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.
2.78 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
5.69 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
1.92 s
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.
5.70 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.
11.16 s
Page Load Progression
653 ms 1.3 s 2.0 s 2.6 s 3.3 s
3.9 s
4.6 s
5.2 sFPage Weight BudgetAction6.4 MB transferred, 225 requestsFIX
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
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
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
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 CostAction5132ms total JS executionFIX
Main Thread Breakdown
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://www.denverpost.com/_static/??-eJyVj8EKwjAQRH/IdlG07UU8ePHiR4QmNluT3dDdKPbrjYKiF8HjDPOYGbimqmdSRwrqXXQCxYlGmMCiKIwCLIZ4n0U51hGpHmUBH1gKeUASiDRUXsMbK/qg4chWflHJszKdMAS4OLI8QcJe8+Qe1n9gMPNNcHZffUh9yLbcKoueyzzz+ZXYxe2ybdfNqum6zXgHXmRkBw== | 1792ms | 1750ms | 1ms | 3rd |
| https://cmp.osano.com/16A1AnRt2Fn8i1unj/1edc45d9-1a78-48b2-9035-037b31df744a/osano.js | 708ms | 628ms | 6ms | 3rd |
| https://www.denverpost.com/ | 466ms | 65ms | 4ms | 3rd |
| Unattributable | 383ms | 48ms | 0ms | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js | 271ms | 240ms | 13ms | 3rd |
| https://www.denverpost.com/_static/??-eJylzLEKgDAMBNAf0gZFWhzE1d+oWkqkjWJS9POtk7jqdHDcPTi2clpJHAlsIXkkhki+nNEjp5GBxQpOr05Fi6TGRHNwauECvhj5QO6Uv0weowQXc/JfK+Fgb2B/oD52lTHatLrR9XIBv8ZxJw== | 203ms | 170ms | 27ms | 3rd |
| https://cdn.p-n.io/pushly-sdk.min.js?domain_key=WZUt8dwXwUZotnPfklpQcv7B2rwEoNFUnwAN&ver=6.9.4 | 162ms | 137ms | 3ms | 3rd |
| https://cdn.adapex.io/hb/aaw.empowerlocal_c.js | 132ms | 116ms | 11ms | 3rd |
| https://connext-fd-gnbrate4fjhjb3f7.z01.azurefd.net/index.js | 131ms | 111ms | 1ms | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-9X3Z9L7GQJ&cx=c>m=4e64k0h2 | 100ms | 76ms | 9ms | 3rd |
Showing top 10 of 20 scripts
FJS BundlesAction106 scripts, 1.9 MB unusedFIX
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://engage.denverpost.com/prod/dfm/t8y9347t.min.js?2026321 | 292 KB | 186 KB (64%) | ✓ | 3rd |
| https://securepubads.g.doubleclick.net/pagead/managed/js/gpt/m202604160201/pubads_impl.js | 188 KB | 127 KB (68%) | ✓ | 3rd |
| https://www.denverpost.com/_static/??-eJylzLEKgDAMBNAf0gZFWhzE1d+oWkqkjWJS9POtk7jqdHDcPTi2clpJHAlsIXkkhki+nNEjp5GBxQpOr05Fi6TGRHNwauECvhj5QO6Uv0weowQXc/JfK+Fgb2B/oD52lTHatLrR9XIBv8ZxJw== | 155 KB | 126 KB (81%) | ✓ | 3rd |
| https://prodmg2.blob.core.windows.net/newsletterwidget/mngcep/mg2nw.min.js | 144 KB | 110 KB (77%) | ✓ | 3rd |
| https://cdn.adapex.io/hb/aaw.empowerlocal_c.js | 169 KB | 100 KB (60%) | ✓ | 3rd |
| https://cds.connatix.com/p/320810193/connatix.player.js | 139 KB | 95 KB (68%) | ✓ | 3rd |
| https://www.denverpost.com/_static/??-eJzTLy/QTc7PK0nNK9EvyClNz8wr1s/NS9dNyUzPLC5NKtYvLkksyUxGEdNLLAIK5aQGZyQWpeolleal5KTqZRXr6FNiVmIZklH2ubaG5uZm5pZmJmZGWQApJTzP | 127 KB | 95 KB (75%) | ✓ | 3rd |
| https://htlbid.com/v3/denverpost.com/htlbid.js?ver=6.9.4 | 137 KB | 81 KB (59%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-WGJ1CSMGXM&l=MG2DL&cx=c>m=4e64h1 | 161 KB | 77 KB (48%) | ✓ | 3rd |
| https://www.googletagmanager.com/gtag/js?id=G-KVX6E4M7J9&l=cswDataLayer&cx=c>m=4e64h1 | 144 KB | 72 KB (50%) | ✓ | 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
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
FPage Weight InventoryAction225 resources · 6.4 MB · 1.9 MB savings availableFIX
~1.9 MiB of savings available
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 225 resources | 6.4 MiB | ||||||
BImage Optimization41 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
CGreen HostingActionWhether the site is served from green-energy infrastructureREVIEW
Green Hosting
No green hosting detected
BHTTP CachingprivateREVIEW
private
