Plan a load test
Back3. What that would mean
One pass takes
4.145s
median of 8 past run(s)
Projected passes
432
43.2/min
Each user does
144
passes in the window
about 432 passes if the application keeps up at 4.1s each; fewer means it slowed down, which is the result you are looking for
This machine: 15.8 GB RAM and 4 CPU(s): ~400 MB per browser leaves room for about 12 at once.