From 6dea7760cbfc77d09d176fafd9f03c66ddd85543 Mon Sep 17 00:00:00 2001
From: Ryan Huber <rhuber@gmail.com>
Date: Wed, 17 Mar 2021 17:57:05 -0500
Subject: [PATCH] *WIP* this is just test code but works to increase throughput
 on windows significantly. the default windows buffers are 8192KB which is :(

---
 udp_windows.go | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/udp_windows.go b/udp_windows.go
index dcfe884..06f5227 100644
--- a/udp_windows.go
+++ b/udp_windows.go
@@ -11,6 +11,32 @@ import (
 func NewListenConfig(multi bool) net.ListenConfig {
 	return net.ListenConfig{
 		Control: func(network, address string, c syscall.RawConn) error {
+			var controlErr error
+			err := c.Control(func(fd uintptr) {
+				if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.SOL_SOCKET, syscall.SO_SNDBUF, 999999); err != nil {
+					controlErr = fmt.Errorf("SO_SNDBUF failed: %v", err)
+					return
+				}
+			})
+			if err != nil {
+				return err
+			}
+			if controlErr != nil {
+				return controlErr
+			}
+			err = c.Control(func(fd uintptr) {
+				if err := syscall.SetsockoptInt(syscall.Handle(fd), syscall.SOL_SOCKET, syscall.SO_RCVBUF, 999999); err != nil {
+					controlErr = fmt.Errorf("SO_RCVBUF failed: %v", err)
+					return
+				}
+			})
+			if err != nil {
+				return err
+			}
+			if controlErr != nil {
+				return controlErr
+			}
+
 			if multi {
 				// There is no way to support multiple listeners safely on Windows:
 				// https://docs.microsoft.com/en-us/windows/desktop/winsock/using-so-reuseaddr-and-so-exclusiveaddruse