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

ryanflorence

import React from "react";
import {
  useRouter,
  Link
} from "@reach/router/unstable-hooks";

function Accounts() {
  let route = useRouter({
    ".": () => <div>boring Accounts</div>,
    dope: () => <div>Dope Accounts</div>

borama

#!/bin/bash

function usage {
  echo "Use ./run_ghost.sh table_name 'alter_command' [other_ghost_args]"
  exit 1
}

database="MY_DATABASE_NAME"

table=$1

borama

#!/bin/bash

# "panic button" when run in a for loop:
# exit

database="MY_DATABASE"
export_dir="/mnt/backups/my-archive"

set -e

borama

#!/bin/bash

set -e

database="MY_DATABASE"
altered_tables=0

function fatal {
  echo "FATAL: $1" >&2
  echo "Exiting now." >&2