TANG ZhiXiong district10

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district10 / hilbert_curve.py

Created February 3, 2026 02:32 — forked from mdickinson/hilbert_curve.py

Code to create the third-order approximation to a 3d space-filling Hilbert curve

	import numpy

	def hilbert():
	"""
	Return NumPy array of shape (512, 3) containing successive coordinates
	for a third-order three-dimensional Hilbert curve.

	"""
	a,b,c=numpy.indices((8,)*3).reshape(3,-1)
	d=c[:8];r=abs(d-3>>1);g=(d^d>>1)*73;f=g[abs(d-1)&6]

district10 / concave_hulls.ipynb

Created March 9, 2023 05:14 — forked from dwyerk/concave_hulls.ipynb

concave hulls using shapely and scipy

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district10 / latency.txt

Created February 1, 2017 14:25 — 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 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

district10 / 0_reuse_code.js

Created April 14, 2016 05:08

Here are some things you can do with Gists in GistBox.

	// Use Gists to store code you would like to remember later on
	console.log(window); // log the "window" object to the console