diff --git a/ChangeLog b/ChangeLog
index ef89f4ce..ed9fa8f0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,9 @@
 # ChangeLog for eix - Ebuild IndeX for portage
 
+*eix-0.34.9
+	Jan Ziak <0xe2.0x9a.0x9b at gmail.com>:
+	- Use sse2 for speedup of eix-update.
+
 *eix-0.34.8
 	Martin Väth <martin at mvath.de>:
 	- Fix regression of 0.34.6 (and 0.34.5): Fix override_by_map. Thanks to
diff --git a/config.h.in b/config.h.in
index b36ab70d..bc5c082b 100644
--- a/config.h.in
+++ b/config.h.in
@@ -400,6 +400,9 @@
 /* Define to 1 if you have the ANSI C header files. */
 #undef STDC_HEADERS
 
+/* Define if support for sse2 is wanted */
+#undef SUPPORT_SSE2
+
 /* Define if __attribute__ ((const)) can be used for const virtuals */
 #undef USE_PURE_FOR_CONST_VIRTUALS
 
diff --git a/configure.ac b/configure.ac
index ffddad2c..f541743a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -41,7 +41,7 @@ dnl    each item is listed in a separate line with indent level increased;
 dnl    in such a case the opening/closing braces are isolated.
 dnl 2. The AC_INIT macro must be in one line since it is parsed by
 dnl    primitive scripts.
-AC_INIT([eix], [0.34.8], [https://github.com/vaeth/eix/issues/], [eix], [https://github.com/vaeth/eix/])
+AC_INIT([eix], [0.34.9], [https://github.com/vaeth/eix/issues/], [eix], [https://github.com/vaeth/eix/])
 AC_PREREQ([2.64])
 
 m4_ifdef([AC_CONFIG_MACRO_DIR],
@@ -919,6 +919,8 @@ AC_ARG_WITH([extra-doc],
 	[AS_VAR_SET([extra_doc], [false])])
 AM_CONDITIONAL([EXTRA_DOC], [$extra_doc])
 
+
+
 # Use paranoic asserts?
 AC_MSG_CHECKING([whether paranoic asserts are used])
 AS_IF([$paranoicassert],
@@ -1620,7 +1622,7 @@ AC_MSG_CHECKING([whether emplace can be used])
 MV_RUN_IFELSE_LINK([AC_LANG_PROGRAM([[
 #include <set>
 #include <utility>
-	]], [[
+		]], [[
 typedef std::pair<int, int> mypair;
 std::set<mypair> a;
 a.insert(mypair(4, 4));
@@ -1632,6 +1634,31 @@ return (a.size() == 2) ? 0 : 1;
 			[Define if STL has emplace])],
 		[MV_MSG_RESULT([no])])
 
+# Check if sse2 can be used
+AC_MSG_CHECKING([whether sse2 should be used])
+AS_VAR_SET([support_sse2], [false])
+AC_ARG_WITH([sse2],
+	[AS_HELP_STRING([--with-sse2],
+		[Use sse2 instruction set])],
+	[AS_CASE(["$withval"],
+		[no], [MV_MSG_RESULT([no], [on request])],
+		[MV_MSG_RESULT([yes], [on request])
+			AS_VAR_SET([support_sse2], [:])])],
+	[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <emmintrin.h>
+]], [[
+#ifndef __SSE2__
+#error "SSE2 not available"
+#endif
+		]])],
+		[MV_MSG_RESULT([yes], [autodetected])
+		AS_VAR_SET([support_sse2], [:])],
+		[MV_MSG_RESULT([no], [autodetected])])])
+AS_IF([$support_sse2],
+	[AC_DEFINE([SUPPORT_SSE2],
+		[1],
+		[Define if support for sse2 is wanted])])
+
 # reset the CXXFLAGS, LDFLAGS for the normal tests
 AS_VAR_COPY([CXXFLAGS], [my_cxxflags])
 AS_VAR_COPY([LDFLAGS], [my_ldflags])
diff --git a/meson.build b/meson.build
index 3841ef0e..459beaa0 100644
--- a/meson.build
+++ b/meson.build
@@ -1,5 +1,5 @@
 project('eix', 'cpp',
-	version : '0.34.8',
+	version : '0.34.9',
 	license : 'GPLv2',
 	default_options : [
 		'prefix=/usr',
@@ -1370,6 +1370,24 @@ message('emplace: ' + have_emplace.to_string())
 conf.set('HAVE_EMPLACE', have_emplace,
 	description : 'Define if STL has emplace')
 
