import os, math, times

var rs: RunningStat
var last = cpuTime()
for i in 1..2_000:
  sleep 1
  var current = cpuTime()
  push rs, current - last
  last = current

echo(repr(rs))

# [n = 2000,
# sum = 3.936999999999999,
# min = 0.0,
# max = 0.01600000000000001,
# mean = 0.001968500000000005,
# oldM = 0.001968500000000005,
# oldS = 0.05381701550000002,
# newS = 0.05381701550000002]