingFIX
FJS Execution CostAction7615ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.planetfitness.mx/gyms/pfx/static/js/main.3fe8e074.js | 1734ms | 1257ms | 450ms | 1st |
| Unattributable | 1049ms | 206ms | 0ms | 1st |
| https://www.planetfitness.mx/ | 743ms | 223ms | 7ms | 1st |
| https://www.googletagmanager.com/gtm.js?id=GTM-T7FHLJW | 586ms | 487ms | 47ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-10819236809&cx=c>m=4e6at0h2 | 466ms | 369ms | 54ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-GXZM5G6K8N&cx=c>m=4e6at0h2 | 448ms | 391ms | 48ms | 3rd |
| https://script.hotjar.com/modules.e85a87e594b0aace33cf.js | 383ms | 301ms | 26ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-NPH7H94TXH&cx=c>m=4e6at0h2 | 344ms | 271ms | 69ms | 3rd |
| https://connect.facebook.net/signals/config/1074697796675001?v=2.9.433&r=stable&domain=www.planetfitness.mx&im=1&hme=4453c87d489b6902031c012cadd2731893cd69feb64fe8a61b339727247a7703&ex_m=118%2C242%2C171%2C27%2C82%2C83%2C162%2C78%2C77%2C11%2C181%2C102%2C20%2C153%2C141%2C46%2C85%2C90%2C149%2C176%2C183%2C8%2C4%2C5%2C7%2C6%2C3%2C103%2C115%2C32%2C17%2C31%2C18%2C33%2C34%2C35%2C37%2C55%2C163%2C87%2C126%2C22%2C24%2C51%2C47%2C49%2C48%2C95%2C104%2C108%2C124%2C160%2C164%2C53%2C125%2C29%2C26%2C133%2C79%2C43%2C166%2C165%2C167%2C157%2C155%2C30%2C42%2C66%2C123%2C178%2C80%2C21%2C128%2C93%2C76%2C23%2C97%2C98%2C130%2C96%2C151%2C150%2C154%2C109%2C177%2C180%2C41%2C56%2C127%2C54%2C161%2C72%2C185%2C110%2C184%2C211%2C263%2C84%2C283%2C282%2C281%2C14%2C25%2C28%2C40%2C62%2C117%2C68%2C10%2C73%2C111%2C112%2C113%2C119%2C144%2C38%2C36%2C146%2C147%2C148%2C143%2C142%2C172%2C86%2C175%2C173%2C174%2C57%2C69%2C67%2C137%2C19%2C179%2C52%2C333%2C334%2C335%2C332%2C349%2C371%2C256%2C238%2C70%2C239%2C237%2C374%2C365%2C59%2C257%2C121%2C145%2C92%2C135%2C61%2C134%2C140%2C139%2C65%2C74%2C168%2C88%2C89%2C129%2C44%2C39%2C60%2C63%2C114%2C182%2C1%2C138%2C16%2C136%2C12%2C2%2C64%2C105%2C15%2C75%2C71%2C132%2C101%2C100%2C187%2C188%2C106%2C107%2C9%2C116%2C186%2C58%2C158%2C99%2C91%2C81%2C131%2C120%2C169%2C50%2C159%2C0%2C94%2C152%2C156%2C170%2C45%2C122%2C13%2C189 | 314ms | 251ms | 62ms | 3rd |
| https://d22xmn10vbouk4.cloudfront.net/5fa72f109fe511eca6d20a33479ee2ef.js | 295ms | 218ms | 13ms | 3rd |
Showing top 10 of 17 scripts
FJS BundlesAction68 scripts, 846 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.planetfitness.mx/gyms/pfx/static/js/main.3fe8e074.js | 468 KB | 219 KB (47%) | ✓ | 1st |
| https://cdn.cookielaw.org/scripttemplates/202609.2.0/otBannerSdk.js | 147 KB | 80 KB (55%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-NPH7H94TXH&cx=c>m=4e6at0h2 | 181 KB | 73 KB (41%) | ✓ | 3rd |
| https://www.planetfitness.mx/_next/static/chunks/7530-f8f33d3cd9d1d840.js | 91 KB | 70 KB (77%) | ✓ | 1st |
