Plan a load test
Back3. What that would mean
One pass takes
1.533s
median of 3 past run(s)
Projected passes
1173
117.3/min
Each user does
391
passes in the window
about 1173 passes if the application keeps up at 1.5s 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.