feat: add buffer pool

internal/proxy/buffer_pool.go

@@ -0,0 +1,30 @@
+package proxy
+
+import (
+	"net/http/httputil"
+	"sync"
+)
+
+const DefaultMaxBufferSize = 1024 * 32 // MB
+
+type bufferPool struct {
+	pool sync.Pool
+}
+
+func (b *bufferPool) Get() []byte {
+	return b.pool.Get().([]byte)
+}
+
+func (b *bufferPool) Put(bytes []byte) {
+	b.pool.Put(bytes) // nolint:staticcheck
+}
+
+func newBufferPool() httputil.BufferPool {
+	return &bufferPool{
+		pool: sync.Pool{
+			New: func() interface{} {
+				return make([]byte, DefaultMaxBufferSize)
+			},
+		},
+	}
+}

internal/proxy/proxy.go

@@ -85,6 +85,8 @@ func (h *Proxy) AddTarget(target TargetConfig) error {
 		return err
 	}
 
+	proxy.BufferPool = newBufferPool()
+
 	h.targets = append(
 		h.targets,
 		&HTTPTarget{