diff --git a/configs/arch/armv7/cortex-m4/tools-cfg.cmake b/configs/arch/armv7/cortex-m4/tools-cfg.cmake
index f2f55c4..7478fc2 100644
--- a/configs/arch/armv7/cortex-m4/tools-cfg.cmake
+++ b/configs/arch/armv7/cortex-m4/tools-cfg.cmake
@@ -73,11 +73,18 @@ endif()
 # ==============================================================================
 #                         CMake Configuration
 # ==============================================================================
+if(CMAKE_BUILD_TYPE STREQUAL "Debug")
+    set(OPTIMIZATION_FLAGS "-Og" CACHE STRING "Optimization flags" FORCE)
+elseif(CMAKE_BUILD_TYPE STREQUAL "Release" OR CMAKE_BUILD_TYPE STREQUAL "RelWithDebInfo")
+    set(OPTIMIZATION_FLAGS "-O2" CACHE STRING "Optimization flags" FORCE)
+else()
+    set(OPTIMIZATION_FLAGS "-O2" CACHE STRING "Optimization flags" FORCE)
+endif()
 set(DMOD_ARCH "armv7-cortex-m4" CACHE STRING "Target architecture")
 set(DMOD_CPU "cortex-m4" CACHE STRING "Target CPU")
 set(COMMON_DEFINE_FLAGS "-DDMOD_ARCH=\\\"${DMOD_ARCH}\\\" -DDMOD_CPU=\\\"${DMOD_CPU}\\\"")
 set(FPU_FLAGS "-mfpu=fpv4-sp-d16 -mfloat-abi=hard" CACHE STRING "FPU configuration flags")
-set(CPUCONFIG_CFLAGS "-mcpu=cortex-m4 -mthumb -mno-unaligned-access -DGCC_ARMCM4 ${COMMON_DEFINE_FLAGS} -mpic-data-is-text-relative -mabi=aapcs ${FPU_FLAGS}" CACHE STRING "C compiler flags")
+set(CPUCONFIG_CFLAGS "-fno-builtin-memset-mcpu=cortex-m4 -mthumb -mno-unaligned-access -DGCC_ARMCM4 ${COMMON_DEFINE_FLAGS} -mpic-data-is-text-relative -mabi=aapcs ${FPU_FLAGS}" CACHE STRING "C compiler flags")
 set(CPUCONFIG_CXXFLAGS "-mcpu=cortex-m4 -mthumb -mno-unaligned-access -DGCC_ARMCM4 ${COMMON_DEFINE_FLAGS} -mpic-data-is-text-relative -mabi=aapcs ${FPU_FLAGS}" CACHE STRING "C++ compiler flags")
 set(CPUCONFIG_ASMFLAGS "-mcpu=cortex-m4 -mthumb -mno-unaligned-access -DGCC_ARMCM4 ${COMMON_DEFINE_FLAGS} -mpic-data-is-text-relative -mabi=aapcs ${FPU_FLAGS}" CACHE STRING "ASM compiler flags")
 set(CPUCONFIG_LDFLAGS "-mcpu=cortex-m4 -mthumb -mno-unaligned-access -Wl,--gc-sections -Wl,-static -mabi=aapcs ${FPU_FLAGS}" CACHE STRING "Linker flags")
@@ -92,10 +99,10 @@ set(CMAKE_GDB "${ARM_GDB}" CACHE STRING "GDB")
 set(MAKE make CACHE STRING "Make")
 set(MKDIR mkdir CACHE STRING "Mkdir")
 set(RM rm CACHE STRING "Rm")
-set(CMAKE_C_FLAGS "-Wall -std=c11 ${CPUCONFIG_CFLAGS}" CACHE STRING "C compiler flags")
-set(CMAKE_CXX_FLAGS "-Wall -std=c++17 ${CPUCONFIG_CXXFLAGS}" CACHE STRING "C++ compiler flags")
-set(CMAKE_ASM_FLAGS "${CPUCONFIG_ASMFLAGS}" CACHE STRING "ASM compiler flags")
-set(CMAKE_ASM_FLAGS_DEBUG "${CPUCONFIG_ASMFLAGS} -g" CACHE STRING "ASM compiler flags for Debug")
