mimi1vx

# please run: mkdir /tmp/img ; docker export $(docker create centos) | tar -C /tmp/img/ -xvf -
# before this script

import os
import ctypes

from multiprocessing import Process

CLONE_NEWUSER = 0x10000000
CLONE_NEWPID = 0x20000000

mimi1vx

function haskell_info() {
    cabal_files=(*.cabal(N))
    if [ $#cabal_files -gt 0 ]; then
        if [ -f cabal.sandbox.config ]; then
            cabal_sandbox_info
        elif [ -f stack.yaml ]; then
            stack_info
        else
            echo "%{$fg[red]%}no stack/sandbox%{$reset_color%}"
        fi

mimi1vx

Latency Comparison Numbers
--------------------------
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
Send 1K bytes over 1 Gbps network        10,000   ns    0.01 ms
Read 4K randomly from SSD*              150,000   ns    0.15 ms