import statistics
import time

LOOPS = 1024
LOOPS = 3

def format_ns(ns):
  if ns > 1000_000:
      return f"{ns / 1000_000:.1f} ms"
  if ns > 1000:
      return f"{ns / 1000:.1f} us"
  else:
      return f"{ns} ns"

def stats(timings):
  mean = statistics.mean(timings)
  std_dev = statistics.stdev(timings)
  mean = format_ns(mean)
  std_dev = format_ns(std_dev)
  print(f"Mean +- std dev: {mean} +- {std_dev} ({len(timings)} values)")

sleep = time.sleep
clock = time.perf_counter_ns

timings = []
deadline = time.monotonic() + 5.0
print("time.sleep(1e-10) benchmark...")
while True:
  t0 = clock()
  sleep(1e-10)
  t1 = clock()
  timings.append(t1 - t0)
  if time.monotonic() >= deadline:
    break

stats(timings)