This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.
To capture the video (filesize: 19MB), using the free "QuickTime Player" application:
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 |
THIS GIST WAS MOVED TO TERMSTANDARD/COLORS
REPOSITORY.
PLEASE ASK YOUR QUESTIONS OR ADD ANY SUGGESTIONS AS A REPOSITORY ISSUES OR PULL REQUESTS INSTEAD!
# vim: set ft=python: | |
# see the README at https://gist.github.com/phiresky/4bfcfbbd05b3c2ed8645 | |
# source: https://github.com/mpv-player/mpv/issues/2149 | |
# source: https://github.com/mpv-player/mpv/issues/566 | |
# source: https://github.com/haasn/gentoo-conf/blob/nanodesu/home/nand/.mpv/filters/mvtools.vpy | |
import vapoursynth | |
core = vapoursynth.get_core() |
These are my notes on instaling NixOS 16.03 on a Lenovo ThinkPad X1 Carbon (4th generation) with an encrypted root file system using UEFI.
Most of this is scrambled from the following pages:
Backup: | |
docker exec -t -u postgres your-db-container pg_dumpall -c > dump_`date +%d-%m-%Y"_"%H_%M_%S`.sql | |
Restore: | |
cat your_dump.sql | docker exec -i your-db-container psql -Upostgres |
Copyright © 2016-2018 Fantasyland Institute of Learning. All rights reserved.
A function is a mapping from one set, called a domain, to another set, called the codomain. A function associates every element in the domain with exactly one element in the codomain. In Scala, both domain and codomain are types.
val square : Int => Int = x => x * x
#!/bin/bash | |
################################################################ | |
# Install a printer on Arch Linux with cups using command line # | |
# Used for a HP PSC 1510 with default driver # | |
################################################################ | |
sudo pacman -S cups | |
sudo systemctl start org.cups.cupsd |
Code is clean if it can be understood easily – by everyone on the team. Clean code can be read and enhanced by a developer other than its original author. With understandability comes readability, changeability, extensibility and maintainability.