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.
5.18 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
10.89 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.42 s
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.759
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
5.83 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.
31.91 s
Page Load Progression
FPage Weight BudgetAction8.6 MB transferred, 164 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
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
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 CostAction8555ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 2349ms | 122ms | 0ms | 3rd |
| https://www.coe.int/en/web/portal/home | 1726ms | 153ms | 32ms | 3rd |
| https://www.coe.int/o/frontend-js-svg4everybody-web/index.js | 1093ms | 266ms | 10ms | 3rd |
| https://static.coe.int/libs/common/coe-2014-theme/templates/sliders.js | 947ms | 296ms | 1ms | 3rd |
| https://www.coe.int/combo?browserId=chrome&minifierType=js&languageId=en_GB&t=1775804588649&/o/frontend-js-aui-web/aui/aui/aui.js&/o/frontend-js-aui-web/liferay/modules.js&/o/frontend-js-aui-web/liferay/aui_sandbox.js&/o/frontend-js-aui-web/aui/attribute-base/attribute-base.js&/o/frontend-js-aui-web/aui/attribute-complex/attribute-complex.js&/o/frontend-js-aui-web/aui/attribute-core/attribute-core.js&/o/frontend-js-aui-web/aui/attribute-observable/attribute-observable.js&/o/frontend-js-aui-web/aui/attribute-extras/attribute-extras.js&/o/frontend-js-aui-web/aui/event-custom-base/event-custom-base.js&/o/frontend-js-aui-web/aui/event-custom-complex/event-custom-complex.js&/o/frontend-js-aui-web/aui/oop/oop.js&/o/frontend-js-aui-web/aui/aui-base-lang/aui-base-lang.js&/o/frontend-js-aui-web/liferay/dependency.js&/o/frontend-js-aui-web/liferay/util.js&/o/frontend-js-web/loader/config.js&/o/frontend-js-web/loader/loader.js&/o/frontend-js-web/liferay/dom_task_runner.js&/o/frontend-js-web/liferay/events.js&/o/frontend-js-web/liferay/lazy_load.js&/o/frontend-js-web/liferay/liferay.js&/o/frontend-js-web/liferay/global.bundle.js&/o/frontend-js-web/liferay/portlet.js&/o/frontend-js-web/liferay/workflow.js | 686ms | 505ms | 65ms | 3rd |
| https://www.coe.int/cdn-cgi/challenge-platform/scripts/jsd/main.js | 607ms | 546ms | 4ms | 3rd |
| https://coe.containers.piwik.pro/7a8e4f13-52de-496c-9239-96129f02cf08.js | 448ms | 283ms | 47ms | 3rd |
| https://www.coe.int/combo?browserId=chrome&minifierType=js&languageId=en_GB&t=1775804592497&/o/frontend-js-jquery-web/jquery/jquery.min.js&/o/frontend-js-jquery-web/jquery/init.js&/o/frontend-js-jquery-web/jquery/ajax.js&/o/frontend-js-jquery-web/jquery/bootstrap.bundle.min.js&/o/frontend-js-jquery-web/jquery/collapsible_search.js&/o/frontend-js-jquery-web/jquery/fm.js&/o/frontend-js-jquery-web/jquery/form.js&/o/frontend-js-jquery-web/jquery/popper.min.js&/o/frontend-js-jquery-web/jquery/side_navigation.js | 355ms | 221ms | 41ms | 3rd |