+sse2 = get_option('sse2')
+support_sse2 = false
+sse2_msg = ''
+if sse2 == 'auto'
+	sse2_msg = ' (auto)'
+	support_sse2 = cxx.compiles('''
+#include <emmintrin.h>
+#ifndef __SSE2__
+#error "SSE2 not available"
+#endif
+''', args : flags_dialect)
+elif sse2 == 'true'
+	support_sse2 = true
+endif
+message('sse2: ' + support_sse2.to_string() + sse2_msg)
+conf.set('SUPPORT_SSE2', support_sse2,
+	description : 'Define if support for sse2 is wanted')
+
 sqlite_dep = []
 with_sqlite = false
 want_sqlite = get_option('sqlite')
@@ -1383,7 +1401,7 @@ if want_sqlite != 'false'
 		sqlite_dep = [sqlite_only_dep]
 		with_sqlite = true
 		want_sqlite = 'true'
-	elif want_sqlite == true
+	elif want_sqlite == 'true'
 		error('sqlite required by option but not found')
 	else
 		want_sqlite = 'false'
diff --git a/meson_options.txt b/meson_options.txt
index ffd00b98..d4268981 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -40,6 +40,8 @@ option('swap-remote', type : 'boolean', value : false,
 	description : 'swap the remote paths')
 option('extra-doc', type : 'boolean', value : false,
 	description : 'install developer documentation. Might need rst2html.py from docutils')
+option('sse2', type : 'combo', choices : [ 'auto', 'true', 'false' ],
+	description : 'Compile in support for sse2')
 option('sqlite', type : 'combo', choices : [ 'auto', 'true', 'false' ],
 	description : 'Compile in support for cache method sqlite')
 option('protobuf', type : 'combo', choices : [ 'auto', 'true', 'false' ],
diff --git a/src/eixTk/stringlist.cc b/src/eixTk/stringlist.cc
index dccf6fc1..a08cee34 100644
--- a/src/eixTk/stringlist.cc
+++ b/src/eixTk/stringlist.cc
@@ -101,6 +101,6 @@ void StringList::push_back(std::string&& s) {
 		ptr->usage = 1;
 #endif
 	}
-	ptr->push_back(std::move(s));
+	ptr->push_back(MOVE(s));
 }
 #endif
diff --git a/src/eixTk/stringlist.h b/src/eixTk/stringlist.h
index f8eccf98..29df1a0d 100644
--- a/src/eixTk/stringlist.h
+++ b/src/eixTk/stringlist.h
@@ -19,10 +19,8 @@
 #include "eixTk/attribute.h"
 #ifdef STRINGLIST_FREE
 #include "eixTk/inttypes.h"
-#ifdef HAVE_MOVE
 #include "eixTk/dialect.h"
 #endif
-#endif
 #include "eixTk/diagnostics.h"
 #include "eixTk/null.h"
 #include "eixTk/stringtypes.h"
@@ -65,7 +63,7 @@ class StringListContent {
 
 #ifdef HAVE_MOVE
 		void push_back(std::string&& s) {
-			m_list.PUSH_BACK(std::move(s));
+			m_list.PUSH_BACK(MOVE(s));
 		}
 #endif
 
diff --git a/src/eixTk/stringutils.cc b/src/eixTk/stringutils.cc
index 17001162..9c6518f7 100644
--- a/src/eixTk/stringutils.cc
+++ b/src/eixTk/stringutils.cc
@@ -12,6 +12,10 @@
 
 #include <fnmatch.h>
 
+#ifdef SUPPORT_SSE2
+#include <emmintrin.h>
+#endif
+
 #include <locale>
 
 #include <cstdlib>
@@ -30,9 +34,6 @@
 #include "eixTk/null.h"
 #include "eixTk/stringtypes.h"
 
-#ifdef __SSE2__
-#include <emmintrin.h>
-#endif
 
 using std::string;
 using std::vector;
@@ -292,7 +293,7 @@ static void erase_escapes(string *s, const char *at) {
 }
 
 static string::size_type find_first_of(const string& str, const char *at, string::size_type pos, size_t at_len) {
-#ifdef __SSE2__
+#ifdef SUPPORT_SSE2
 	const char *s = str.c_str();
 	const string::size_type str_size = str.size();
 
diff --git a/src/eixTk/stringutils.h b/src/eixTk/stringutils.h
index 999a11bf..8051dd99 100644
--- a/src/eixTk/stringutils.h
+++ b/src/eixTk/stringutils.h
@@ -484,7 +484,7 @@ template<typename T> inline static void push_back(std::vector<T> *v, const T& e)
 }
 #ifdef HAVE_MOVE
 template<typename T> inline static void push_back(std::vector<T> *v, T&& e) {
-	v->PUSH_BACK(std::move(e));
+	v->PUSH_BACK(MOVE(e));
 }
 #endif
 
@@ -496,7 +496,7 @@ template<typename T> inline static void push_back(std::set<T> *s, const T& e) {
 }
 #ifdef HAVE_MOVE
 template<typename T> inline static void push_back(std::set<T> *s, T&& e) {
-	s->INSERT(std::move(e));
+	s->INSERT(MOVE(e));
 }
 #endif
 
@@ -509,7 +509,7 @@ template<typename T> inline static void push_back(UNORDERED_SET<T> *s, const T&
 }
 #ifdef HAVE_MOVE
 template<typename T> inline static void push_back(UNORDERED_SET<T> *s, T&& e) {
-	s->INSERT(std::move(e));
+	s->INSERT(MOVE(e));
 }
 #endif
 #endif  // HAVE_UNORDERED_SET