256GB Mac mini' with M2 chip has fewer chips than the previous generation, so it turns out that SSD speed is slow, 512GB MacBook Pro with M2 Pro also slows down -
The M2 MacBook Air Shares the New MacBook Pro's SSD Problem
MacBook Air 2012 SSD Performance Up to 217% Faster Than MacBook Air 2011 | OSXDaily
How-To: Benchmark your Mac with these three free downloads - 9to5Mac