anirudhjoshi’s gists

anirudhjoshi / latency.txt

Created October 20, 2012 11:41 — forked from jboner/latency.txt

Latency Numbers Every Programmer Should Know

	Latency Comparison Numbers
	--------------------------
	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
	Send 1K bytes over 1 Gbps network 10,000 ns 0.01 ms
	Read 4K randomly from SSD* 150,000 ns 0.15 ms

anirudhjoshi / angel_sim.py

Created September 14, 2011 04:32 — forked from jmillerinc/angel_sim.py

Monte Carlo simulation of the payoffs to angel investing

	#!/usr/bin/python
	#
	# Monte Carlo simulation of the payoffs to angel investing.
	#
	# Assume a pool of N different investors, each investing in D deals,
	# with a fixed time horizon and a fixed distribution of payoffs.
	# Randomly simulate each investor's total payoff, then compute the
	# mean and std dev of all IRRs in the overall pool.
	#
	# This gives an individual angel an idea of what kind of payoff &

anirudhjoshi / node-and-npm-in-30-seconds.sh

Created August 14, 2011 02:15 — forked from isaacs/node-and-npm-in-30-seconds.sh

Use one of these techniques to install node and npm without having to sudo. Discussed in more detail at http://joyeur.com/2010/12/10/installing-node-and-npm/ Note: npm >=0.3 is *safer* when using sudo.

	echo 'export PATH=$HOME/local/bin:$PATH' >> ~/.bashrc
	. ~/.bashrc
	mkdir ~/local
	mkdir ~/node-latest-install
	cd ~/node-latest-install
	curl http://nodejs.org/dist/node-latest.tar.gz \| tar xz --strip-components=1
	./configure --prefix=~/local
	make install # ok, fine, this step probably takes more than 30 seconds...
	curl http://npmjs.org/install.sh \| sh