Thanks mikaelh... Is there anything similar to Sunny's original gensieveroundlimitms as a fallback to limit the total time spent on a round?
Technically Sunny's gensieveroundlimitms does not limit the total round time. It only limits the sieving part.
With my release you can use sievepercentage to adjust the sieving time. Then you can use roundsievepercentage to adjust the total round time based on the sieving time. There's no option for a hard cap in milliseconds since I don't see any point in it and the code runs faster if I don't impose such hard caps.