SSD affect on processing speed

Just a real quick question that I couldn’t seem to find a solid answer on. Does an SSD affect processing speed much (if at all) or does all the data just get loaded to memory until it’s done?

I haven’t done any detailed tests, but I have switched from a medium/medium high IO disk in my virtualized situation to a low IO disk without any performance hit. Unfortunately, I don’t know what those low vs. medium classifications mean, so your mileage may vary.


It does help a little bit to have an SSD. We read/write a lot of data during processing. I don’t have actual benchmarks that show statistics however.