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carles san agustin carlessanagustin

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pfreixes / Gevent vs asyncio with
Last active May 16, 2021
Gevent vs asyncio with libuv
View Gevent vs asyncio with

The numbers claimed by this benchamark about Gevent [1] comparaed with the numbers got by Asyncio with the uvloop and even with the default loop has left me a bit frozen. Ive repeated a few of them : gevent, asyncio, asyncio-uvloop and go for the echo server and these are the numbers roughly:

For gevent

$ ./echo_client
685393 0.98KiB messages in 30 seconds
Latency: min 0.04ms; max 4.48ms; mean 0.126ms; std: 0.048ms (37.68%)
Latency distribution: 25% under 0.088ms; 50% under 0.122ms; 75% under 0.158ms; 90% under 0.182ms; 99% under 0.242ms; 99.99% under 0.91ms
FIELDS = ['cmd', 'command', 'start', 'end', 'delta', 'msg', 'stdout', 'stderr']
def human_log(res):
if type(res) == type(dict()):
for field in FIELDS:
if field in res.keys():
encoded_field = res[field].encode('utf-8')
print '\n{0}:\n{1}'.format(field, encoded_field)
Kartones /
Last active Feb 1, 2023
PostgreSQL command line cheatsheet


Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

  • -E: will describe the underlaying queries of the \ commands (cool for learning!)
  • -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)
lazarofl /
Last active Apr 19, 2022
MongoDB Automatic Backup to Amazon S3 with Crontab and s3cmd. Red Hat Linux on Amazon EC2
#Force file syncronization and lock writes
mongo admin --eval "printjson(db.fsyncLock())"
adrienbrault /
Created Sep 24, 2012
Script to reduce VM size before packaging for vagrant
# Credits to:
# -
# -
aptitude -y purge ri
aptitude -y purge installation-report landscape-common wireless-tools wpasupplicant ubuntu-serverguide
aptitude -y purge python-dbus libnl1 python-smartpm python-twisted-core libiw30
aptitude -y purge python-twisted-bin libdbus-glib-1-2 python-pexpect python-pycurl python-serial python-gobject python-pam python-openssl libffi5