jboner

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

andreyvit

tmux cheat sheet

(C-x means ctrl+x, M-x means alt+x)

Prefix key

The default prefix is C-b. If you (or your muscle memory) prefer C-a, you need to add this to ~/.tmux.conf:

remap prefix to Control + a

XVilka

THIS GIST WAS MOVED TO TERMSTANDARD/COLORS REPOSITORY.

PLEASE ASK YOUR QUESTIONS OR ADD ANY SUGGESTIONS AS A REPOSITORY ISSUES OR PULL REQUESTS INSTEAD!

romainl

This gist is no longer maintained.

See https://github.com/romainl/idiomatic-vimrc for an up-to-date version.

---

My Vim-related gists.

datagrok

When you cancel a Jenkins job

Unfinished draft; do not use until this notice is removed.

We were seeing some unexpected behavior in the processes that Jenkins launches when the Jenkins user clicks "cancel" on their job. Unexpected behaviors like:

• apparently stale lockfiles and pidfiles
• overlapping processes
• jobs apparently ending without performing cleanup tasks
• jobs continuing to run after being reported "aborted"

junegunn

# GIT heart FZF
# -------------

is_in_git_repo() {
  git rev-parse HEAD > /dev/null 2>&1
}

fzf-down() {
  fzf --height 50% --min-height 20 --border --bind ctrl-/:toggle-preview "$@"
}

HaleTom

#!/bin/bash

# Tom Hale, 2016. MIT Licence.
# Print out 256 colours, with each number printed in its corresponding colour
# See http://askubuntu.com/questions/821157/print-a-256-color-test-pattern-in-the-terminal/821163#821163

set -eu # Fail on errors or undeclared variables

printable_colours=256

ericbn

" Statusline (requires Powerline font)
set statusline=
set statusline+=%(%{&buflisted?bufnr('%'):''}\ \ %)
set statusline+=%< " Truncate line here
set statusline+=%f\  " File path, as typed or relative to current directory
set statusline+=%{&modified?'+\ ':''}
set statusline+=%{&readonly?'\ ':''}
set statusline+=%= " Separation point between left and right aligned items
set statusline+=\ %{&filetype!=#''?&filetype:'none'}
set statusline+=%(\ %{(&bomb\|\|&fileencoding!~#'^$\\\|utf-8'?'\ '.&fileencoding.(&bomb?'-bom':''):'')

.bashrc

##############
# pretty prompt and font colors
##############

# alter the default colors to make them a bit prettier
echo -en "\e]P0000000" #black
echo -en "\e]P1D75F5F" #darkred
echo -en "\e]P287AF5F" #darkgreen
echo -en "\e]P3D7AF87" #brown
echo -en "\e]P48787AF" #darkblue

marcan

#!/boot/bzImage

# Linux kernel userspace initialization code, translated to bash
# (Minus floppy disk handling, because seriously, it's 2017.)
# Not 100% accurate, but gives you a good idea of how kernel init works
# GPLv2, Copyright 2017 Hector Martin <marcan@marcan.st>
# Based on Linux 4.10-rc2.

# Note: pretend chroot is a builtin and affects the current process
# Note: kernel actually uses major/minor device numbers instead of device name