Performance
· 15 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.
640 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.83 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.09 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.000
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.10 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.
6.00 s
Page Load Progression
FPage Weight BudgetAction7.8 MB transferred, 230 requestsFIX
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
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
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 ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction4205ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.meetup.com/_next/static/chunks/framework-5d63545f2ef3c1f6.js | 1496ms | 1413ms | 7ms | 3rd |
| https://www.meetup.com/_next/static/chunks/pages/_app-f8c38d8f25588fbd.js | 803ms | 527ms | 90ms | 3rd |
| Unattributable | 505ms | 85ms | 0ms | 3rd |
| https://www.meetup.com/ | 469ms | 34ms | 1ms | 3rd |
| https://www.googletagmanager.com/gtm.js?id=GTM-T2LNGD | 260ms | 230ms | 19ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-NP82XMKW0P&cx=c>m=4e64h1 | 111ms | 93ms | 17ms | 3rd |
| https://js.stripe.com/v3 | 88ms | 58ms | 30ms | 3rd |
| https://rkt.meetup.com/wsdk/plugins/widget/modern/index.bc13226619f0851fb148.js | 86ms | 47ms | 39ms | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202602.1.0/otBannerSdk.js | 78ms | 52ms | 22ms | 3rd |
| https://rkt.meetup.com/wsdk/plugins/dcui/index.a24659f4b08fce15a6ca.js | 72ms | 53ms | 17ms | 3rd |
Showing top 10 of 14 scripts
FJS BundlesAction87 scripts, 1.9 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.meetup.com/_next/static/chunks/pages/_app-f8c38d8f25588fbd.js | 613 KB | 265 KB (43%) | ✓ | 3rd |
| https://rkt.meetup.com/wsdk/plugins/widget/modern/index.bc13226619f0851fb148.js | 253 KB | 204 KB (81%) | ✓ | 3rd |
| https://js.stripe.com/v3 | 220 KB | 160 KB (73%) | ✓ | 3rd |
| https://rkt.meetup.com/wsdk/plugins/dcui/index.a24659f4b08fce15a6ca.js | 145 KB | 112 KB (77%) | ✓ | 3rd |
| https://www.meetup.com/_next/static/chunks/31002-f96bd342c82a5fe6.js | 63 KB | 106 KB (50%) | ✓ | 3rd |
| https://www.meetup.com/_next/static/chunks/31002-f96bd342c82a5fe6.js | 0 KB | 106 KB (50%) | ✓ | 3rd |
| https://cdn.cookielaw.org/scripttemplates/202602.1.0/otBannerSdk.js | 129 KB | 73 KB (56%) | ✓ | 3rd |
| https://www.meetup.com/_next/static/chunks/37015-b1bc0cf6d62d627a.js | 0 KB | 72 KB (81%) | ✓ | 3rd |
| https://www.meetup.com/_next/static/chunks/37015-b1bc0cf6d62d627a.js | 21 KB | 72 KB (81%) | ✓ | 3rd |
| https://accounts.google.com/gsi/client | 96 KB | 69 KB (72%) | ✓ | 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 InventoryAction230 resources · 7.8 MB · 1.9 MB savings availableFIX
~1.9 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 230 resources | 7.8 MiB | ||||||
DHTTP CachingActionno-store (uncacheable)FIX
private, no-cache, no-store, max-age=0, must-revalidate
| Directive | Value | Meaning |
|---|---|---|
| private | — | Only browser cache, not CDN/proxy |
| no-cache | — | Cache but always revalidate first |
| no-store | — | Never cache this response |
| max-age | 0 | Cache for 0 seconds |
| must-revalidate | — | Must recheck with server after expiry |
BImage Optimization67 images, 0 KB saveableREVIEW
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
A+Text CompressionAll text resources are compressedPASS
A+Font Loading7 fonts (119 KB)PASS
Web fonts
7
119 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 ~2 KB and ~4 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall230 requests over 8473msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.meetup.com www.meetup.com | Other | 1496ms | 45 KB | — | $26/mo | Costly |
www.meetup.com www.meetup.com | Other | 803ms | 613 KB | 43% | $14/mo | Costly |
Unattributable Unattributable | Other | 505ms | 0 KB | — | $9/mo | Costly |
www.meetup.com www.meetup.com | Other | 469ms | 62 KB | — | $8/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 260ms | 164 KB | 32% | $4/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 111ms | 164 KB | 37% | $2/mo | Optional |
Stripe js.stripe.com | Payment | 88ms | 220 KB | 73% | $2/mo | Essential |
rkt.meetup.com rkt.meetup.com | Other | 86ms | 253 KB | 81% | $1/mo | Optional |
OneTrust cdn.cookielaw.org | Consent | 78ms | 129 KB | 56% | $1/mo | Essential |
rkt.meetup.com rkt.meetup.com | Other | 72ms | 145 KB | 77% | $1/mo | Optional |
rkt.meetup.com rkt.meetup.com | Other | 63ms | 57 KB | — | $1/mo | Optional |
www.meetup.com www.meetup.com | Other | 63ms | 37 KB | — | $1/mo | Optional |
Google Analytics www.google-analytics.com | Analytics | 58ms | 21 KB | — | $1/mo | Optional |
Facebook Pixel connect.facebook.net | Advertising | 53ms | 45 KB | — | $1/mo | Optional |
These scripts may cost more than they're worth
- www.meetup.com adds 1496ms and costs ~$26/month
- www.meetup.com adds 803ms and costs ~$14/month
- Unattributable adds 505ms and costs ~$9/month
- www.meetup.com adds 469ms and costs ~$8/month
- Google Tag Manager adds 260ms and costs ~$4/month
100% of JavaScript execution time is spent on third-party scripts. Consider auditing which scripts are essential.
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.meetup.com takes 1496ms 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
www.meetup.com takes 803ms 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
Unattributable takes 505ms 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
www.meetup.com takes 469ms 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 260ms 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
73% of Stripe'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
81% of rkt.meetup.com'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
56% 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
77% of rkt.meetup.com'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