| https://www.coe.int/combo/?browserId=chrome&minifierType=&languageId=en_GB&t=1775804588649&/o/js/resolved-module/@frontend-taglib-clay$clayui/modal@3.89.0/lib/Body.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/modal@3.89.0/lib/Context.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/modal@3.89.0/lib/Footer.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/modal@3.89.0/lib/Header.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/modal@3.89.0/lib/Hook.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/modal@3.89.0/lib/types.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/modal@3.89.0/lib/Modal.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/modal@3.89.0/lib/useModal.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/modal@3.89.0/lib/Provider.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/modal@3.89.0/lib/index.js&/o/js/resolved-module/frontend-js-react-web$classnames@2.2.6/index.js&/o/js/resolved-module/frontend-js-react-web$prop-types@15.7.2/lib/ReactPropTypesSecret.js&/o/js/resolved-module/frontend-js-react-web$prop-types@15.7.2/factoryWithThrowingShims.js&/o/js/resolved-module/frontend-js-react-web$prop-types@15.7.2/index.js&/o/js/resolved-module/frontend-js-web@4.0.60/liferay/modal/Modal.scss.js&/o/js/resolved-module/frontend-js-web@4.0.60/liferay/util/navigate.es.js&/o/js/resolved-module/frontend-js-web@4.0.60/liferay/modal/Modal.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/form@3.89.0/lib/Checkbox.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/form@3.89.0/lib/SelectBox.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/form@3.89.0/lib/DualListBox.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/form@3.89.0/lib/Form.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/form@3.89.0/lib/Input.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/form@3.89.0/lib/Radio.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/form@3.89.0/lib/RadioGroup.js | 109ms | 91ms | 14ms | 3rd |
| https://www.coe.int/combo/?browserId=chrome&minifierType=&languageId=en_GB&t=1775804588649&/o/js/resolved-module/frontend-js-react-web@4.0.23/js/hooks/useEventListener.es.js&/o/js/resolved-module/frontend-js-react-web@4.0.23/js/hooks/useIsMounted.es.js&/o/js/resolved-module/frontend-js-react-web@4.0.23/js/hooks/useInterval.es.js&/o/js/resolved-module/frontend-js-react-web@4.0.23/js/hooks/usePrevious.es.js&/o/js/resolved-module/frontend-js-react-web@4.0.23/js/hooks/useStateSafe.es.js&/o/js/resolved-module/frontend-js-react-web@4.0.23/js/hooks/useThunk.es.js&/o/js/resolved-module/frontend-js-react-web@4.0.23/js/hooks/useTimeout.es.js&/o/js/resolved-module/frontend-js-react-web@4.0.23/js/index.es.js&/o/js/resolved-module/frontend-js-web@4.0.60/liferay/toast/commands/OpenToast.es.js&/o/js/resolved-module/frontend-js-web@4.0.60/bridge/frontend-js-web/liferay/toast/commands/OpenToast.es.js | 86ms | 83ms | 2ms | 3rd |
Showing top 10 of 12 scripts
DPage Weight InventoryAction164 resources · 8.6 MB · 139 KB savings availableFIX
~139.5 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 164 resources | 8.6 MiB | ||||||
FHTTP CachingActionNo cache headersFIX
No Cache-Control header
Adding a Cache-Control header can significantly improve repeat-visit performance.
CImage OptimizationAction89 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.
