Files
7ffacec8ef Add more realistic bench fixtures (#95807)
This adds more fixtures modeled after Flight payloads from real sites:

- Vercel Dashboard-like (very app-y)
- React Docs-like after App Router conversion (mostly MDX site)
- Vercel Blog-like (passing down data from CMS)

(Actual data is randomly generated with a seed)

These are simplifications but I tried to incorporate the originals'
corresponding quirks. Such as Vercel Dashboard having many client
components; syntax highlight with many small spans in React Docs; Vercel
Blog currently shipping a load of data unnecessarily on the index page.
(The last one is not ideal but I think we should actually benchmark
"bad" cases like this too so I kept that.)


### Screenshots

<img width="1325" height="1021" alt="Screenshot 2026-07-15 at 04 29 43"
src="https://github.com/user-attachments/assets/62c80722-6fd5-4884-89db-106345f6412d"
/>

<img width="1360" height="994" alt="Screenshot 2026-07-15 at 04 30 21"
src="https://github.com/user-attachments/assets/0db93cd8-43ca-41df-b3e2-c422e0c94656"
/>

<img width="1368" height="991" alt="Screenshot 2026-07-15 at 04 30 43"
src="https://github.com/user-attachments/assets/9369e9be-12a4-4a1e-af32-01b6fdd4a457"
/>


### Comparison with real payloads

```
=== dashboard.html (fixture)  vs  p-overview.html (real)
  total KB                            208          637
  rows (model/I/T/other)       186/48/7/1 240/125/5/27
  byte share model/I/T %           92/4/4      36/62/2
  median row size B                   590          106
  max depth                            28           53
  mean depth                          8.4         10.5
  elements per KB(model)             14.9          5.2
  pure-data byte share %               24           21
  client-ref elements %                41           32
  objects:elements ratio             1.17         1.23
  avg props per element               1.7          3.1
  median children fanout                4            4
  string bytes %                       24           54
  median string len B                  10           15
  row refs per KB                     0.9          0.4
  encoded scalars per KB              3.5          1.2
  undefined markers                   347          740

=== docs.html (fixture)  vs  nextjs-docs.html (real)
  total KB                            261          487
  rows (model/I/T/other)        58/15/7/1   55/43/2/20
  byte share model/I/T %           93/1/6       94/6/0
  median row size B                   193          340
  max depth                            27           32
  mean depth                         21.9         12.3
  elements per KB(model)              0.8          0.8
  pure-data byte share %                8            9
  client-ref elements %                16           33
  objects:elements ratio             6.26         4.92
  avg props per element               1.7          2.8
  median children fanout                4            4
  string bytes %                       47           64
  median string len B                  17           35
  row refs per KB                     0.2          0.1
  encoded scalars per KB              7.5          2.9
  undefined markers                  1949         1377

=== blog.html (fixture)  vs  vercel-blog.html (real)
  total KB                            475          797
  rows (model/I/T/other)        41/15/0/1  102/53/7/14
  byte share model/I/T %          100/0/0       87/8/5
  median row size B                   426          505
  max depth                            34           44
  mean depth                          9.7         12.2
  elements per KB(model)              0.8          1.1
  pure-data byte share %               92           85
  client-ref elements %                23           33
  objects:elements ratio            28.92        16.39
  avg props per element               1.9          2.7
  median children fanout                3            4
  string bytes %                       46           48
  median string len B                   6            9
  row refs per KB                     0.1          0.1
  encoded scalars per KB              0.4          0.6
  undefined markers                   161          426
```

---------

Co-authored-by: Claude Fable 5 <[email protected]>
2026-07-15 13:46:22 +02:00

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'use client'
import { describeAuthLayer } from './vendor-auth'
import { useState } from 'react'
export default function AlertBanner({
severity,
title,
body,
action,
dismissible,
}) {
const [dismissed, setDismissed] = useState(false)
if (dismissed) return null
return (
<div className={'alert alert-' + severity} role="status">
<div className="alert-text">
<strong>{title}</strong>
<span>{body}</span>
</div>
{action ? (
<button type="button" className="alert-action">
{action}
</button>
) : null}
{dismissible ? (
<button
type="button"
className="alert-dismiss"
aria-label="Dismiss"
onClick={() => setDismissed(true)}
>
×
</button>
) : null}
</div>
)
}
export const __layers = [describeAuthLayer].length