robertobarreda

### 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

robertobarreda

import re
 
USER_AGENT_REGEX = re.compile(
  r"android|avantgo|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|"
  r"ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|opera m(ob|in)i|palm( os)?|"
  r"phone|p(ixi|re)\\/|plucker|pocket|psp|symbian|treo|up\\.(browser|link)|"
  r"vodafone|wap|indows (ce|phone)|xda|xiino", re.M)
 
def is_mobile(request):
  ua = request.META.get('HTTP_USER_AGENT', '').lower()

robertobarreda

#!/usr/bin/env python

"""
Fixes a MySQL dump made with the right format so it can be
imported to a Redshift database.

Dump using:
mysqldump --compatible=postgresql --default-character-set=utf8 -r databasename.mysql -u root databasename tablename

"""

robertobarreda

#!/usr/bin/env python
import argparse
import csv
import gzip
import sys
import re
from contextlib import closing
# This prevents prematurely closed pipes from raising
# an exception in Python
from signal import signal, SIGPIPE, SIG_DFL

robertobarreda

/* crc64.c -- compute CRC-64
 * Copyright (C) 2013 Mark Adler
 * Version 1.4  16 Dec 2013  Mark Adler
 */

/*
  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the author be held liable for any damages
  arising from the use of this software.

robertobarreda

#!/usr/bin/python
"""
Copyright 2013 matt.proud@gmail.com  (Matt T. Proud)
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
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

robertobarreda

from __future__ import division

from xxhash import xxh32
import numpy as np

DTYPE = np.int64


class CountMinSketch(object):

robertobarreda

from __future__ import print_function

from random import choice
from bintrees import FastRBTree as RBTree
import pyudorandom
from itertools import chain

class Centroid(object):

    def __init__(self, mean, count):

robertobarreda

Vagrant.configure("2") do |config|
  config.vm.box = "debian/buster64"
  # config.vm.synced_folder ".", "/vagrant", disabled: true

  config.vm.provider "virtualbox" do |vb|
    vb.memory = "256"
  end

  config.vm.define :proxy, primary: true do |proxy|
    proxy.vm.hostname = "proxy"

robertobarreda

# -*- mode: ruby -*-
# vi: set ft=ruby :

Vagrant.configure("2") do |config|
  config.vm.box = "debian/buster64"
  config.vm.network "forwarded_port", guest: 9090, host: 9090
  # config.vm.synced_folder ".", "/vagrant", disabled: true
  config.vm.provider "virtualbox" do |vb|
    vb.memory = "256"
  end