diff --git a/.gitignore b/.gitignore
index 7d8b0da..dbd2075 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,7 @@
 bin/
 lib/
-CMakeLists.txt.user
-
+cpputil.creator
+cpputil.creator.user
+cpputil.files
+cpputil.includes
+cpputil.config
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
deleted file mode 100755
index 4f85f53..0000000
--- a/CMakeLists.txt
+++ /dev/null
@@ -1,20 +0,0 @@
-cmake_minimum_required(VERSION 2.8)
-
-set(CMAKE_BUILD_TYPE DEBUG)
-
-if(WIN32)
-	set(CMAKE_CXX_FLAGS " /D _VARIADIC_MAX=10")
-else()
-	set(CMAKE_CXX_FLAGS "-std=c++11")
-	set(CMAKE_CXX_FLAGS_DEBUG "-g -O0")
-	set(CMAKE_CXX_FLAGS_RELEASE "-O2")
-endif()
-
-set(EXECUTABLE_OUTPUT_PATH ${CMAKE_SOURCE_DIR}/bin)
-set(LIBRARY_OUTPUT_PATH ${CMAKE_SOURCE_DIR}/lib)
-set(CMAKE_INSTALL_PREFIX ${CMAKE_SOURCE_DIR}/usr)
-
-include_directories(include)
-
-add_subdirectory(src)
-add_subdirectory(test)
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..b6a093d
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,58 @@
+# assembler
+AS = /home/selim/progs/bin/fasm
+ASFLAGS =
+#LINKER = ld
+#ASLDFLAGS = -lc -e main -dynamic-linker /lib64/ld-linux-x86-64.so.2
+
+# Target platform
+ARCH = x86_64
+OS = linux
+
+# C++ compier
+CXX = g++
+CXXFLAGS = -MMD -c -g -Og -Wall -Werror -std=c++11 -Iinclude -Isrc/asm/include
+LDFLAGS = -lgtest
+
+# Archiver
+AR = ar
+
+BINDIR = bin
+LIBDIR = lib
+OBJDIR = obj
+
+CPPUTIL_CXX_SOURCES = $(wildcard src/*.cpp)
+CPPUTIL_ASM_SOURCES = $(wildcard src/asm/$(OS)/$(ARCH)/*.s)
+CPPUTIL_OBJECTS = $(CPPUTIL_CXX_SOURCES:%.cpp=$(OBJDIR)/%.o) $(CPPUTIL_ASM_SOURCES:%.s=$(OBJDIR)/%.o)
+CPPUTIL_DEPS = $(CPPUTIL_CXX_SOURCES:%.cpp=$(OBJDIR)/%.d)
+
+TEST_SOURCES = $(wildcard test/*.cpp)
+TEST_OBJECTS = $(TEST_SOURCES:%.cpp=$(OBJDIR)/%.o)
+TEST_DEPS = $(TEST_SOURCES:%.cpp=$(OBJDIR)/%.d)
+
+all: $(BINDIR)/cpputil_test $(LIBDIR)/libcpputil.a
+
+$(BINDIR)/cpputil_test: bindir $(TEST_OBJECTS) lib/libcpputil.a
+	$(CXX) $(LDFLAGS) -o $(BINDIR)/cpputil_test $(TEST_OBJECTS) $(LIBDIR)/libcpputil.a
+
+$(LIBDIR)/libcpputil.a: libdir $(CPPUTIL_OBJECTS)
+	$(AR) rcs $(LIBDIR)/libcpputil.a $(CPPUTIL_OBJECTS)
+
+-include $(CPPUTIL_DEPS) $(TEST_DEPS)
+
+$(OBJDIR)/%.o: %.cpp
+	$(CXX) $(CXXFLAGS) $< -o $@
+
+$(OBJDIR)/%.o: %.s
+	$(AS) $(ASFLAGS) $< $@
+
+bindir: objdir
+	mkdir -p $(BINDIR)
+
+libdir: objdir
+	mkdir -p $(LIBDIR)
+
+objdir:
+	mkdir -p $(dir $(CPPUTIL_OBJECTS) $(TEST_OBJECTS))
+
+clean:
+	rm -rf $(LIBDIR) $(BINDIR) $(OBJDIR)
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
deleted file mode 100755
index 652ddb2..0000000
--- a/src/CMakeLists.txt
+++ /dev/null
@@ -1,19 +0,0 @@
-cmake_minimum_required(VERSION 2.8)
-
-set(MAIN_PROJECT_NAME "cpputil")
-set(SRC_DIR ".")
