https://rewordsai.app
Performance
· 23 checks — Lighthouse + waterfall + sustainability rolled into one auditable list.SCORE
94
GRADE
A
FIX
1
REVIEW
3
PASS
15
INFO
4
Performance-focused optimization plan with CWV assessment, top offenders, and time estimates
85
97
96
100
First Contentful Paint First Contentful Paint — how long until the browser renders the first piece of content. Under 1.8s is good.
1.58 s
Largest Contentful Paint Largest Contentful Paint — how long until the largest visible element loads. Under 2.5s is good.
1.86 s
Total Blocking Time Total Blocking Time — total time the main thread was blocked, preventing user input. Under 200ms is good.
0 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.
1.58 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.
1.87 s
Page Load Progression
421 ms
843 ms
1.3 s 1.7 s
2.1 s 2.5 s 2.9 s
3.4 sChecks
2315 PASS 3 REVIEW 1 FIX
DHTTP CachingActionno-store (uncacheable)FIX
HTTP Caching
Actionno-store (uncacheable)
no-store (uncacheable)
Info::
Cache-Control: no-store prevents all caching
Intentional for dynamic content, but increases server load for every page view.
Got: no-store
Info::
Last-Modified header present
Cache-Control
no-store
| Directive | Value | Meaning |
|---|---|---|
| no-store | — | Never cache this response |
CJS Execution CostAction1349ms total JS executionREVIEW
JS Execution Cost
Action1349ms total JS execution
1349ms total JS execution
Warning::
https://rewordsai.app/assets/framework-DJH1pfSr.js: 578ms CPU time
Warning::
https://rewordsai.app/: 428ms CPU time
Info::
https://rewordsai.app/assets/workspace-C39loqXG.js: 221ms CPU time
Info::
Unattributable: 122ms CPU time
Main Thread Breakdown
Script Evaluation 43% Other 25% Style & Layout 21% Rendering 8%
| Script | Total | Scripting | Parse/Compile | Party |
|---|---|---|---|---|
| https://rewordsai.app/assets/framework-DJH1pfSr.js | 578ms | 534ms | 0ms | 1st |
| https://rewordsai.app/ | 428ms | 8ms | 13ms | 1st |
| https://rewordsai.app/assets/workspace-C39loqXG.js | 221ms | 28ms | 0ms | 1st |
| Unattributable | 122ms | 9ms | 0ms | 1st |
BJS Bundles80 scripts, 99 KB unusedREVIEW
JS Bundles
80 scripts, 99 KB unused
80 scripts, 99 KB unused
Warning::
https://accounts.google.com/gsi/client: 76 KB unused (76%)
Consider code splitting or tree shaking to reduce unused code.
Warning::
https://rewordsai.app/assets/workspace-C39loqXG.js: 23 KB unused (51%)
Consider code splitting or tree shaking to reduce unused code.
Info::
Total unused JavaScript: 99 KB
99 KB unused JavaScript
Downloaded but never executed on this page.
| Script | Size | Unused | Minified | Party |
|---|---|---|---|---|
| https://accounts.google.com/gsi/client | 100 KB | 76 KB (76%) | ✓ | 3rd |
| https://rewordsai.app/assets/workspace-C39loqXG.js | 45 KB | 23 KB (51%) | ✓ | 1st |
| https://rewordsai.app/assets/global-error-CVl8f3Cz.js | 1 KB | — | ✓ | 1st |
| https://rewordsai.app/assets/framework-DJH1pfSr.js | 60 KB | — | ✓ | 1st |
| https://rewordsai.app/assets/rolldown-runtime-QTnfLwEv.js | 1 KB | — | ✓ | 1st |
| https://rewordsai.app/assets/url-utils-BQKFb685.js | 1 KB | — | ✓ | 1st |
| https://rewordsai.app/assets/error-BGW8EmXR.js | 1 KB | — | ✓ | 1st |
| https://rewordsai.app/assets/navigation-B24XBaH8.js | 2 KB | — | ✓ | 1st |
| https://rewordsai.app/assets/react-DlbkFqaW.js | 13 KB | — | ✓ | 1st |
| https://rewordsai.app/assets/BaseLink-43ir4Uok.js | 6 KB | — | ✓ | 1st |
Consider code splitting or tree shaking to reduce unused code.
