Fix pooling docs in wsjson

wsjson/wsjson.go

@@ -12,8 +12,7 @@ import (
 )
 
 // Read reads a json message from c into v.
-// If the message is larger than 128 bytes, it will use a buffer
-// from a pool instead of performing an allocation.
+// It will reuse buffers to avoid allocations.
 func Read(ctx context.Context, c *websocket.Conn, v interface{}) error {
 	err := read(ctx, c, v)
 	if err != nil {
@@ -52,7 +51,7 @@ func read(ctx context.Context, c *websocket.Conn, v interface{}) error {
 }
 
 // Write writes the json message v to c.
-// It uses json.Encoder which automatically reuses buffers.
+// It will reuse buffers to avoid allocations.
 func Write(ctx context.Context, c *websocket.Conn, v interface{}) error {
 	err := write(ctx, c, v)
 	if err != nil {