-set(INCLUDE_DIR "../include")
-
-project(${MAIN_PROJECT_NAME} CXX)
-aux_source_directory(${SRC_DIR} SRC_FILES)
-include_directories(${INCLUDE_DIR})
-add_library(${MAIN_PROJECT_NAME} STATIC ${SRC_FILES})
-target_link_libraries(${MAIN_PROJECT_NAME})
-
-install(TARGETS ${MAIN_PROJECT_NAME}
-	RUNTIME DESTINATION bin
-	ARCHIVE DESTINATION lib)
-
-install(DIRECTORY ${INCLUDE_DIR}/
-	DESTINATION include/${PROJECT_NAME}
-	FILES_MATCHING PATTERN "*.h")
diff --git a/src/asm/include/ustring_asm.h b/src/asm/include/ustring_asm.h
new file mode 100644
index 0000000..b6f8c4c
--- /dev/null
+++ b/src/asm/include/ustring_asm.h
@@ -0,0 +1,9 @@
+#ifndef _USTRING_ASM_
+#define _USTRING_ASM_
+
+extern "C" 
+{
+	const char32_t* _asm_ucs4_strstr(const char32_t* srcStr, std::size_t srcLen, const char32_t* subStr, std::size_t subStrLen);
+}
+
+#endif // _USTRING_ASM_
\ No newline at end of file
diff --git a/src/asm/linux/x86_64/ustring_asm.s b/src/asm/linux/x86_64/ustring_asm.s
new file mode 100644
index 0000000..d03bc5f
--- /dev/null
+++ b/src/asm/linux/x86_64/ustring_asm.s
@@ -0,0 +1,97 @@
+format ELF64
+
+;
+; public exported functions
+;
+
+public _asm_ucs4_strstr
+public _asm_ucs4_strchr
+
+;
+; code section
+;
+
+section '.text' executable
+
+; constants
+
+npos = -1
+
+;================================================================================
+;
+; Поиск подстроки в строке UCS-4 (алгоритм "в лоб", подойдет для коротких строк)
+;
+; rdi: указатель на исходную строку
+; rsi: длина исходной строки символах
+; rdx: указатель на искомую подстроку
+; rcx: длина подстроки в символах
+;
+;================================================================================
+
+_asm_ucs4_strstr:
+
+	xor		r8, r8
+	mov		r9d, dword [rdx]
+
+	strstr_try_next_symbol:
+
+		cmp		r9d, dword [rdi + r8*4]
+		je 		strstr_init_counter
+		inc		r8
+		cmp		rsi, r8
+		jne		strstr_try_next_symbol
+		mov		rax, 0
+		ret
+
+	strstr_init_counter:
+
+		xor		r10, r10
+
+	strstr_symbol_found:
+
+		inc		r10
+		cmp		r10, rcx
+		je 		strstr_the_end
+		lea		rax, [r8 + r10]
+		mov		r11d, dword [rdi + rax*4]
+		cmp		r11d, dword [rdx + r10*4]
+		je		strstr_symbol_found
+		inc 	r8
+		jmp		strstr_try_next_symbol
+
+	strstr_the_end:
+
+		lea		rax, [rdi + r8*4]
+
+	ret
+
+;================================================================================
+;
+; Поиск символа в строке UCS-4
+;
+; rdi: указатель на исходную строку
+; rsi: длина исходной строки символах
+; rdx: искомый символ
+;
+;================================================================================
+
+_asm_ucs4_strchr:
+
+	xor		r8, r8
+
+	try_next_symbol:
+
+		cmp		rdx, [rdi]
+		je 		symbol_found
+		add		rdi, 4
+		inc		r8
+		cmp		rsi, r8
+		jne		try_next_symbol
+		mov		rax, 0
+		ret
+
+	symbol_found:
+
+		mov		rax, rdi
+
+	ret
diff --git a/src/ustring.cpp b/src/ustring.cpp
index 14f6bc3..1e7148f 100755
--- a/src/ustring.cpp
+++ b/src/ustring.cpp
@@ -1,4 +1,5 @@
 #include "ustring.h"
+#include "ustring_asm.h"
 #include <cstring>
 #include <fstream>
 
@@ -381,11 +382,18 @@ std::size_t ustring::find(const ustring& str, std::size_t pos /* = 0 */) const
 	}
 
 #ifdef __GNUC__
+    /*
     char32_t* fpos = reinterpret_cast<char32_t*>(memmem(_pData + pos, (_len - pos)*sizeof(char32_t), str._pData, str._len*sizeof(char32_t)));
