jboner / latency.txt

Last active November 18, 2024 08:23

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

dmeliza / scalebars.py

Last active February 7, 2023 00:33

matplotlib: add scale bars to axes

	# -- coding: utf-8 --
	# -- mode: python --
	# Adapted from mpl_toolkits.axes_grid1
	# LICENSE: Python Software Foundation (http://docs.python.org/license.html)

	from matplotlib.offsetbox import AnchoredOffsetbox
	class AnchoredScaleBar(AnchoredOffsetbox):
	def __init__(self, transform, sizex=0, sizey=0, labelx=None, labely=None, loc=4,
	pad=0.1, borderpad=0.1, sep=2, prop=None, barcolor="black", barwidth=None,
	**kwargs):

gizmaa / Plot_Examples.md

Last active October 27, 2024 12:01

Various Julia plotting examples using PyPlot

Plotting

Last Update: May 13, 2019
Offline Version

	<Multi_key> <space> <a> : "α" U03B1 # GREEK SMALL LETTER ALPHA
	<Multi_key> <a> <space> : "α" U03B1 # GREEK SMALL LETTER ALPHA
	<Multi_key> <space> <b> : "β" U03B2 # GREEK SMALL LETTER BETA
	<Multi_key> <b> <space> : "β" U03B2 # GREEK SMALL LETTER BETA
	<Multi_key> <space> <c> : "ξ" U03BE # GREEK SMALL LETTER XI
	<Multi_key> <c> <space> : "ξ" U03BE # GREEK SMALL LETTER XI
	<Multi_key> <space> <d> : "δ" U03B4 # GREEK SMALL LETTER DELTA
	<Multi_key> <d> <space> : "δ" U03B4 # GREEK SMALL LETTER DELTA
	<Multi_key> <space> <e> : "ε" U03B5 # GREEK SMALL LETTER EPSILON
	<Multi_key> <e> <space> : "ε" U03B5 # GREEK SMALL LETTER EPSILON

satra / distcorr.py

Created October 16, 2014 15:40

Distance Correlation in Python

	from scipy.spatial.distance import pdist, squareform
	import numpy as np

	from numbapro import jit, float32

	def distcorr(X, Y):
	""" Compute the distance correlation function

	>>> a = [1,2,3,4,5]
	>>> b = np.array([1,2,9,4,4])

karpathy / min-char-rnn.py

Last active November 18, 2024 15:04

Minimal character-level language model with a Vanilla Recurrent Neural Network, in Python/numpy

	"""
	Minimal character-level Vanilla RNN model. Written by Andrej Karpathy (@karpathy)
	BSD License
	"""
	import numpy as np

	# data I/O
	data = open('input.txt', 'r').read() # should be simple plain text file
	chars = list(set(data))
	data_size, vocab_size = len(data), len(chars)