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.
849 ms
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
3.34 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
4 ms
Cumulative Layout Shift Cumulative Layout Shift — measures visual stability. How much the page layout shifts during loading. Under 0.1 is good.
0.076
Speed Index Speed Index — how quickly content is visually displayed during load. Under 3.4s is good.
2.12 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.
4.34 s
Page Load Progression
FPage Weight BudgetAction6.6 MB transferred, 141 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
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 ImpactAction74% third-party, 0 ms blockingFIX
DPage Weight InventoryAction141 resources · 6.6 MB · 216 KB savings availableFIX
~216.4 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 141 resources | 6.6 MiB | ||||||
BImage Optimization72 images, 0 KB saveableREVIEW
BJS Execution Cost806ms total JS executionREVIEW
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 230ms | 2ms | 0ms | 3rd |
| https://gigaom.com/ | 190ms | 17ms | 3ms | 1st |
| https://gigaom.com/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 103ms | 69ms | 2ms | 1st |
| https://js.hsforms.net/forms/embed/v2.js | 94ms | 63ms | 26ms | 3rd |
| https://gigaom.com/cdn-cgi/challenge-platform/scripts/jsd/main.js | 70ms | 66ms | 0ms | 1st |
| https://cdn-4.convertexperiments.com/v1/js/10041278-100412255.js | 66ms | 49ms | 5ms | 3rd |
| https://gigaom.com/wp-includes/js/zxcvbn.min.js | 53ms | 39ms | 14ms | 1st |
CJS BundlesAction38 scripts, 216 KB unusedREVIEW
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://js.hsforms.net/forms/embed/v2.js | 193 KB | 73 KB (39%) | ✓ | 3rd |
| https://gigaom.com/wp-content/plugins/m-chart/components/external/chartjs/chart.js?ver=1.11.1 | 69 KB | 62 KB (89%) | ✓ | 1st |
| https://gigaom.com/wp-content/plugins/katex/assets/katex-0.16.22/katex.min.js?ver=2.2.5 | 75 KB | 33 KB (45%) | ✓ | 1st |
| https://cdn-4.convertexperiments.com/v1/js/10041278-100412255.js | 55 KB | 27 KB (50%) | ✓ | 3rd |
| https://gigaom.com/wp-content/themes/go-understrap/js/child-theme.min.js?ver=1.2.0.1769478388 | 31 KB | 21 KB (69%) | ✓ | 1st |
| https://gigaom.com/wp-content/plugins/fast-user-switching/js/jquery.nicescroll.min.js?ver=1.1 | 17 KB | — | ✓ | 1st |
| https://gigaom.com/wp-content/plugins/go-ui/components/js/external/handlebars.js?ver=1 | 23 KB | — | ✗ | 1st |
| https://gigaom.com/wp-includes/js/zxcvbn-async.min.js?ver=1.0 | 0 KB | — | ✓ | 1st |
| https://gigaom.com/wp-content/plugins/webtoffee-gdpr-cookie-consent/public/js/cookie-law-info-public.js?ver=2.4.0 | 13 KB | — | ✗ | 1st |
| https://gigaom.com/wp-content/themes/go-understrap/js/featherlight.js?ver=1.7.14 | 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
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 Loading9 fonts (993 KB)PASS
Web fonts
9
993 KB total
Render-blocking
0
of 9
Dominant font-display
swap
Most common across fonts
Font loading timeline
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- Subset this font — over 100 KB suggests Latin Extended or full glyph coverage that most pages don't need
- 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 ~406 KB and ~812 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
AHTTP 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 Waterfall141 requests over 1424msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 230ms | 0 KB | — | $1/mo | Costly |
js.hsforms.net js.hsforms.net | Other | 94ms | 193 KB | 39% | $1/mo | Optional |
cdn-4.convertexperiments.com cdn-4.convertexperiments.com | Other | 66ms | 55 KB | 50% | $0/mo | Optional |
These scripts may cost more than they're worth
- Unattributable adds 230ms and costs ~$1/month
48% 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 230ms 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