From 5c78d1a342c6f295b7b6fdb8ac9b1a4f8644dc33 Mon Sep 17 00:00:00 2001
From: Vladimir Dubrovin <3proxy@3proxy.ru>
Date: Sun, 11 Oct 2026 20:48:49 +0300
Subject: [PATCH] Return splice support in default builds

---
 CMakeLists.txt | 2 +-
 Makefile.Linux | 8 ++++----
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 09c205a..435e043 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -63,7 +63,7 @@ option(3PROXY_USE_OPENSSL "Enable TLS/SSL support via OpenSSL (fallback when wol
 option(3PROXY_USE_PCRE2 "Enable PCRE2 regex filtering" ON)
 option(3PROXY_USE_PAM "Enable PAM/PamAuth" ON)
 option(3PROXY_USE_ODBC "Enable ODBC support (Unix only, always ON on Windows)" OFF)
-option(3PROXY_USE_SPLICE "Build Linux splice() support, slower than read/write for most traffic (Linux only)" OFF)
+option(3PROXY_USE_SPLICE "Build Linux splice() support, used by services given -s (Linux only)" ON)
 option(3PROXY_USE_POLL "Use poll() instead of select() (Unix only)" ON)
 option(3PROXY_USE_WSAPOLL "Use WSAPoll instead of select() (Windows only)" ON)
 option(3PROXY_USE_NETFILTER "Enable Linux netfilter support (Linux only)" ON)
diff --git a/Makefile.Linux b/Makefile.Linux
index 59079c7..ba7cb12 100644
--- a/Makefile.Linux
+++ b/Makefile.Linux
@@ -4,9 +4,9 @@
 # add -DWITH_ODBC to CFLAGS and -lodbc to LIBS to compile with ODBC
 # library support. Add -DSAFESQL for poorely written ODBC library / drivers.
 #
-# Linux splice() support is not built by default, it is slower than the
-# read/write path for most traffic. Add -DWITHSPLICE to CFLAGS to build it,
-# it must additionally be enabled per service with the -s option.
+# Linux splice() support is built, but used only by services given the -s
+# option: it is faster for large transfers and slower for small requests.
+# Remove -DWITHSPLICE from CFLAGS to build without it.
 
 BUILDDIR = ../bin/
 PREFIX ?= 3proxy_
@@ -14,7 +14,7 @@ CRYPT_PREFIX ?= $(PREFIX)
 CC ?= gcc
 
 CFLAGS ?= -O3 -flto
-CFLAGS += -fno-strict-aliasing -c -pthread -D_GNU_SOURCE -DGETHOSTBYNAME_R -D_THREAD_SAFE -D_REENTRANT -DFD_SETSIZE=4096 -DWITH_POLL -DWITH_NETFILTER -D WITH_UN
+CFLAGS += -fno-strict-aliasing -c -pthread -DWITHSPLICE -D_GNU_SOURCE -DGETHOSTBYNAME_R -D_THREAD_SAFE -D_REENTRANT -DFD_SETSIZE=4096 -DWITH_POLL -DWITH_NETFILTER -D WITH_UN
 COUT = -o 
 LN ?= ${CC}
 DCFLAGS ?= -fPIC