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wangsquirrel / latency.txt

Created April 3, 2019 02:38 — forked from jboner/latency.txt

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

wangsquirrel / .vimrc

Created December 24, 2018 08:57

vimrc

	set ts=4
	set tabstop=4
	set shiftwidth=4
	set expandtab
	set autoindent
	syntax on
	set nu!
	set hlsearch
	if has("autocmd")
	au BufReadPost * if line("'\"") > 1 && line("'\"") <= line("$") \| exe "normal! g'\"" \| endif

wangsquirrel / speed_test.py

Last active April 4, 2019 03:55

test vultr speed

	#!/usr/bin/python2.7
	#pip install pyping requests
	import pyping
	import requests
	import sys
	import time
	import math

	vultr_addrs = ["fra-de-ping.vultr.com", "ams-nl-ping.vultr.com", "par-fr-ping.vultr.com",
	"lon-gb-ping.vultr.com", "sgp-ping.vultr.com", "hnd-jp-ping.vultr.com",

wangsquirrel / gist:d060aba16640cab551bdbccd1b77e768

Created August 9, 2018 10:41 — forked from rxaviers/gist:7360908

Complete list of github markdown emoji markup

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wangsquirrel / setup.sh

Last active April 1, 2025 08:44

deploy ss server from a new created vm

	#!/bin/bash
	# Usage: bash <(curl -s https://gist.githubusercontent.com/wangsquirrel/74b0425bc3ef52821b3d12a7d4abdc24/raw/4d6f0d58a1daa56ee1ded1761a2224912a3b619d/setup.sh) 6666 aaaa
	set -ex
	PORT=$1
	PASSWD=$2
	cd ~

	yum-config-manager --add-repo https://openresty.org/package/centos/openresty.repo
	yum -y install python-setuptools net-tools vim yum-utils
	echo "export PATH=/usr/local/openresty/nginx/sbin:$PATH" >> ~/.bash_profile