jimjh

(gdb) bt
#0 0x0000555555555f3b in readcb ()
#1 0x00007ffff7983e32 in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#2 0x00007ffff79898f8 in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3 0x00007ffff798a33f in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#4 0x00005555555568ff in _init_event_loop ()
#5 0x0000555555556527 in proxy ()
#6 0x00005555555563f4 in main ()

jimjh

(gdb) bt
#0 0x00005555555559aa in do_accept ()
#1 0x00007ffff79898f8 in ?? () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#2 0x00007ffff798a33f in event_base_loop () from /usr/lib/x86_64-linux-gnu/libevent-2.1.so.6
#3 0x000055555555697a in _init_event_loop ()
#4 0x00005555555565a2 in proxy ()
#5 0x000055555555646f in main ()

jimjh

$ python -m memory_profiler mysql.py
Filename: mysql.py

Line #    Mem usage    Increment   Line Contents
================================================
     4   19.375 MiB   19.375 MiB   @profile
     ...
     7   19.742 MiB    0.367 MiB       connection = pymysql.connect(...)
     ...
    13   19.742 MiB    0.000 MiB       connection.close()

jimjh

#! encoding: utf-8
"""Apparently gevent doesn't switch when writing to files on disk."""
from __future__ import print_function
import gevent
from gevent import monkey
from gevent.fileobject import FileObject
monkey.patch_all()

import socket
import tempfile

jimjh

$ python late_patch.py
sleep(seconds)

Delay execution for a given number of seconds.  The argument may be
a floating point number for subsecond precision.
$ python eager_patch.py

    Put the current greenlet to sleep for at least *seconds*.

    *seconds* may be specified as an integer, or a float if fractional

jimjh

from __future__ import print_function
from gevent.monkey import patch_all

patch_all()

from time import sleep
print(sleep.__doc__)

jimjh

from __future__ import print_function
from time import sleep
from gevent.monkey import patch_all

patch_all()
print(sleep.__doc__)

jimjh

"""Usage: start `nc -l 127.0.0.1 8080`, then run this script."""
from __future__ import print_function
import socket
import time

if __name__ == '__main__':

  n1 = time.clock()
  n2 = time.time()

jimjh

def _callback(event, args):

    # switch and throw both switch the active greenlet from origin to target
    if event not in set(['switch', 'throw']):
        return

    origin, target = args

    # record last switch (time and CPU tick)
    global __last_switch_time_ms, __last_switch_cpu_tick

jimjh

# pip-tools example
requests~=2.10

# Pipfile example
[packages]
requests = '~=2.10'