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"""A microbenchmark for measuring performance of Side Inputs iterable.
Runs side input iterable that fetches from multiple FakeSources, and
measures the time to fetch all elements from all sources.
Run as
python -m apache_beam.tools.sideinput_microbenchmark
"""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import time
from builtins import range
from apache_beam.runners.worker import opcounters
from apache_beam.runners.worker import sideinputs
from apache_beam.runners.worker import statesampler
from apache_beam.runners.worker.sideinputs_test import FakeSource
from apache_beam.tools import utils
from apache_beam.utils.counters import CounterFactory
[docs]def long_generator(value, elements):
for _ in range(elements):
yield value
[docs]def run_benchmark(num_runs=50, input_per_source=4000, num_sources=4):
print("Number of runs:", num_runs)
print("Input size:", num_sources * input_per_source)
print("Sources:", num_sources)
times = []
for i in range(num_runs):
counter_factory = CounterFactory()
state_sampler = statesampler.StateSampler('basic', counter_factory)
state_sampler.start()
with state_sampler.scoped_state('step1', 'state'):
si_counter = opcounters.SideInputReadCounter(
counter_factory, state_sampler, 'step1', 1)
si_counter = opcounters.NoOpTransformIOCounter()
sources = [
FakeSource(long_generator(i, input_per_source))
for i in range(num_sources)]
iterator_fn = sideinputs.get_iterator_fn_for_sources(
sources, read_counter=si_counter)
start = time.time()
list(iterator_fn())
time_cost = time.time() - start
times.append(time_cost)
state_sampler.stop()
print("Runtimes:", times)
avg_runtime = sum(times) / len(times)
print("Average runtime:", avg_runtime)
print("Time per element:", avg_runtime / (input_per_source *
num_sources))
if __name__ == '__main__':
utils.check_compiled(
'apache_beam.runners.worker.opcounters')
run_benchmark()