Adding upstream version 2.52.6.

Signed-off-by: Daniel Baumann <daniel@debian.org>

docs/guide/faster-fiber.md

@@ -0,0 +1,36 @@
+---
+id: faster-fiber
+title: ⚡ Make Fiber Faster
+sidebar_position: 7
+---
+
+## Custom JSON Encoder/Decoder
+Since Fiber v2.32.0, we use **encoding/json** as default json library due to stability and producibility. However, the standard library is a bit slow compared to 3rd party libraries. If you're not happy with the performance of **encoding/json**, we recommend you to use these libraries:
+- [goccy/go-json](https://github.com/goccy/go-json)
+- [bytedance/sonic](https://github.com/bytedance/sonic)
+- [segmentio/encoding](https://github.com/segmentio/encoding)
+- [mailru/easyjson](https://github.com/mailru/easyjson)
+- [minio/simdjson-go](https://github.com/minio/simdjson-go)
+- [wI2L/jettison](https://github.com/wI2L/jettison)
+
+```go title="Example"
+package main
+
+import "github.com/gofiber/fiber/v2"
+import "github.com/goccy/go-json"
+
+func main() {
+	app := fiber.New(fiber.Config{
+		JSONEncoder: json.Marshal,
+		JSONDecoder: json.Unmarshal,
+	})
+
+	# ...
+}
+```
+
+### References
+- [Set custom JSON encoder for client](../api/client.md#jsonencoder)
+- [Set custom JSON decoder for client](../api/client.md#jsondecoder)
+- [Set custom JSON encoder for application](../api/fiber.md#config)
+- [Set custom JSON decoder for application](../api/fiber.md#config)