| https://www.googletagmanager.com/gtag/js?id=G-GXZM5G6K8N&cx=c>m=4e6at0h2 | 164 KB | 66 KB (40%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=AW-10819236809&cx=c>m=4e6at0h2 | 167 KB | 63 KB (38%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-T7FHLJW | 183 KB | 62 KB (34%) | ✓ | 3rd |
| https://connect.facebook.net/signals/config/1074697796675001?v=2.9.433&r=stable&domain=www.planetfitness.mx&im=1&hme=4453c87d489b6902031c012cadd2731893cd69feb64fe8a61b339727247a7703&ex_m=118%2C242%2C171%2C27%2C82%2C83%2C162%2C78%2C77%2C11%2C181%2C102%2C20%2C153%2C141%2C46%2C85%2C90%2C149%2C176%2C183%2C8%2C4%2C5%2C7%2C6%2C3%2C103%2C115%2C32%2C17%2C31%2C18%2C33%2C34%2C35%2C37%2C55%2C163%2C87%2C126%2C22%2C24%2C51%2C47%2C49%2C48%2C95%2C104%2C108%2C124%2C160%2C164%2C53%2C125%2C29%2C26%2C133%2C79%2C43%2C166%2C165%2C167%2C157%2C155%2C30%2C42%2C66%2C123%2C178%2C80%2C21%2C128%2C93%2C76%2C23%2C97%2C98%2C130%2C96%2C151%2C150%2C154%2C109%2C177%2C180%2C41%2C56%2C127%2C54%2C161%2C72%2C185%2C110%2C184%2C211%2C263%2C84%2C283%2C282%2C281%2C14%2C25%2C28%2C40%2C62%2C117%2C68%2C10%2C73%2C111%2C112%2C113%2C119%2C144%2C38%2C36%2C146%2C147%2C148%2C143%2C142%2C172%2C86%2C175%2C173%2C174%2C57%2C69%2C67%2C137%2C19%2C179%2C52%2C333%2C334%2C335%2C332%2C349%2C371%2C256%2C238%2C70%2C239%2C237%2C374%2C365%2C59%2C257%2C121%2C145%2C92%2C135%2C61%2C134%2C140%2C139%2C65%2C74%2C168%2C88%2C89%2C129%2C44%2C39%2C60%2C63%2C114%2C182%2C1%2C138%2C16%2C136%2C12%2C2%2C64%2C105%2C15%2C75%2C71%2C132%2C101%2C100%2C187%2C188%2C106%2C107%2C9%2C116%2C186%2C58%2C158%2C99%2C91%2C81%2C131%2C120%2C169%2C50%2C159%2C0%2C94%2C152%2C156%2C170%2C45%2C122%2C13%2C189 | 148 KB | 48 KB (33%) | ✓ | 3rd |
| https://connect.facebook.net/en_US/fbevents.js | 112 KB | 40 KB (35%) | ✓ | 3rd |
| https://script.hotjar.com/modules.e85a87e594b0aace33cf.js | 57 KB | 38 KB (67%) | ✓ | 3rd |
Consider code splitting or tree shaking to reduce unused code.
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.
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.
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.
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.
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
FPage Weight InventoryAction150 resources · 4.7 MB · 846 KB savings availableFIX
~846.2 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 150 resources | 4.7 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction32 images, 0 KB saveableREVIEW
Set explicit width and height to prevent CLS.
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.
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.
Image without explicit width/height — browser can't reserve space; CLS jumps when image loads.
