Measurement Start Delay in Unfold.measure(...) Caused by getCountRate()

[dgeonkim]

Hello,

I record photon signals from an single photon counting modules (SPCMs) with a MultiHarp 150.
To get arrival times of photons and their changes as experimental sequences start, I run measurements in C1StartCTCStop mode using Unfold.measure(…).
However, I’ve noticed that the getCountRate() call and its accompanying log printout at the start of Unfold.measure() introduce roughly a 500 ms delay between the C1 trigger transition and the actual measurement.
Since the experimental sequence is supposed to begin exactly when C1 transitions, this delay makes it difficult to achieve precise timing.

Could you please let me know:

1. Is it possible that the getCountRate() log printout at the start of Unfold.measure() could delay the measurement by about 500 ms?
2. If so, is there a way to suppress that log printout when Unfold.measure() runs?

I’m using Python 3.13.2 on Windows 10 with the latest version of snAPI installed.
I’ve disabled all logLevel settings, yet when I call Unfold.measure(…) I still see the following log output at the very start:

screenshot1. logLevel setting

screenshot2. code for measure

screenshot3. log printout

Thank you!

[tpoint75]

Hello, i don't think the log takes that much time, but the execution of the getCountRate() function takes about 100ms.
What are you trying to measure? Whats your acquisition time and how much measurements you want to do?
For very short and repeated measurements its better to use a single measurement and split it with markers..