Performance
· 17 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.
1.17 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
7.95 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
288 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.002
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
3.30 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.
9.67 s
Page Load Progression
FJS Execution CostAction4755ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://yarnpkg.com/assets/js/1df93b7f.5320f051.js | 3414ms | 340ms | 2ms | 1st |
| https://yarnpkg.com/assets/js/main.cb42a74a.js | 650ms | 482ms | 152ms | 1st |
| Unattributable | 238ms | 7ms | 0ms | 3rd |
| https://yarnpkg.com/assets/js/2201.4e6213c6.js | 173ms | 30ms | 140ms | 1st |
| https://yarnpkg.com/ | 163ms | 13ms | 2ms | 1st |
| https://www.datadoghq-browser-agent.com/eu1/v4/datadog-rum.js | 117ms | 101ms | 13ms | 3rd |
DJS BundlesAction14 scripts, 286 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://yarnpkg.com/assets/js/2201.4e6213c6.js | 223 KB | 136 KB (61%) | ✗ | 1st |
| https://yarnpkg.com/assets/js/main.cb42a74a.js | 310 KB | 121 KB (39%) | ✗ | 1st |
| https://www.datadoghq-browser-agent.com/eu1/v4/datadog-rum.js | 50 KB | 30 KB (60%) | ✓ | 3rd |
| https://yarnpkg.com/assets/js/a7456010.ff441a57.js | 0 KB | — | ✓ | 1st |
| https://yarnpkg.com/assets/js/runtime~main.e7954a67.js | 7 KB | — | ✗ | 1st |
| https://yarnpkg.com/assets/js/1df93b7f.5320f051.js | 4 KB | — | ✓ | 1st |
| https://yarnpkg.com/js/custom.js | 1 KB | — | ✓ | 1st |
| https://yarnpkg.com/assets/js/1df93b7f.5320f051.js | 0 KB | — | ✓ | 1st |
| https://yarnpkg.com/assets/js/a7456010.ff441a57.js | 0 KB | — | ✓ | 1st |
| https://yarnpkg.com/assets/js/5e95c892.c30b0d4b.js | 1 KB | — | ✓ | 1st |
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
CPage Weight BudgetAction1.6 MB transferred, 32 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
BImage Optimization12 images, 0 KB saveableREVIEW
CPage Weight InventoryAction32 resources · 1.6 MB · 286 KB savings availableREVIEW
~286.4 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 32 resources | 1.6 MiB | ||||||
BHTTP Cachingpublic,max-age=0,must-revalidateREVIEW
public,max-age=0,must-revalidate
| Directive | Value | Meaning |
|---|---|---|
| public | — | Any cache may store this response |
| max-age | 0 | Cache for 0 seconds |
| must-revalidate | — | Must recheck with server after expiry |
A+Third-Party Impact3% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading1 fonts (44 KB)PASS
Web fonts
1
44 KB total
Render-blocking
0
of 1
Dominant font-display
swap
Most common across fonts
Font loading timeline
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)
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints7 hints, 0 missing preconnectsPASS
Current Resource Hints
7 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Network Waterfall32 requests over 930msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 238ms | 0 KB | — | $3/mo | Costly |
www.datadoghq-browser-agent.com www.datadoghq-browser-agent.com | Other | 117ms | 50 KB | 60% | $2/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 238ms and costs ~$3/month
Unattributable takes 238ms 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
60% of www.datadoghq-browser-agent.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