Source: web.dev / Core Web Vitals
BHTTP/3 (QUIC)HTTP/3 not advertisedREVIEW
BDocument CompressionDocument response uses gzip; brotli would be ~20% smallerREVIEW
BMain HTML Cache-ControlNo Cache-Control header on main HTML responseREVIEW
BJavaScript Blocking2 JS blocking issue(s) detectedREVIEW
A+Text CompressionAll text resources are compressedPASS
A+Font Loading7 fonts (191 KB)PASS
Web fonts
7
191 KB total
Render-blocking
0
of 7
Dominant font-display
swap
Most common across fonts
Font loading timeline
- 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 ~5 KB and ~10 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+LCP Image PreloadLCP preload audit not availablePASS
A+Server-Timing Observability1 Server-Timing entries advertisedPASS
AServer Response Intelligence2 server-response signal(s) detectedPASS
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+CSS Performance DepthNo CSS performance depth issues detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Asset CompressionNo text asset hosts to measureINFO
Network Waterfall150 requests over 7352msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Google Tag Manager www.googletagmanager.com | Tag Manager | 586ms | 183 KB | 34% | MX$43/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 466ms | 167 KB | 38% | MX$34/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 448ms | 164 KB | 40% | MX$33/mo | Costly |
Hotjar script.hotjar.com | Session Replay | 383ms | 57 KB | 67% | MX$28/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 344ms | 181 KB | 41% | MX$25/mo | Costly |
Facebook Pixel connect.facebook.net | Advertising | 314ms | 148 KB | 33% | MX$23/mo | Costly |
d22xmn10vbouk4.cloudfront.net d22xmn10vbouk4.cloudfront.net | Other | 295ms | 27 KB | — | MX$22/mo | Costly |
OneTrust cdn.cookielaw.org | Consent | 261ms | 147 KB | 55% | MX$19/mo | Essential |
Facebook Pixel connect.facebook.net | Advertising | 226ms | 112 KB | 35% | MX$17/mo | Costly |
s.pinimg.com s.pinimg.com | Other | 146ms | 38 KB | — | MX$11/mo | Optional |
pixel.byspotify.com pixel.byspotify.com | Other | 85ms | 15 KB | — | MX$6/mo | Optional |
These scripts may cost more than they're worth
- Google Tag Manager adds 586ms and costs ~MX$43/month
- Google Tag Manager adds 466ms and costs ~MX$34/month
- Google Tag Manager adds 448ms and costs ~MX$33/month
- Hotjar adds 383ms and costs ~MX$28/month
- Google Tag Manager adds 344ms and costs ~MX$25/month
- Facebook Pixel adds 314ms and costs ~MX$23/month
- d22xmn10vbouk4.cloudfront.net adds 295ms and costs ~MX$22/month
- Facebook Pixel adds 226ms and costs ~MX$17/month
47% of JavaScript execution time comes from third-party scripts.
Third-party scripts (analytics, ads, social, A/B testing) often dominate execution time — every one is a perf-and-privacy tax.
Learn more ▾ ▴
Each third-party script is a black box: you don't control when it loads, what it executes, or how much it grows. They often account for a major share of total blocking time on average sites (HTTP Archive's Web Almanac documents the trend). Audit which ones you actually need, defer the rest, and use facade patterns (lite-youtube, lite-vimeo) for embedded media.
Source: web.dev / HTTP Archive Web Almanac
Google Tag Manager takes 586ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Google Tag Manager takes 466ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Google Tag Manager takes 448ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Hotjar takes 383ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
67% of Hotjar's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Google Tag Manager takes 344ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Facebook Pixel takes 314ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
d22xmn10vbouk4.cloudfront.net takes 295ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
55% of OneTrust's code is unused. The script may be loading features you don't use.
Bundle has high unused-code ratio — tree-shaking and route-splitting recover the wasted bytes.
Source: web.dev
Facebook Pixel takes 226ms of CPU time. Consider loading it asynchronously or replacing it with a lighter alternative.
This script has high main-thread execution time — optimize hot paths or defer.
Source: web.dev
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
Chrome User Experience (CrUX)
Real-user metrics from the Chrome UX Report (2026-10-04 — 2026-10-31)
LCP (p75)
1581 ms
91% good
INP (p75)
129 ms
92% good
CLS (p75)
0.080
75% good
FCP (p75)
1424 ms
TTFB (p75)
883 ms
Image Optimization1 images, 6 KB total, 0 KB wastedINFO
Image Optimization Audit
Total Images
1
Total Size
6 KB