fix: one thread means one
With workers on macOS, --threads 1 still used 6 I/O threads. Now --threads caps both counts, and 1 runs everything on one thread.
Parent5dfed6e
1 file changed+6-6
StackedSplit
With workers on macOS, --threads 1 still used 6 I/O threads. Now --threads caps both counts, and 1 runs everything on one thread.