+set(CMAKE_C_FLAGS "${OPTIMIZATION_FLAGS} -Wall -std=c11 ${CPUCONFIG_CFLAGS}" CACHE STRING "C compiler flags")
+set(CMAKE_CXX_FLAGS "${OPTIMIZATION_FLAGS} -Wall -std=c++17 ${CPUCONFIG_CXXFLAGS}" CACHE STRING "C++ compiler flags")
+set(CMAKE_ASM_FLAGS "${OPTIMIZATION_FLAGS} ${CPUCONFIG_ASMFLAGS}" CACHE STRING "ASM compiler flags")
+set(CMAKE_ASM_FLAGS_DEBUG "${OPTIMIZATION_FLAGS} ${CPUCONFIG_ASMFLAGS} -g" CACHE STRING "ASM compiler flags for Debug")
 set(CMAKE_EXE_LINKER_FLAGS "${CPUCONFIG_LDFLAGS}" CACHE STRING "Linker flags")
 
 set(CMAKE_TRY_COMPILE_TARGET_TYPE "STATIC_LIBRARY" CACHE STRING "Try compile target type")
\ No newline at end of file
diff --git a/configs/arch/armv7/cortex-m7/tools-cfg.cmake b/configs/arch/armv7/cortex-m7/tools-cfg.cmake
index b92108a..bec8014 100644
--- a/configs/arch/armv7/cortex-m7/tools-cfg.cmake
+++ b/configs/arch/armv7/cortex-m7/tools-cfg.cmake
@@ -73,11 +73,19 @@ endif()
 # ==============================================================================
 #                         CMake Configuration
 # ==============================================================================
+if(CMAKE_BUILD_TYPE STREQUAL "Debug")
+    set(OPTIMIZATION_FLAGS "-Og" CACHE STRING "Optimization flags" FORCE)
+elseif(CMAKE_BUILD_TYPE STREQUAL "Release" OR CMAKE_BUILD_TYPE STREQUAL "RelWithDebInfo")
+    set(OPTIMIZATION_FLAGS "-O2" CACHE STRING "Optimization flags" FORCE)
+else()
+    set(OPTIMIZATION_FLAGS "-O2" CACHE STRING "Optimization flags" FORCE)
+endif()
+
 set(DMOD_ARCH "armv7-cortex-m7" CACHE STRING "Target architecture")
 set(DMOD_CPU "cortex-m7" CACHE STRING "Target CPU")
 set(COMMON_DEFINE_FLAGS "-DDMOD_ARCH=\\\"${DMOD_ARCH}\\\" -DDMOD_CPU=\\\"${DMOD_CPU}\\\"")
 set(FPU_FLAGS "-mfpu=fpv5-sp-d16 -mfloat-abi=hard" CACHE STRING "FPU configuration flags")
-set(CPUCONFIG_CFLAGS "-mcpu=cortex-m7 -mthumb -mno-unaligned-access -DGCC_ARMCM7 ${COMMON_DEFINE_FLAGS} -mpic-data-is-text-relative -mabi=aapcs ${FPU_FLAGS}" CACHE STRING "C compiler flags")
+set(CPUCONFIG_CFLAGS "-fno-builtin-memset -mcpu=cortex-m7 -mthumb -mno-unaligned-access -DGCC_ARMCM7 ${COMMON_DEFINE_FLAGS} -mpic-data-is-text-relative -mabi=aapcs ${FPU_FLAGS}" CACHE STRING "C compiler flags")
 set(CPUCONFIG_CXXFLAGS "-mcpu=cortex-m7 -mthumb -mno-unaligned-access -DGCC_ARMCM7 ${COMMON_DEFINE_FLAGS} -mpic-data-is-text-relative -mabi=aapcs ${FPU_FLAGS}" CACHE STRING "C++ compiler flags")
 set(CPUCONFIG_ASMFLAGS "-mcpu=cortex-m7 -mthumb -mno-unaligned-access -DGCC_ARMCM7 ${COMMON_DEFINE_FLAGS} -mpic-data-is-text-relative -mabi=aapcs ${FPU_FLAGS}" CACHE STRING "ASM compiler flags")
 set(CPUCONFIG_LDFLAGS "-mcpu=cortex-m7 -mthumb -mno-unaligned-access -Wl,--gc-sections -Wl,-static -mabi=aapcs ${FPU_FLAGS}" CACHE STRING "Linker flags")
