Hi! When doing a 1000 times SHUFFLE reality check, Zorro read .fac and .par files every time. It cost a lot of time. Since the .par/.par files are the same. Is there a way to make Zorro read these two files only once?

If it's WFO, they must be read every time. If not, they could theoretically only be read once, but this would normally not save any time. The delay by parameter reading is negligible within a backtest run.