Why this matters
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.
Why this matters
This bundle has high unused code — code-split or tree-shake to ship only what executes.
Source: web.dev / Lighthouse coverage
BServer-Timing ObservabilityNo Server-Timing header foundREVIEW
Server-Timing Observability
No Server-Timing header found
No Server-Timing header found
Info::
No Server-Timing header found
Server-Timing exposes backend timing breakdowns to browser DevTools (e.g., `db: 45ms; render: 120ms; cache: 2ms`). Useful for diagnosing slow pages without backend log access. Most modern frameworks (Next.js, Cloudflare Workers, Fastly) emit it automatically; absence on a managed platform usually means telemetry headers are stripped at the edge.
A+Page Weight Budget684 KB transferred, 102 requestsPASS
Page Weight Budget
684 KB transferred, 102 requests
684 KB transferred, 102 requests
Info::
Page weighs 1.9 MB (684 KB transferred)
Warning::
102 HTTP requests — consider bundling or reducing
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Info::
Estimated 0.14 g CO2 per page load
684 KB transferred
102 requests
0.14 g CO2 per page load
JavaScript 395.1 KiB 58%
Images 168.0 KiB 25%
HTML 56.4 KiB 8%
CSS 33.0 KiB 5%
Other 24.6 KiB 4%
Other 6.2 KiB 1%
Other 898 B 0%
Other 0 B 0%
0 2.4 MB 4.9 MB
Under budget
Each request adds latency. Bundle small files, use sprites, or eliminate unnecessary requests.
Why this matters
High HTTP request count — bundling, sprite-ing, and HTTP/2 server push can reduce per-request overhead.
Source: web.dev
A+Third-Party Impact16% third-party, 0 ms blockingPASS
Third-Party Impact
16% third-party, 0 ms blocking
16% third-party, 0 ms blocking
Info::
Third-party code accounts for 16% of page weight (107.3 KiB of 684.3 KiB)
Info::
Third-party blocking time is low (0 ms)
84%
16%
First-party Third-party
A+Text CompressionAll text resources are compressedPASS
Text Compression
All text resources are compressed
All text resources are compressed
Info::
All text resources are compressed
All text resources are properly compressed.
A+Image Optimization6 images, 0 KB saveablePASS
Image Optimization
6 images, 0 KB saveable
6 images, 0 KB saveable
Info::
All images are well-optimized
6 images 168 KB
0 oversized -0 KB
0 legacy format
0 missing dimensions CLS risk
A+Font LoadingNo web fonts (system fonts)PASS
Font Loading
No web fonts (system fonts)
No web fonts (system fonts)
Info::
No web fonts loaded — system fonts are fastest
No web fonts loaded — system fonts are optimal.
A+Resource CachingAll resources properly cachedPASS
Resource Caching
All resources properly cached
All resources properly cached
Info::
No caching issues found
All static resources have appropriate caching headers.
A+Critical Rendering PathNo render-blocking resourcesPASS
Critical Rendering Path
No render-blocking resources
No render-blocking resources
Info::
No render-blocking resources detected
A+Resource HintsNo optimization neededPASS
Resource Hints
No optimization needed
No optimization needed
Info::
No resource hint issues
A+HTTP/3 (QUIC)HTTP/3 advertised via Alt-SvcPASS
HTTP/3 (QUIC)
HTTP/3 advertised via Alt-Svc
HTTP/3 advertised via Alt-Svc
Info::
HTTP/3 (QUIC) is supported
First-load mobile users on cellular networks see meaningful latency improvements with HTTP/3. The QUIC transport collapses TLS + TCP handshakes into one and recovers faster from packet loss.
