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@skuttruf
skuttruf / frac-diff_sk
Last active January 23, 2024 06:35
Python code for fractional differencing of pandas time series
"""
Python code for fractional differencing of pandas time series
illustrating the concepts of the article "Preserving Memory in Stationary Time Series"
by Simon Kuttruf
While this code is dedicated to the public domain for use without permission, the author disclaims any liability in connection with the use of this code.
"""
import numpy as np
import pandas as pd
@happyincent
happyincent / teamviewer.md
Last active February 1, 2024 20:22
Install TeamViewer without a connected monitor (Xubuntu 16.04 & 18.04)

Install

wget https://download.teamviewer.com/download/linux/teamviewer_amd64.deb
sudo apt update -y
sudo apt install gdebi -y
sudo gdebi teamviewer_amd64.deb

sudo teamviewer passwd PASSWORD_TO_BE_CHANGED
sudo teamviewer daemon enable
teamviewer info
@JamesMarino
JamesMarino / TouchBar
Created May 15, 2017 01:53
Disable the TouchBar
#!/bin/bash
function enableTouchBar() {
local presentationModeProperties="<dict><key>app</key><string>fullControlStrip</string><key>appWithControlStrip</key><string>fullControlStrip</string><key>fullControlStrip</key><string>app</string></dict>"
defaults delete com.apple.touchbar.agent PresentationModeGlobal
defaults write com.apple.touchbar.agent PresentationModeFnModes $presentationModeProperties
launchctl load /System/Library/LaunchAgents/com.apple.controlstrip.plist
@pwenzel
pwenzel / lamp-stack-osx-virtualhostx.md
Last active April 8, 2022 04:00
LAMP stack on OSX with Homebrew, built-in Apache, multiple PHP versions, VirtualhostX optional

This guide shows how to set up a PHP and MySQL development environment using OSX's built-in Apache, using Homebrew to install necessary components. With this strategy, you can use different versions of PHP for certain virtual hosts.

VirtualHostX is a convenient way to manage development sites, but not required.

Install PHP and MySQL with Homebrew

brew update
brew install php56
brew install php56-mcrypt
brew install mysql
@denji
denji / nginx-tuning.md
Last active May 17, 2024 04:16
NGINX tuning for best performance

Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.

@jboner
jboner / latency.txt
Last active May 17, 2024 01:05
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