     if(fpos)
     {
         return (fpos - _pData);
     }
+    */
+    const char32_t* fpos = _asm_ucs4_strstr(_pData + pos, (_len - pos), str._pData, str._len);
+    if(fpos)
+    {
+    	return (fpos - _pData);
+    }
 #else
 	const char32_t* pStr = str._pData;
 	const std::size_t len = _len - str.length();
diff --git a/src/utf.cpp b/src/utf.cpp
index 45a6c68..28d47ce 100755
--- a/src/utf.cpp
+++ b/src/utf.cpp
@@ -301,7 +301,6 @@ std::size_t ucs4_get_utf8_str_bytes(const char32_t* str, bool needEscape)
  */
 std::size_t utf8_get_symbol_size(const char* str, bool needUnescape)
 {
-	uint32_t s = 0;
     if(needUnescape && *str == '\\') // UCS unescape
     {
 		if(*(str + 1) == 'u')
@@ -371,7 +370,6 @@ std::size_t ucs4_get_utf8_symbol_size(const char32_t symbol, bool needEscape)
 	std::size_t sBits = significant_bits(symbol);
 	std::size_t sixBitBytes = sBits / 6;
 	std::size_t restBits = sBits % 6;
-	uint32_t s = static_cast<uint32_t>(symbol);
 	
 	if(sBits <= 7)
 	{
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
deleted file mode 100755
index 792cc69..0000000
--- a/test/CMakeLists.txt
+++ /dev/null
@@ -1,55 +0,0 @@
-cmake_minimum_required(VERSION 2.8)
-
-set(TEST_PROJECT_NAME "cpputil_test")
-set(SRC_DIR ".")
-set(REQUIRED_LIBRARIES cpputil)
-
-if(WIN32)
-	INCLUDE(ExternalProject)
-	SET_DIRECTORY_PROPERTIES(PROPERTIES EP_PREFIX ${CMAKE_BINARY_DIR}/ThirdParty)
-	
-	ExternalProject_Add(
-		googletest
-		SVN_REPOSITORY http://googletest.googlecode.com/svn/trunk/
-		TIMEOUT 100
-		CMAKE_ARGS -DCMAKE_ARCHIVE_OUTPUT_DIRECTORY_DEBUG:PATH=Debug
-				   -DCMAKE_ARCHIVE_OUTPUT_DIRECTORY_RELEASE:PATH=Release
-				   -Dgtest_force_shared_crt=ON
-				   -DCMAKE_CXX_FLAGS=${CMAKE_CXX_FLAGS}
-				   -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
-		INSTALL_COMMAND ""
-		LOG_DOWNLOAD ON
-		LOG_CONFIGURE ON
-		LOG_BUILD ON)
-		
-	ExternalProject_Get_Property(googletest source_dir)
-	ExternalProject_Get_Property(googletest binary_dir)
-	INCLUDE_DIRECTORIES(${source_dir}/include)
-	#link_directories(${binary_dir}/Debug)
-else()
-	FIND_PACKAGE(GTest REQUIRED)
-	if(NOT GTEST_FOUND)
-		message(SEND_ERROR "Failed to find Google Test Framework")
-		return()
-	else()
-		include_directories(${GTEST_INCLUDE_DIRS})
-	endif()
-endif()
-
-project(${TEST_PROJECT_NAME} CXX)
-aux_source_directory(${SRC_DIR} TEST_SRC)
-add_executable(${TEST_PROJECT_NAME} ${TEST_SRC})
-SET_TARGET_PROPERTIES(${TEST_PROJECT_NAME} PROPERTIES ENABLE_EXPORTS TRUE)
-ADD_DEPENDENCIES(${TEST_PROJECT_NAME} googletest)
-
-if(WIN32)
-	target_link_libraries(${TEST_PROJECT_NAME} ${REQUIRED_LIBRARIES}
-		debug ${binary_dir}/Debug/gtest.lib
-		optimized ${binary_dir}/Release/gtest.lib)
-else()
-	target_link_libraries(${TEST_PROJECT_NAME} ${REQUIRED_LIBRARIES} gtest)
-endif()
-
-install(TARGETS ${TEST_PROJECT_NAME}
-	RUNTIME DESTINATION bin
-	ARCHIVE DESTINATION lib)
diff --git a/test/main.cpp b/test/main.cpp
index 7948a91..011da48 100755
--- a/test/main.cpp
+++ b/test/main.cpp
@@ -439,6 +439,7 @@ TEST(Ustring, find_string)
 {
     ustring str = "Hello World! asdf qwerty asdf";
 	EXPECT_EQ(13, str.find("asdf"));
+    EXPECT_EQ(7, str.find("orld"));
 	EXPECT_EQ(25, str.find("asdf", 14));
 }