A+Document CompressionDocument response uses brotliPASS
Document Compression
Document response uses brotli
Document response uses brotli
Info::
Main HTML response uses brotli (Content-Encoding: br)
Brotli is the best text-compression algorithm for general use, ~20% smaller than gzip on average (40% on smaller files). Modern browsers all support it.
A+LCP Image PreloadLCP preload audit not availablePASS
LCP Image Preload
LCP preload audit not available
LCP preload audit not available
Info::
LCP image preload audit not available for this scan
A+Main HTML Cache-ControlMain HTML uses no-store -- correct for sensitive/dynamic contentPASS
Main HTML Cache-Control
Main HTML uses no-store -- correct for sensitive/dynamic content
Main HTML uses no-store -- correct for sensitive/dynamic content
Info::
Main HTML uses no-store -- correct for sensitive/dynamic content
Got: no-store
A+Server Response Intelligence2 server-response signal(s) detectedPASS
Server Response Intelligence
2 server-response signal(s) detected
2 server-response signal(s) detected
Info::
`Vary` header declared: RSC, Accept, Next-Router-State-Tree, Next-Router-Prefetch, Next-Router-Segment-P...
The page declares a `Vary` header, telling downstream caches which request headers the response varies on. Critical for content-negotiated responses (compression, language, cookies, device class).
Info::
`Last-Modified` present -- timestamp-based conditional GET supported
Consider also setting `ETag` for stronger revalidation -- ETags are content hashes that don't suffer from clock-skew or DST issues. Last-Modified alone is functional for conditional GETs and not a bug.
A+Page Weight Inventory102 resources · 684 KB · 99 KB savings availablePASS
Page Weight Inventory
102 resources · 684 KB · 99 KB savings available
102 resources · 684 KB · 99 KB savings available
Info::
Within 1MB page-weight target
Got: 684 KB
Info::
~99 KB of savings available
Info::
9 third-party resources (16% of weight)
102 resources · 684.3 KiB · 9 third-party Within 1MB page-weight target
JavaScript 58% · 395.1 KiB
Image 28% · 192.6 KiB
Document 8% · 56.4 KiB
CSS 5% · 33.0 KiB
Other 1% · 7.0 KiB
~98.6 KiB of savings available
Remove unused JavaScript: 98.6 KiB
| # | Resource | Type | Size | Cache | Unused | 3rd party | Issues |
|---|---|---|---|---|---|---|---|
| — | — | ||||||
| 102 resources | 684.3 KiB | ||||||
A+Green HostingWhether the site is served from green-energy infrastructurePASS
Green Hosting
Whether the site is served from green-energy infrastructure
Green Hosting
This site is hosted on green energy infrastructure
Provider: Cloudflare
Asset CompressionNo text asset hosts to measureINFO
Asset Compression
No text asset hosts to measure
No text asset hosts to measure
Info::
No third-party or subdomain host served enough text assets to measure
Asset compression is measured per host, from one HEAD request against a sampled resource. Pages that serve all their JS and CSS from the document's own origin are covered by the document compression check instead.
Network Waterfall102 requests over 1048msINFO
Network Waterfall
102 requests over 1048ms
HTML JavaScript CSS Images Fonts XHR/Fetch Other
Real-User Performance (CrUX)Field metrics from the Chrome User Experience ReportINFO
Real-User Performance (CrUX)
Field metrics from the Chrome User Experience Report
Chrome User Experience (CrUX)
Real-user metrics from the Chrome UX Report (2026-09-21 — 2026-10-18)
LCP (p75)
2834 ms
68% good
INP (p75)
183 ms
78% good
CLS (p75)
0.040
84% good
FCP (p75)
2726 ms
TTFB (p75)
1962 ms
Image Optimization15 images, 298 KB total, 211 KB wastedINFO
Image Optimization
15 images, 298 KB total, 211 KB wasted
Image Optimization Audit
Total Images
15
Total Size
298 KB
Oversized
2
Wasted
211 KB
2 missing lazy loading
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.