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.
4.03 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
7.98 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
150 ms
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.
6.97 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.
8.19 s
Page Load Progression
BPage Weight Budget1.4 MB transferred, 56 requestsREVIEW
BImage Optimization26 images, 0 KB saveableREVIEW
CJS Execution CostAction1321ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://rsf.org/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader.min.js | 438ms | 294ms | 1ms | 1st |
| Unattributable | 256ms | 6ms | 0ms | 3rd |
| https://rsf.org/en | 218ms | 3ms | 0ms | 1st |
| https://cdn.jsdelivr.net/npm/chart.js@3.7.1 | 212ms | 32ms | 17ms | 3rd |
| https://rsf.org/libraries/tarteaucitron/tarteaucitron.js?v=1.4 | 137ms | 88ms | 11ms | 1st |
| https://rsf.org/sites/default/files/js/js_Q8hR4-4XVzlJMxcyTvFTXSmfFqLE7IBzPksRejZaHZ4.js?scope=footer&delta=0&language=en&theme=rsf&include=eJwrKk7TT8_JT0rM0S0uqczJzEvXKSpOi0-tSEwuyczP009KLMrPTS0pSo1PzkgsKikGy5YkJusDMQDRrxed | 61ms | 37ms | 20ms | 1st |
BJS Bundles11 scripts, 101 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://cdn.jsdelivr.net/npm/chart.js@3.7.1 | 66 KB | 42 KB (64%) | ✓ | 3rd |
| https://rsf.org/sites/default/files/js/js_Q8hR4-4XVzlJMxcyTvFTXSmfFqLE7IBzPksRejZaHZ4.js?scope=footer&delta=0&language=en&theme=rsf&include=eJwrKk7TT8_JT0rM0S0uqczJzEvXKSpOi0-tSEwuyczP009KLMrPTS0pSo1PzkgsKikGy5YkJusDMQDRrxed | 63 KB | 34 KB (55%) | ✓ | 1st |
| https://rsf.org/libraries/tarteaucitron/tarteaucitron.services.js?v=20230203 | 35 KB | 25 KB (72%) | ✗ | 1st |
| https://rsf.org/cdn-cgi/scripts/7d0fa10a/cloudflare-static/rocket-loader.min.js | 4 KB | — | ✓ | 1st |
| https://static.cloudflareinsights.com/beacon.min.js | 11 KB | — | ✓ | 3rd |
| https://rsf.org/sites/default/files/js/js_wSowJaR7kDOqIhosxLwjQDwh4MX3o5S_PIEQDxyDRgc.js?scope=footer&delta=6&language=en&theme=rsf&include=eJwrKk7TT8_JT0rM0S0uqczJzEvXKSpOi0-tSEwuyczP009KLMrPTS0pSo1PzkgsKikGy5YkJusDMQDRrxed | 1 KB | — | ✓ | 1st |
| https://rsf.org/modules/custom/rsf_tac/js/tarteaucitron.services.js?v=1.4 | 2 KB | — | ✓ | 1st |
| https://rsf.org/libraries/tarteaucitron/tarteaucitron.js?v=1.4 | 20 KB | — | ✗ | 1st |
| https://rsf.org/sites/default/files/js/js_bPXo3Cc6Lnq-h2gLmwQciPwLnHAkVzQRa-8suTJSeCU.js?scope=footer&delta=3&language=en&theme=rsf&include=eJwrKk7TT8_JT0rM0S0uqczJzEvXKSpOi0-tSEwuyczP009KLMrPTS0pSo1PzkgsKikGy5YkJusDMQDRrxed | 2 KB | — | ✓ | 1st |
| https://rsf.org/themes/custom/rsf/assets/scripts/app.js?tbfu2i | 8 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
BPage Weight Inventory56 resources · 1.4 MB · 101 KB savings availableREVIEW
~101.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 56 resources | 1.4 MiB | ||||||
BHTTP Cachingmust-revalidate, no-cache, privateREVIEW
must-revalidate, no-cache, private
| Directive | Value | Meaning |
|---|---|---|
| must-revalidate | — | Must recheck with server after expiry |
| no-cache | — | Cache but always revalidate first |
| private | — | Only browser cache, not CDN/proxy |
A+Third-Party Impact9% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading5 fonts (92 KB)PASS
Web fonts
5
92 KB total
Render-blocking
0
of 5
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
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 Waterfall56 requests over 1540msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 256ms | 0 KB | — | €3/mo | Costly |
jsDelivr cdn.jsdelivr.net | CDN | 212ms | 66 KB | 64% | €2/mo | Costly |
These scripts may cost more than they're worth
- Unattributable adds 256ms and costs ~€3/month
- jsDelivr adds 212ms and costs ~€2/month
Unattributable takes 256ms 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
jsDelivr takes 212ms 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
64% of jsDelivr'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