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微信公众号: Python量化交易实战

sgillies / benchmark.py

Last active February 7, 2019 01:02

GeoJSON: json vs msgpack vs shapely.wkb vs geobuf

	# Comparing serialization of complex GeoJSON geometries using:
	#
	# - standard lib json, marshal, pickle, cPickle
	# - umsgpack
	# - shapely.wkb
	# - geobuf (protobuf)
	#
	# The test case is a nearly circular polygon with 128 vertices.
	#
	# Python 2.7 because geobuf isn't possible on Python 3 (because

justinfx / enc_dec_test.py

Last active October 16, 2022 13:28

Speed test of common serializers on python 2.7.2 (pickle, cPickle, ujson, cjson, simplejson, json, yajl, msgpack)

	"""
	Dependencies:
	pip install tabulate simplejson ujson yajl msgpack
	"""

	from timeit import timeit
	from tabulate import tabulate

	setup = '''d = {
	'words': """

jboner / latency.txt

Last active March 21, 2026 15:20

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

tinogomes / start_stop_memcached_script.sh

Created June 21, 2010 17:34

Script sample to start/stop for linux with nohup