With apologies, this question, although asked often, is somewhat meaningless.
The latency of any system is a function of the latency of the audio interface plus the latency implied by the sample buffer size divided by the sample rate specified in the application (see table below). So if you set the sample rate of ANY application to 44,100Hz (say) and the buffer size to 128 (say), that application will add 2.90 ms latency.
It doesn’t matter whether one is running a toy computer or the fastest supercomputer in the world!
Perhaps a better question to ask is, “Can I get up on stage, perform in real-time and do a 3 hour show, switching from one set of sounds to another on the fly, turning on/off or adjusting effects instantly and not get stressed out?”
THAT (among MANY other things) is what Gig Performer brings to the table.
Gig Performer does have a tool to let you measure the actual (as opposed to the reported) latency of your audio interface.
We know people are very interested in such things but we worry that focusing on such things just gets in the way of actually playing. Wearing my musician’s hat, my own position is, if I can play and not notice any delay or softness, that’s all that matters.