user number in gatling

Hello,
how many user gatling supports?

setUp(scn.inject(atOnceUsers(???))

Thanks a lot.

That would depend on a number of things, including the spec of load injectors, kernel tuning, available bandwidth, response times (with scenarios that contain > 1 request) . But this contrived simulation ran 188336 RPS.
https://github.com/bbc/notes-on-perf-testing/blob/master/ch/gatling/benchmark.md

Frontline contains more performant Gatling libraries.

Aidy