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?

vertexclique

MacOS

Build 3059

MD5: 59bab8f71f8c096cd3f72cd73851515d

Rename it to: Sublime Text

Make it executable with: chmod u+x Sublime\ Text

jboner

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

revolunet

#
# NB : this is not secure
# from http://code.activestate.com/recipes/266586-simple-xor-keyword-encryption/
# added base64 encoding for simple querystring :)
#

def xor_crypt_string(data, key='awesomepassword', encode=False, decode=False):
    from itertools import izip, cycle
    import base64
    if decode:

mikehaertl

""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" /etc/vim/vimrc.local V1.1.12 2019-07-30 https://gist.github.com/mikehaertl/1612035
""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
"
" A Vundle based Vim configuration with globally shared plugins on Ubuntu.
"
" This is a Vundle based Vim setup that keeps all plugins in a global
" directory, namely /etc/vim/bundle. It's trimmed towards PHP development
" with Yii.
"