NRF_LOG_INFO print RTT Viewer is too slow

[BEN_HB]

HI. i use SEGGER Studio and SDK 15.3.0.

I usally use printf func for debug. however as use SDK func, I need to use NRF_LOG_INFO casue SDK file use NRF_LOG_INFO for debuing.

and I search how enable and it work. but the speed of print is slow. 

i compare printf vs nrf_log_info using 

for(; ;) { printf("A\n")} and for(; ;) { NRF_LOG_INFO("A\n")}

nrf_log_info also print log, but not enough speed to check real-time.

i try to change buffer size or deferred option. it is no change.

help me what problem 

Thank you.

add) i test SDK 15.2.0 it work very well. not slow 

[Jørgen Holmefjord]

Thank you for reporting back the solution. I'm not sure why this would slow down the logging, but you can see an explanation of what happens in this post.

[BEN_HB]

Thank you!