64-bit time function takes a lot of code space

[abarnas-airly]

Hello
I am trying to optimize code size (without compiler optimization) and I noticed that 11% of my 128KB code space is taken by 64bit zephyr function converting time to ticks:

address	size (HEX)	name	size(DEC)
08006d95 l F text	000004bc	k_us_to_ticks_ceil64	1212
0800a251 l F text	000004bc	k_us_to_ticks_ceil64	1212
0800eadd l F text	000004bc	k_us_to_ticks_ceil64	1212
0800f451 l F text	000004bc	k_ticks_to_us_floor64	1212
08001405 l F text	000004b8	k_ms_to_ticks_ceil64	1208
080018bd l F text	000004b8	k_ticks_to_ms_floor64	1208
080037c1 l F text	000004b8	k_ms_to_ticks_ceil64	1208
08003c79 l F text	000004b8	k_ticks_to_ms_floor64	1208
08008755 l F text	000004b8	k_ms_to_ticks_ceil64	1208
0800c035 l F text	000004b8	k_ms_to_ticks_ceil64	1208
0800d5a5 l F text	000004b8	k_ms_to_ticks_ceil64	1208
0800ef99 l F text	000004b8	k_ticks_to_ms_floor64	1208

Is it possible to fix it using some config?

My prj.conf:

CONFIG_GPIO=y
CONFIG_SENSOR=y
CONFIG_SERIAL=y
CONFIG_LOG=y
CONFIG_NO_OPTIMIZATIONS=y
CONFIG_MAIN_STACK_SIZE=2048
CONFIG_UART_ASYNC_API=y
CONFIG_SENSOR_LOG_LEVEL_ERR=y
CONFIG_THREAD_NAME=y

[ndrs-pst]

@abarnas-airly, What about the code size of 64-bit time function when CONFIG_SIZE_OPTIMIZATIONS=y ?.
My understanding is that Zephyr doesn't currently offer a way to finely adjust optimization settings for individual code segments.

As a workaround, I've tweaked the CMakeLists.txt in my application project. This allows me to specifically override the COMPILE_FLAGS for the application source files, effectively setting them to -O0. Here’s the modification I made:

set_source_files_properties(
    ${APP_SRC_FILES}
    PROPERTIES
    COMPILE_FLAGS "-O0"
)