| Directive | Value | Meaning |
|---|---|---|
| private | — | Only browser cache, not CDN/proxy |
A+Text CompressionAll text resources are compressedPASS
A+Font Loading7 fonts (235 KB)PASS
Web fonts
7
235 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
- Convert to woff2 for ~30% smaller file size
- 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 ~23 KB and ~46 ms
A+Resource CachingAll resources properly cachedPASS
A+Critical Rendering PathNo render-blocking resourcesPASS
A+Resource HintsNo optimization neededPASS
Network Waterfall225 requests over 10543msINFO
Third-Party Script CostPer-script blocking time, transfer cost, and cache headersINFO
| Script | Category | Execution | Transfer | Unused | Monthly Cost | Verdict |
|---|---|---|---|---|---|---|
www.denverpost.com www.denverpost.com | Other | 1792ms | 10 KB | — | $10/mo | Costly |
cmp.osano.com cmp.osano.com | Other | 708ms | 63 KB | — | $4/mo | Costly |
www.denverpost.com www.denverpost.com | Other | 466ms | 49 KB | — | $3/mo | Costly |
Unattributable Unattributable | Other | 383ms | 0 KB | — | $2/mo | Costly |
securepubads.g.doubleclick.net securepubads.g.doubleclick.net | Other | 271ms | 188 KB | 68% | $2/mo | Costly |
www.denverpost.com www.denverpost.com | Other | 203ms | 155 KB | 81% | $1/mo | Costly |
cdn.p-n.io cdn.p-n.io | Other | 162ms | 0 KB | — | $1/mo | Optional |
cdn.adapex.io cdn.adapex.io | Other | 132ms | 169 KB | 60% | $1/mo | Optional |
connext-fd-gnbrate4fjhjb3f7.z01.azurefd.net connext-fd-gnbrate4fjhjb3f7.z01.azurefd.net | Other | 131ms | 3 KB | — | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 100ms | 175 KB | 38% | $1/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 89ms | 171 KB | 38% | $1/mo | Optional |
htlbid.com htlbid.com | Other | 87ms | 137 KB | 59% | $0/mo | Optional |
fundingchoicesmessages.google.com fundingchoicesmessages.google.com | Other | 85ms | 70 KB | 54% | $0/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 84ms | 145 KB | 40% | $0/mo | Optional |
engage.denverpost.com engage.denverpost.com | Other | 80ms | 292 KB | 64% | $0/mo | Optional |
Google Tag Manager www.googletagmanager.com | Tag Manager | 77ms | 213 KB | 25% | $0/mo | Optional |
sdk.mrf.io sdk.mrf.io | Other | 76ms | 63 KB | 39% | $0/mo | Optional |
tagan.adlightning.com tagan.adlightning.com | Other | 76ms | 15 KB | — | $0/mo | Optional |
s.cdn.gcprivacy.net s.cdn.gcprivacy.net | Other | 75ms | 9 KB | — | $0/mo | Optional |
jsDelivr cdn.jsdelivr.net | CDN | 55ms | 81 KB | 47% | $0/mo | Optional |
These scripts may cost more than they're worth
- www.denverpost.com adds 1792ms and costs ~$10/month
- cmp.osano.com adds 708ms and costs ~$4/month
- www.denverpost.com adds 466ms and costs ~$3/month
- Unattributable adds 383ms and costs ~$2/month
- securepubads.g.doubleclick.net adds 271ms and costs ~$2/month
- www.denverpost.com adds 203ms and costs ~$1/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.denverpost.com takes 1792ms 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
cmp.osano.com takes 708ms 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.denverpost.com takes 466ms 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 383ms 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
securepubads.g.doubleclick.net takes 271ms 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
68% of securepubads.g.doubleclick.net'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
www.denverpost.com 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
81% of www.denverpost.com'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
60% of cdn.adapex.io'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
59% of htlbid.com'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
54% of fundingchoicesmessages.google.com'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
64% of engage.denverpost.com'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