ΙΤ
https://gatling.io/docs/current/general/simulation_setup/#meta-dsl
separatedByRampsLasting and startingFrom are both optional. If you don’t specify a ramp, the test will jump from one level to another as soon as it is finished. If you don’t specify the number of starting users the test will start at 0 concurrent user or 0 user per sec and will go to the next step right away.