Peter Prettenhofer pprett

## sparks.py
#!/usr/bin/python
# coding=utf-8

# Python version of Zach Holman's "spark"
# https://github.com/holman/spark
# by Stefan van der Walt <stefan@sun.ac.za>

"""
USAGE:

## index.html
<!DOCTYPE html>
<html >
  <head>
     <script type="text/javascript" src="http://mbostock.github.com/d3/d3.js"></script>
  </head>
  <body>
  <div class="example_div"></div>
    <script type="text/javascript">
var tooltip = d3.select("body")
	.append("div")

## latency.txt
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
	#!/usr/bin/python
	# coding=utf-8

	# Python version of Zach Holman's "spark"
	# https://github.com/holman/spark
	# by Stefan van der Walt <stefan@sun.ac.za>

	"""
	USAGE:
	<!DOCTYPE html>
	<html >
	<head>
	<script type="text/javascript" src="http://mbostock.github.com/d3/d3.js"></script>
	</head>
	<body>
	<div class="example_div"></div>
	<script type="text/javascript">
	var tooltip = d3.select("body")
	.append("div")
	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