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.
10.82 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
25.49 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
160 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.
10.82 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.
25.84 s
Page Load Progression
FPage Weight BudgetAction6.5 MB transferred, 133 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
DJS Execution CostAction2607ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| Unattributable | 659ms | 8ms | 0ms | 3rd |
| https://gigaom.com/ | 516ms | 65ms | 13ms | 1st |
| https://js.hsforms.net/forms/embed/v2.js | 388ms | 274ms | 102ms | 3rd |
| https://cdn-4.convertexperiments.com/v1/js/10041278-100412255.js | 248ms | 194ms | 19ms | 3rd |
| https://gigaom.com/cdn-cgi/challenge-platform/scripts/jsd/main.js | 224ms | 212ms | 2ms | 1st |
| https://gigaom.com/wp-includes/js/zxcvbn.min.js | 214ms | 138ms | 75ms | 1st |
| https://gigaom.com/wp-includes/js/jquery/jquery.min.js?ver=3.7.1 | 210ms | 158ms | 7ms | 1st |
| https://gigaom.com/wp-content/themes/go-understrap/css/child-theme.min.css?ver=1.2.0.1769478388 | 92ms | 0ms | 0ms | 1st |
| https://gigaom.com/wp-content/plugins/katex/assets/katex-0.16.22/katex.min.js?ver=2.2.5 | 56ms | 37ms | 18ms | 1st |
DPage Weight InventoryAction133 resources · 6.5 MB · 216 KB savings availableFIX
~216.2 KiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 133 resources | 6.5 MiB | ||||||
BImage Optimization64 images, 0 KB saveableREVIEW
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/script.js?ver=1.2 | 1 KB | — | ✓ | 1st |
| https://gigaom.com/wp-content/plugins/go-m-chart/components/js/go-m-chart-theme.min.js?ver=6.9.4 | 2 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 Hints3 hints, 0 missing preconnectsPASS
Current Resource Hints
3 resource hints configured
A+Render-Blocking ResourcesNo render-blocking resources detectedPASS
A+Third-Party ResourcesNo third-party resources detectedPASS
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 Waterfall133 requests over 1516msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
Unattributable Unattributable | Other | 659ms | 0 KB | — | $4/mo | Costly |
js.hsforms.net js.hsforms.net | Other | 388ms | 193 KB | 39% | $2/mo | Costly |
cdn-4.convertexperiments.com cdn-4.convertexperiments.com | Other | 248ms | 55 KB | 50% | $1/mo | Costly |
These scripts may cost more than they're worth
- Unattributable adds 659ms and costs ~$4/month
- js.hsforms.net adds 388ms and costs ~$2/month
- cdn-4.convertexperiments.com adds 248ms and costs ~$1/month
50% 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 659ms 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
js.hsforms.net takes 388ms 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
cdn-4.convertexperiments.com takes 248ms 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