Print open ports as they are found while scanning

[denevin]

Is possible to have masscan show open ports as they are found while the tool is running?
I'm using -oG output command and running it against internal /16 scope.
After two days of running masscan the output file was blank but display says found 90 open ports.
After third day the data was finally added to output file
Is there a way to get this data sooner without having to wait so long?