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.
884 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.58 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
34 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.001
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
1.56 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.
4.43 s
Page Load Progression
375 ms 750 ms
1.1 s
1.5 s
1.9 s
2.2 s 2.6 s 3.0 sFPage Weight BudgetAction7.0 MB transferred, 78 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
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
Remove unused CSS rules with tools like PurgeCSS to reduce stylesheet size.
CSS bundle is large — purge unused styles (PurgeCSS, Tailwind JIT) to reduce CSS payload.
Source: web.dev
FJS BundlesAction10 scripts, 826 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://moodle.org/lib/requirejs.php/1774890407/core/first.js | 763 KB | 691 KB (91%) | ✓ | 1st |
| https://cdn.cookielaw.org/scripttemplates/202406.1.0/otBannerSdk.js | 110 KB | 58 KB (53%) | ✓ | 3rd |
| https://moodle.org/theme/yui_combo.php?rollup/3.18.1/yui-moodlesimple-min.js | 82 KB | 43 KB (53%) | ✓ | 1st |
| https://moodle.org/lib/javascript.php/1774890407/lib/polyfills/polyfill.js | 59 KB | 33 KB (56%) | ✓ | 1st |
| https://cdn.cookielaw.org/consent/41472476-2396-4599-82d6-b8c87f439f8e/OtAutoBlock.js | 3 KB | — | ✓ | 3rd |
| https://cdn.cookielaw.org/consent/41472476-2396-4599-82d6-b8c87f439f8e/otSDKStub.js | 7 KB | — | ✓ | 3rd |
| https://moodle.org/lib/javascript.php/1774890407/lib/javascript-static.js | 7 KB | — | ✓ | 1st |
| https://moodle.org/lib/javascript.php/1774890407/lib/requirejs/require.min.js | 7 KB | — | ✓ | 1st |
| https://moodle.org/lib/javascript.php/1774890407/lib/requirejs/jquery-private.js | 0 KB | — | ✓ | 1st |
| https://moodle.org/lib/javascript.php/1774890407/lib/jquery/jquery-3.7.1.min.js | 30 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
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
DPage Weight InventoryAction78 resources · 7.0 MB · 826 KB savings availableFIX
~825.9 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 78 resources | 7.0 MiB | ||||||
DHTTP CachingActionno-store (uncacheable)FIX
no-store, no-cache, must-revalidate, no-transform
| Directive | Value | Meaning |
|---|---|---|
| no-store | — | Never cache this response |
| no-cache | — | Cache but always revalidate first |
| must-revalidate | — | Must recheck with server after expiry |
| no-transform | — |
BImage Optimization47 images, 0 KB saveableREVIEW
BJS Execution Cost820ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 255ms | 24ms | 0ms | 3rd |
| https://moodle.org/ | 180ms | 4ms | 3ms | 1st |
| https://moodle.org/lib/javascript.php/1774890407/lib/requirejs/require.min.js | 116ms | 93ms | 1ms | 1st |
| https://moodle.org/lib/requirejs.php/1774890407/core/first.js | 112ms | 8ms | 104ms | 1st |
| https://cdn.cookielaw.org/scripttemplates/202406.1.0/otBannerSdk.js | 90ms | 56ms | 21ms | 3rd |
| https://moodle.org/theme/yui_combo.php?rollup/3.18.1/yui-moodlesimple-min.js | 66ms | 48ms | 8ms | 1st |
A+Third-Party Impact10% third-party, 0 ms blockingPASS
A+Text CompressionAll text resources are compressedPASS
A+Font Loading4 fonts (231 KB)PASS
Web fonts
4
231 KB total
Render-blocking
0
of 4
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
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
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 ~91 KB and ~182 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 Waterfall78 requests over 2339msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 255ms | 0 KB | — | €3/mo | Costly |
OneTrust cdn.cookielaw.org | Consent | 90ms | 110 KB | 53% | €1/mo | Essential |
These scripts may cost more than they're worth
- Unattributable adds 255ms and costs ~€3/month
42% 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
Unattributable takes 255ms 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
53% 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