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# -*- coding: utf-8 -*-
"""
Benchmarks for gevent.queue
"""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import contextlib
import perf
import greenlet
import gevent
from gevent import _tracer as monitor
N = 1000
@contextlib.contextmanager
def tracer(cls, *args):
inst = cls(*args)
try:
yield
finally:
inst.kill()
def _run(loops):
duration = 0
for _ in range(loops):
g1 = None
def switch():
parent = gevent.getcurrent().parent
for _ in range(N):
parent.switch()
g1 = gevent.Greenlet(switch)
g1.parent = gevent.getcurrent()
t1 = perf.perf_counter()
for _ in range(N):
g1.switch()
t2 = perf.perf_counter()
duration += t2 - t1
return duration
def bench_no_trace(loops):
return _run(loops)
def bench_trivial_tracer(loops):
def trivial(_event, _args):
return
greenlet.settrace(trivial)
try:
return _run(loops)
finally:
greenlet.settrace(None)
def bench_monitor_tracer(loops):
with tracer(monitor.GreenletTracer):
return _run(loops)
def bench_hub_switch_tracer(loops):
# use current as the hub, since tracer fires
# when we switch into that greenlet
with tracer(monitor.HubSwitchTracer, gevent.getcurrent(), 1):
return _run(loops)
def bench_max_switch_tracer(loops):
# use object() as the hub, since tracer fires
# when switch into something that's *not* the hub
with tracer(monitor.MaxSwitchTracer, object, 1):
return _run(loops)
def main():
runner = perf.Runner()
runner.bench_time_func(
"no tracer",
bench_no_trace,
inner_loops=N
)
runner.bench_time_func(
"trivial tracer",
bench_trivial_tracer,
inner_loops=N
)
runner.bench_time_func(
"monitor tracer",
bench_monitor_tracer,
inner_loops=N
)
runner.bench_time_func(
"max switch tracer",
bench_max_switch_tracer,
inner_loops=N
)
runner.bench_time_func(
"hub switch tracer",
bench_hub_switch_tracer,
inner_loops=N
)
if __name__ == '__main__':
main()
|
