carljm

"""
SQLAlchemy, PostgreSQL (psycopg2), and autocommit

See blog post: http://oddbird.net/2014/06/14/sqlalchemy-postgres-autocommit/

"""
from contextlib import contextmanager

from sqlalchemy import create_engine, event
from sqlalchemy.orm import sessionmaker, Session as BaseSession

hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

tobyhede

 -- PostgreSQL 9.2 beta (for the new JSON datatype)
 --   You can actually use an earlier version and a TEXT type too
 -- PL/V8 http://code.google.com/p/plv8js/wiki/PLV8

 -- Inspired by 
 -- http://people.planetpostgresql.org/andrew/index.php?/archives/249-Using-PLV8-to-index-JSON.html
 -- http://ssql-pgaustin.herokuapp.com/#1

  -- JSON Types need to be mapped into corresponding PG types 
  -- 

ajdavis

import os, time, functools, types, unittest
from tornado import gen, ioloop

import asyncmongo
import asyncmongo.errors

def async_test_engine(timeout_sec=5):
    if not isinstance(timeout_sec, int) and not isinstance(timeout_sec, float):
        raise TypeError(
            "Expected int or float, got %s\n"

gwik

# Copyright 2011 10gen
# 
# Modified by Antonin Amand <antonin.amand@gmail.com> to work with gevent.
# 
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# 
#   http://www.apache.org/licenses/LICENSE-2.0
# 

ericflo

import simplejson

from django.contrib.sessions.backends.base import SessionBase, CreateError

from django_ext.redis_helper import get_redis


class SessionStore(SessionBase):
    """
    A Redis-based session store.

ericflo

import redis

from django.conf import settings
from django.core.signals import request_finished

try:
    from eventlet.corolocal import local
except ImportError:
    from threading import local