jvns

Ruby and Python profilers

CPU profilers

Python

• cProfile
• https://github.com/bdarnell/plop (blog post)
• https://github.com/rkern/line_profiler
• https://github.com/uber/pyflame (blog post)

vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

paulrouget

Document moved to: https://github.com/servo/servo/blob/master/HACKING_QUICKSTART.md

niun

#!/bin/sh
#
#  Read-only Root-FS for Raspian
#
#  Modified 2015 by Pascal Rosin to work on raspian-ua-netinst with
#  overlayfs integrated in Linux Kernel >= 3.18.
#
#  Originally written by Axel Heider (Copyright 2012) for Ubuntu 11.10.
#  This version can be found here:
#  https://help.ubuntu.com/community/aufsRootFileSystemOnUsbFlash#Overlayfs

datagrok

This article is now published on my website: When are circular imports fatal?

debasishg

General Background and Overview

1. Probabilistic Data Structures for Web Analytics and Data Mining : A great overview of the space of probabilistic data structures and how they are used in approximation algorithm implementation.
2. Models and Issues in Data Stream Systems
3. Philippe Flajolet’s contribution to streaming algorithms : A presentation by Jérémie Lumbroso that visits some of the hostorical perspectives and how it all began with Flajolet
4. Approximate Frequency Counts over Data Streams by Gurmeet Singh Manku & Rajeev Motwani : One of the early papers on the subject.
5. [Methods for Finding Frequent Items in Data Streams](http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.187.9800&rep=rep1&t

joyrexus

Hi:

perl -e 'print "hello world!\n"'

A simple filter:

perl -ne 'print if /REGEX/'

Filter out blank lines (in place):

onemouth

/*
 * linux 2.6.37-3.x.x x86_64, ~100 LOC
 * gcc-4.6 -O2 semtex.c && ./a.out
 * 2010 sd@fucksheep.org, salut!
 *
 * update may 2013:
 * seems like centos 2.6.32 backported the perf bug, lol.
 * jewgold to 115T6jzGrVMgQ2Nt1Wnua7Ch1EuL9WXT2g if you insist.
 */

haosdent

#!/usr/bin/env sh

origin=`curl -i http://202.116.160.166 | egrep '(Cookie)|(VIEW)' --color`
session=`echo $origin | perl -n -e '/SessionId=(\S+);/ && print $1'`
viewstate=`echo $origin | perl -n -e '/value="(\S+)"/ && print $1'`
cookie="Cookie:ASP.NET_SessionId="$session
agent="User-Agent:python/gevent-http-client-1.0a"

curl -H $cookie http://202.116.160.166/CheckCode.aspx > /tmp/test.gif

rednaxelafx

{method} 
 - klass: {other class}
 - this oop:          0x00000000bc925718
 - method holder:     'StopThread$1'
 - constants:         0x00000000bc925430 constant pool [29] for 'StopThread$1' cache=0x00000000bc925a90
 - access:            0xc1000001  public 
 - name:              'run'
 - signature:         '()V'
 - max stack:         1
 - max locals:        2