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
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
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
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
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
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
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
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
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
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
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
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
BJS Bundles36 scripts, 139 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.coe.int/combo?browserId=chrome&minifierType=js&languageId=en_GB&t=1775804592497&/o/frontend-js-jquery-web/jquery/jquery.min.js&/o/frontend-js-jquery-web/jquery/init.js&/o/frontend-js-jquery-web/jquery/ajax.js&/o/frontend-js-jquery-web/jquery/bootstrap.bundle.min.js&/o/frontend-js-jquery-web/jquery/collapsible_search.js&/o/frontend-js-jquery-web/jquery/fm.js&/o/frontend-js-jquery-web/jquery/form.js&/o/frontend-js-jquery-web/jquery/popper.min.js&/o/frontend-js-jquery-web/jquery/side_navigation.js | 68 KB | 44 KB (64%) | ✓ | 3rd |
| https://www.coe.int/combo?browserId=chrome&minifierType=js&languageId=en_GB&t=1775804588649&/o/frontend-js-aui-web/aui/aui/aui.js&/o/frontend-js-aui-web/liferay/modules.js&/o/frontend-js-aui-web/liferay/aui_sandbox.js&/o/frontend-js-aui-web/aui/attribute-base/attribute-base.js&/o/frontend-js-aui-web/aui/attribute-complex/attribute-complex.js&/o/frontend-js-aui-web/aui/attribute-core/attribute-core.js&/o/frontend-js-aui-web/aui/attribute-observable/attribute-observable.js&/o/frontend-js-aui-web/aui/attribute-extras/attribute-extras.js&/o/frontend-js-aui-web/aui/event-custom-base/event-custom-base.js&/o/frontend-js-aui-web/aui/event-custom-complex/event-custom-complex.js&/o/frontend-js-aui-web/aui/oop/oop.js&/o/frontend-js-aui-web/aui/aui-base-lang/aui-base-lang.js&/o/frontend-js-aui-web/liferay/dependency.js&/o/frontend-js-aui-web/liferay/util.js&/o/frontend-js-web/loader/config.js&/o/frontend-js-web/loader/loader.js&/o/frontend-js-web/liferay/dom_task_runner.js&/o/frontend-js-web/liferay/events.js&/o/frontend-js-web/liferay/lazy_load.js&/o/frontend-js-web/liferay/liferay.js&/o/frontend-js-web/liferay/global.bundle.js&/o/frontend-js-web/liferay/portlet.js&/o/frontend-js-web/liferay/workflow.js | 102 KB | 43 KB (42%) | ✓ | 3rd |
| https://coe.containers.piwik.pro/7a8e4f13-52de-496c-9239-96129f02cf08.js | 73 KB | 29 KB (40%) | ✓ | 3rd |
| https://www.coe.int/combo/?browserId=chrome&minifierType=&languageId=en_GB&t=1775804588649&/o/js/resolved-module/frontend-js-metal-web@4.0.16/bridge/metal-dom/src/all/dom.js&/o/js/resolved-module/frontend-taglib-clay$classnames@2.2.6/index.js&/o/js/resolved-module/frontend-js-react-web$object-assign@4.1.1/index.js&/o/js/resolved-module/frontend-js-react-web$react@16.12.0/cjs/react.production.min.js&/o/js/resolved-module/frontend-js-react-web$react@16.12.0/index.js&/o/js/resolved-module/frontend-taglib-clay$warning@4.0.3/warning.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/icon@3.56.0/lib/index.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/layout@3.65.1/lib/Col.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/layout@3.65.1/lib/Container.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/layout@3.65.1/lib/ContainerFluid.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/layout@3.65.1/lib/Content.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/layout@3.65.1/lib/Row.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/layout@3.65.1/lib/Sheet.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/layout@3.65.1/lib/index.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/alert@3.5.0/lib/Footer.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/alert@3.5.0/lib/ToastContainer.js&/o/js/resolved-module/@frontend-taglib-clay$clayui/alert@3.5.0/lib/index.js&/o/js/resolved-module/frontend-js-node-shims$process@0.11.10/browser.js&/o/js/resolved-module/frontend-js-node-shims$process@0.11.10/index.js&/o/js/resolved-module/frontend-js-react-web$scheduler@0.18.0/cjs/scheduler.production.min.js&/o/js/resolved-module/frontend-js-react-web$scheduler@0.18.0/index.js&/o/js/resolved-module/frontend-js-react-web$react-dom@16.12.0/cjs/react-dom.production.min.js&/o/js/resolved-module/frontend-js-react-web$react-dom@16.12.0/index.js&/o/js/resolved-module/frontend-js-react-web@4.0.23/js/render.es.js | 47 KB | 24 KB (52%) | ✓ | 3rd |
