https://devzone.nordicsemi.com/f/nordic-q-a/62773/fpu-fft-nrf52840-measure-elapsed-timeHi, I would like to measure the elapsed time difference between using FPU and not using FPU in my app (nRF52840). I&#39;m thinking to use the FPU FFT as the base example. So I enable some sort of timer and measure the ticks elapsed before and after callingen-USTelligent Community 13Fri, 19 Jun 2020 13:30:06 GMThttps://devzone.nordicsemi.com/thread/255983?ContentTypeID=1Fri, 19 Jun 2020 13:30:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a4e883f0-5d8f-4eec-95e9-843b5ac21fffJ&#248;rgen Holmefjord<p>Hi,</p> <p>1. NRF_LOG supports timestamping log messages. If the resolution of this is sufficient for you or not depends on how long the FPU/FFT operations will take. <a href="https://devzone.nordicsemi.com/f/nordic-q-a/23662/how-to-add-timestamp-in-rtt-viewer-using-nrf-log-module">This post</a> shows a possible solution for using RTC. It will probably be much easier to use GPIO toggling and using a logic analyzer to measure the time between the GPIO toggles. This is what we typically use for time-measurements.</p> <p>2. I believe this should be sufficient, yes.</p> <p>Best regards,<br />Jørgen</p><div style="clear:both;"></div>