@@ -92,10 +100,18 @@ set(CMAKE_GDB "${ARM_GDB}" CACHE STRING "GDB")
 set(MAKE make CACHE STRING "Make")
 set(MKDIR mkdir CACHE STRING "Mkdir")
 set(RM rm CACHE STRING "Rm")
-set(CMAKE_C_FLAGS "-Wall -std=c11 ${CPUCONFIG_CFLAGS}" CACHE STRING "C compiler flags")
-set(CMAKE_CXX_FLAGS "-Wall -std=c++17 ${CPUCONFIG_CXXFLAGS}" CACHE STRING "C++ compiler flags")
-set(CMAKE_ASM_FLAGS "${CPUCONFIG_ASMFLAGS}" CACHE STRING "ASM compiler flags")
-set(CMAKE_ASM_FLAGS_DEBUG "${CPUCONFIG_ASMFLAGS} -g" CACHE STRING "ASM compiler flags for Debug")
+set(CMAKE_C_FLAGS "${OPTIMIZATION_FLAGS} -Wall -std=c11 ${CPUCONFIG_CFLAGS}" CACHE STRING "C compiler flags")
+set(CMAKE_C_FLAGS_DEBUG "-Og -g" CACHE STRING "Flags used by the C compiler during DEBUG builds." FORCE)
+set(CMAKE_C_FLAGS_RELEASE "-O2 -DNDEBUG" CACHE STRING "Flags used by the C compiler during RELEASE builds." FORCE)
+set(CMAKE_C_FLAGS_RELWITHDEBINFO "-O2 -g -DNDEBUG" CACHE STRING "Flags used by the C compiler during RELWITHDEBINFO builds." FORCE)
+set(CMAKE_CXX_FLAGS "${OPTIMIZATION_FLAGS} -Wall -std=c++17 ${CPUCONFIG_CXXFLAGS}" CACHE STRING "C++ compiler flags")
+set(CMAKE_CXX_FLAGS_DEBUG "-Og -g" CACHE STRING "Flags used by the CXX compiler during DEBUG builds." FORCE)
+set(CMAKE_CXX_FLAGS_RELEASE "-O2 -DNDEBUG" CACHE STRING "Flags used by the CXX compiler during RELEASE builds." FORCE)
+set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O2 -g -DNDEBUG" CACHE STRING "Flags used by the CXX compiler during RELWITHDEBINFO builds." FORCE)
+set(CMAKE_ASM_FLAGS "${OPTIMIZATION_FLAGS} ${CPUCONFIG_ASMFLAGS}" CACHE STRING "ASM compiler flags")
+set(CMAKE_ASM_FLAGS_DEBUG "${CPUCONFIG_ASMFLAGS} -Og -g" CACHE STRING "ASM compiler flags for Debug" FORCE)
+set(CMAKE_ASM_FLAGS_RELEASE "${CPUCONFIG_ASMFLAGS} -O2" CACHE STRING "ASM compiler flags for Release" FORCE)
+set(CMAKE_ASM_FLAGS_RELWITHDEBINFO "${CPUCONFIG_ASMFLAGS} -O2 -g" CACHE STRING "ASM compiler flags for RelWithDebInfo" FORCE)
 set(CMAKE_EXE_LINKER_FLAGS "${CPUCONFIG_LDFLAGS}" CACHE STRING "Linker flags")
 
 set(CMAKE_TRY_COMPILE_TARGET_TYPE "STATIC_LIBRARY" CACHE STRING "Try compile target type")
\ No newline at end of file
diff --git a/src/module/string.c b/src/module/string.c
index 47b3908..cd46530 100644
--- a/src/module/string.c
+++ b/src/module/string.c
@@ -9,6 +9,9 @@
 
 #include <stddef.h>
 
+#pragma GCC push_options
+#pragma GCC optimize ("no-tree-loop-distribute-patterns")
+
 /**
  * @brief Set memory to a specified value
  */
@@ -338,3 +341,5 @@ char *__strcat_chk(char *dest, const char *src, size_t destlen)
     (void)destlen;
     return strcat(dest, src);
 }
+
+#pragma GCC pop_options
\ No newline at end of file