| https://static.coe.int/libs/common/coe-2014-theme/templates/sliders.js | 1 KB | — | ✓ | 3rd |
| https://www.coe.int/combo/?browserId=chrome&minifierType=&languageId=en_GB&t=1775804588649&/o/js/resolved-module/frontend-js-react-web@4.0.23/js/hooks/useEventListener.es.js&/o/js/resolved-module/frontend-js-react-web@4.0.23/js/hooks/useIsMounted.es.js&/o/js/resolved-module/frontend-js-react-web@4.0.23/js/hooks/useInterval.es.js&/o/js/resolved-module/frontend-js-react-web@4.0.23/js/hooks/usePrevious.es.js&/o/js/resolved-module/frontend-js-react-web@4.0.23/js/hooks/useStateSafe.es.js&/o/js/resolved-module/frontend-js-react-web@4.0.23/js/hooks/useThunk.es.js&/o/js/resolved-module/frontend-js-react-web@4.0.23/js/hooks/useTimeout.es.js&/o/js/resolved-module/frontend-js-react-web@4.0.23/js/index.es.js&/o/js/resolved-module/frontend-js-web@4.0.60/liferay/toast/commands/OpenToast.es.js&/o/js/resolved-module/frontend-js-web@4.0.60/bridge/frontend-js-web/liferay/toast/commands/OpenToast.es.js | 2 KB | — | ✓ | 3rd |
| https://static.coe.int/libs/jquery-plugins/jquery.flexslider.min.2.7.2.js | 7 KB | — | ✓ | 3rd |
| https://static.coe.int/libs/common/coe-2014-theme/auto-height.js | 1 KB | — | ✓ | 3rd |
| https://static.coe.int/libs/common/coe-2014-theme/auto-font-size.js | 1 KB | — | ✓ | 3rd |
| https://www.coe.int/o/frontend-js-svg4everybody-web/index.js | 2 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
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
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 (800 KB)PASS
Web fonts
7
800 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
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- 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
- 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
- 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
- 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
- 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 ~621 KB and ~1242 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
Network Waterfall164 requests over 4420msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 2349ms | 0 KB | — | €26/mo | Costly |
www.coe.int www.coe.int | Other | 1726ms | 151 KB | — | €19/mo | Costly |
www.coe.int www.coe.int | Other | 1093ms | 2 KB | — | €12/mo | Costly |
static.coe.int static.coe.int | Other | 947ms | 1 KB | — | €10/mo | Costly |
www.coe.int www.coe.int | Other | 686ms | 102 KB | 42% | €7/mo | Costly |
www.coe.int www.coe.int | Other | 607ms | 0 KB | — | €7/mo | Costly |
coe.containers.piwik.pro coe.containers.piwik.pro | Other | 448ms | 73 KB | 40% | €5/mo | Costly |
www.coe.int www.coe.int | Other | 355ms | 68 KB | 64% | €4/mo | Costly |
www.coe.int www.coe.int | Other | 109ms | 14 KB | — | €1/mo | Optional |
www.coe.int www.coe.int | Other | 86ms | 2 KB | — | €1/mo | Optional |
www.coe.int www.coe.int | Other | 85ms | 13 KB | — | €1/mo | Optional |
coe.piwik.pro coe.piwik.pro | Other | 65ms | 26 KB | — | €1/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 2349ms and costs ~€26/month
- www.coe.int adds 1726ms and costs ~€19/month
- www.coe.int adds 1093ms and costs ~€12/month
- static.coe.int adds 947ms and costs ~€10/month
- www.coe.int adds 686ms and costs ~€7/month
- www.coe.int adds 607ms and costs ~€7/month
- coe.containers.piwik.pro adds 448ms and costs ~€5/month
- www.coe.int adds 355ms 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
Unattributable takes 2349ms 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.coe.int takes 1726ms 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.coe.int takes 1093ms 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
static.coe.int takes 947ms 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.coe.int takes 686ms 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.coe.int takes 607ms 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
coe.containers.piwik.pro takes 448ms 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.coe.int 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
64% of www.coe.int'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