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.
5.05 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
5.10 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
167 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.018
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
5.16 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.
10.15 s
Page Load Progression
DThird-Party ImpactAction100% third-party, 0 ms blockingFIX
DJS BundlesAction24 scripts, 171 KB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://www.googletagmanager.com/gtag/js?id=GT-W62J3VD | 155 KB | 66 KB (42%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=UA-35180637-1&ver=6.9.4 | 116 KB | 65 KB (56%) | ✓ | 3rd |
| https://www.oasis-open.org/wp-content/themes/oasis-2020/build/frontend-96934effb79b67041666.js | 30 KB | 21 KB (70%) | ✓ | 3rd |
| https://platform-api.sharethis.com/js/sharethis.js?ver=2.3.8 | 47 KB | 20 KB (43%) | ✗ | 3rd |
| https://www.oasis-open.org/wp-includes/js/jquery/ui/core.min.js?ver=1.13.3 | 8 KB | — | ✓ | 3rd |
| https://www.oasis-open.org/wp-content/plugins/save-as-pdf-by-pdfcrowd/public/js/save-as-pdf-pdfcrowd-components.js?ver=4.5.6 | 1 KB | — | ✓ | 3rd |
| https://www.oasis-open.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 31 KB | — | ✓ | 3rd |
| https://www.oasis-open.org/wp-content/plugins/gutentor/assets/library/wow/wow.min.js?ver=1.2.1 | 3 KB | — | ✓ | 3rd |
| https://www.oasis-open.org/wp-includes/js/dist/hooks.min.js?ver=dd5603f07f9220ed27f1 | 2 KB | — | ✓ | 3rd |
| https://www.oasis-open.org/wp-includes/js/dist/i18n.min.js?ver=c26c3dc7bed366793375 | 3 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
BPage Weight Budget1.1 MB transferred, 75 requestsREVIEW
BImage Optimization18 images, 0 KB saveableREVIEW
CJS Execution CostAction1628ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.oasis-open.org/ | 397ms | 58ms | 7ms | 3rd |
| Unattributable | 351ms | 7ms | 0ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=GT-W62J3VD | 267ms | 209ms | 49ms | 3rd |
| https://www.oasis-open.org/cdn-cgi/challenge-platform/scripts/jsd/main.js | 203ms | 194ms | 2ms | 3rd |
| https://www.oasis-open.org/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 142ms | 116ms | 8ms | 3rd |
| https://platform-api.sharethis.com/js/sharethis.js?ver=2.3.8 | 113ms | 66ms | 17ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=UA-35180637-1&ver=6.9.4 | 85ms | 58ms | 26ms | 3rd |
| https://www.oasis-open.org/wp-content/themes/oasis-2020/build/frontend-96934effb79b67041666.js | 69ms | 41ms | 13ms | 3rd |
BPage Weight Inventory75 resources · 1.1 MB · 171 KB savings availableREVIEW
~171.3 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 75 resources | 1.1 MiB | ||||||
A+Text CompressionAll text resources are compressedPASS
A+Font Loading5 fonts (62 KB)PASS
Web fonts
5
62 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 ~9 KB and ~18 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource Hints2 hints, 0 missing preconnectsPASS
Current Resource Hints
2 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
A+HTTP Cachingmax-age=600 (10 minutes)PASS
max-age=600, must-revalidate
| Directive | Value | Meaning |
|---|---|---|
| max-age | 600 | Cache for 10 minutes |
| must-revalidate | — | Must recheck with server after expiry |
Network Waterfall75 requests over 2921msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.oasis-open.org www.oasis-open.org | Other | 397ms | 29 KB | — | $7/mo | Costly |
Unattributable Unattributable | Other | 351ms | 0 KB | — | $6/mo | Costly |
Google Tag Manager www.googletagmanager.com | Tag Manager | 267ms | 155 KB | 42% | $5/mo | Costly |
www.oasis-open.org www.oasis-open.org | Other | 203ms | 0 KB | — | $4/mo | Costly |
www.oasis-open.org www.oasis-open.org | Other | 142ms | 31 KB | — | $2/mo | Optional |
platform-api.sharethis.com platform-api.sharethis.com | Other | 113ms | 47 KB | 43% | $2/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 85ms | 116 KB | 56% | $1/mo | Optional |
www.oasis-open.org www.oasis-open.org | Other | 69ms | 30 KB | 70% | $1/mo | Optional |
These scripts may cost more than they're worth
- www.oasis-open.org adds 397ms and costs ~$7/month
- Unattributable adds 351ms and costs ~$6/month
- Google Tag Manager adds 267ms and costs ~$5/month
- www.oasis-open.org adds 203ms 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
www.oasis-open.org takes 397ms 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 351ms 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
Google Tag Manager takes 267ms 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.oasis-open.org takes 203ms 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
56% of Google Tag Manager'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
70% of www.oasis-open.org'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