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@jboner
jboner / latency.txt
Last active May 21, 2024 07:18
Latency Numbers Every Programmer Should Know
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
@mediabounds
mediabounds / floatsign.sh
Last active March 31, 2024 18:43
A small bash script to re-sign iOS applications.
# !/bin/bash
# Copyright (c) 2011 Float Mobile Learning
# http://www.floatlearning.com/
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
@demonbane
demonbane / makeapp.sh
Created July 5, 2011 20:05
Create a Fluid-style app launcher for single-window Chrome instances on OSX
#!/bin/sh
echo "What should the Application be called (no spaces allowed e.g. GCal)?"
read inputline
name="$inputline"
echo "What is the url (e.g. https://www.google.com/calendar/render)?"
read inputline
url="$inputline"