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Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

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#!/usr/bin/env python
#
# Simple script showing how to read a mitmproxy dump file
#

### UPD: this feature is now avaiable in mitmproxy: https://github.com/mitmproxy/mitmproxy/pull/619

from libmproxy import flow
import json, sys

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#!/usr/bin/env python

import binascii, sys, json
import version, tnetstring, flow
from datetime import datetime


def create_har(flows):
    return {
        "log":{

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import time

def RateLimited(maxPerSecond):
    minInterval = 1.0 / float(maxPerSecond)
    def decorate(func):
        lastTimeCalled = [0.0]
        def rateLimitedFunction(*args,**kargs):
            elapsed = time.clock() - lastTimeCalled[0]
            leftToWait = minInterval - elapsed
            if leftToWait>0:

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#!/usr/bin/env bash
# SOURCE: https://eligiblestore.com/blog/2017/05/02/how-to-install-mosh-on-centos/

# ensure running as root
if [[ "$(id -u)" != "0" ]]; then
  exec sudo "$0" "$@"
fi

# install mosh
yum install -y epel-release

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sudo docker-compose ps | grep Up | awk '{print $1}' | tr "\\n" " " | xargs --no-run-if-empty sudo docker stats

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var page = require('webpage').create();

page.open('http://www.website.com/', function (status) {
  if (status === 'success') {
    captureAjaxResponsesToConsole();
  }
});

function captureAjaxResponsesToConsole() {
  // logs ajax response contents to console so sublime's onConsoleMessage can use the contents

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Common Options

-#, --progress-bar Make curl display a simple progress bar instead of the more informational standard meter.

-b, --cookie <name=data> Supply cookie with request. If no =, then specifies the cookie file to use (see -c).

-c, --cookie-jar <file name> File to save response cookies to.

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# create sdk folder
export ANDROID_HOME=/opt/android-sdk-linux
sudo mkdir -p $ANDROID_HOME

# install openjdk
sudo apt-get install openjdk-8-jdk

# download android sdk
cd $ANDROID_HOME
sudo wget https://dl.google.com/android/repository/tools_r25.2.3-linux.zip

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How to make a Release Android App debuggable

Let's say you want to access the application shared preferences in /data/data/com.mypackage.
You could try to run adb shell and then run-as com.mypackage ( or adb shell run-as com.mypackge ls /data/data/com.mypackage/shared_prefs), but on a production release app downloaded from an app store you're most likely to see:

run-as: Package 'com.mypackage' is not debuggable