Add docs from gofiber/fiber@091a594

Author: github-actions[bot]

docs/core/whats_new.md

@@ -254,6 +254,34 @@ DRAFT section
 
 ## 🧬 Middlewares
 
+### Adaptor
+
+The adaptor middleware has been significantly optimized for performance and efficiency. Key improvements include reduced response times, lower memory usage, and fewer memory allocations. These changes make the middleware more reliable and capable of handling higher loads effectively. Enhancements include the introduction of a `sync.Pool` for managing `fasthttp.RequestCtx` instances and better HTTP request and response handling between net/http and fasthttp contexts.
+
+| Payload Size | Metric           |     V2    |    V3    |    Percent Change |
+|--------------|------------------|-----------|----------|-------------------|
+| 100KB        | Execution Time   | 1056 ns/op| 588.6 ns/op | -44.25%        |
+|              | Memory Usage     | 2644 B/op | 254 B/op    | -90.39%        |
+|              | Allocations      | 16 allocs/op | 5 allocs/op | -68.75%     |
+| 500KB        | Execution Time   | 1061 ns/op| 562.9 ns/op | -46.94%        |
+|              | Memory Usage     | 2644 B/op | 248 B/op    | -90.62%        |
+|              | Allocations      | 16 allocs/op | 5 allocs/op | -68.75%     |
+| 1MB          | Execution Time   | 1080 ns/op| 629.7 ns/op | -41.68%        |
+|              | Memory Usage     | 2646 B/op | 267 B/op    | -89.91%        |
+|              | Allocations      | 16 allocs/op | 5 allocs/op | -68.75%     |
+| 5MB          | Execution Time   | 1093 ns/op| 540.3 ns/op | -50.58%        |
+|              | Memory Usage     | 2654 B/op | 254 B/op    | -90.43%        |
+|              | Allocations      | 16 allocs/op | 5 allocs/op | -68.75%     |
+| 10MB         | Execution Time   | 1044 ns/op| 533.1 ns/op | -48.94%        |
+|              | Memory Usage     | 2665 B/op | 258 B/op    | -90.32%        |
+|              | Allocations      | 16 allocs/op | 5 allocs/op | -68.75%     |
+| 25MB         | Execution Time   | 1069 ns/op| 540.7 ns/op | -49.42%        |
+|              | Memory Usage     | 2706 B/op | 289 B/op    | -89.32%        |
+|              | Allocations      | 16 allocs/op | 5 allocs/op | -68.75%     |
+| 50MB         | Execution Time   | 1137 ns/op| 554.6 ns/op | -51.21%        |
+|              | Memory Usage     | 2734 B/op | 298 B/op    | -89.10%        |
+|              | Allocations      | 16 allocs/op | 5 allocs/op | -68.75%     |
+
 ### Cache
 
 We are excited to introduce a new option in our caching middleware: Cache Invalidator. This feature provides greater control over cache management, allowing you to define a custom conditions for invalidating cache entries.