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.
754 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
2.34 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
39 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.004
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.72 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.
2.36 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
FJS Execution CostAction4720ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://wellfound.com/landing-page-assets/64626a4a74818ca87606a29e/js/wellfound-v2.schunk.3b017b4dd695cb08.js | 2322ms | 641ms | 15ms | 3rd |
| https://wellfound.com/landing-page-assets/ajax/libs/parallax/3.1.0/parallax.min.js | 1097ms | 504ms | 1ms | 3rd |
| Unattributable | 355ms | 7ms | 0ms | 3rd |
| https://wellfound.com/ | 266ms | 83ms | 2ms | 3rd |
| https://wellfound.com/landing-page-assets/js/jquery-3.5.1.min.dc5e7f18c8.js | 156ms | 116ms | 2ms | 3rd |
| https://wellfound.com/cdn-cgi/challenge-platform/scripts/jsd/main.js | 147ms | 138ms | 2ms | 3rd |
| https://consent.trustarc.com/v2/notice/gsyiod?pcookie | 141ms | 61ms | 3ms | 3rd |
| https://wellfound.com/landing-page-assets/64626a4a74818ca87606a29e/js/wellfound-v2.52bb555a.d9bf73db75aba17a.js | 109ms | 109ms | 0ms | 3rd |
| https://wellfound.com/landing-page-assets/ajax/libs/gsap/3.11.3/gsap.min.js | 77ms | 30ms | 1ms | 3rd |
| https://wellfound.com/landing-page-assets/64626a4a74818ca87606a29e/js/wellfound-v2.schunk.7bcf27380cad5093.js | 50ms | 6ms | 39ms | 3rd |
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
BPage Weight Budget1.1 MB transferred, 63 requestsREVIEW
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
Subset fonts to include only used characters, or switch to system font stacks.
Font payload is large — subset to used glyphs only, or fall back to system fonts (zero load time).
Source: web.dev font loading
CImage OptimizationAction26 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.
Performance issues directly impact user engagement and conversion rates.
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
CJS BundlesAction18 scripts, 174 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://wellfound.com/landing-page-assets/64626a4a74818ca87606a29e/js/wellfound-v2.schunk.7bcf27380cad5093.js | 219 KB | 78 KB (37%) | ✓ | 3rd |
| https://accounts.google.com/gsi/client | 96 KB | 71 KB (75%) | ✓ | 3rd |
| https://wellfound.com/landing-page-assets/64626a4a74818ca87606a29e/js/wellfound-v2.schunk.3b017b4dd695cb08.js | 97 KB | 25 KB (26%) | ✓ | 3rd |
| https://wellfound.com/landing-page-assets/split-type.js | 5 KB | — | ✓ | 3rd |
| https://wellfound.com/landing-page-assets/ajax/libs/gsap/3.11.3/ScrollTrigger.min.js | 17 KB | — | ✓ | 3rd |
| https://wellfound.com/landing-page-assets/npm/slick-carousel@1.8.1/slick/slick.min.js | 11 KB | — | ✓ | 3rd |
| https://wellfound.com/landing-page-assets/ajax/libs/waypoints/4.0.0/jquery.waypoints.min.js | 3 KB | — | ✓ | 3rd |
| https://wellfound.com/landing-page-assets/ajax/libs/parallax/3.1.0/parallax.min.js | 6 KB | — | ✓ | 3rd |
| https://wellfound.com/tracker_consent/consent_manager_script | 2 KB | — | ✓ | 3rd |
| https://wellfound.com/landing-page-assets/ajax/libs/gsap/3.11.3/gsap.min.js | 28 KB | — | ✓ | 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
BPage Weight Inventory63 resources · 1.1 MB · 174 KB savings availableREVIEW
~174.3 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 63 resources | 1.1 MiB | ||||||
A+Text CompressionAll text resources are compressedPASS
A+Font Loading6 fonts (258 KB)PASS
Web fonts
6
258 KB total
Render-blocking
0
of 6
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- Convert to woff2 for ~30% smaller file size
- 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 ~62 KB and ~124 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall63 requests over 1334msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
wellfound.com wellfound.com | Other | 2322ms | 97 KB | 26% | $31/mo | Costly |
wellfound.com wellfound.com | Other | 1097ms | 6 KB | — | $15/mo | Costly |
Unattributable Unattributable | Other | 355ms | 0 KB | — | $5/mo | Costly |
wellfound.com wellfound.com | Other | 266ms | 18 KB | — | $4/mo | Costly |
wellfound.com wellfound.com | Other | 156ms | 31 KB | — | $2/mo | Optional |
wellfound.com wellfound.com | Other | 147ms | 0 KB | — | $2/mo | Optional |
consent.trustarc.com consent.trustarc.com | Other | 141ms | 33 KB | — | $2/mo | Optional |
wellfound.com wellfound.com | Other | 109ms | 2 KB | — | $1/mo | Optional |
wellfound.com wellfound.com | Other | 77ms | 28 KB | — | $1/mo | Optional |
wellfound.com wellfound.com | Other | 50ms | 219 KB | 37% | $1/mo | Optional |
These scripts may cost more than they're worth
- wellfound.com adds 2322ms and costs ~$31/month
- wellfound.com adds 1097ms and costs ~$15/month
- Unattributable adds 355ms and costs ~$5/month
- wellfound.com adds 266ms 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
wellfound.com takes 2322ms 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
wellfound.com takes 1097ms 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 355ms 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
wellfound.com takes 266ms 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