garybernhardt

bench "paths", :without_gc => true, :gc_time => true do
  PATHS[0, 1000].each { |choice| Score.score(choice, "x" * 16) }
end

Output:

...!.!.!.!..............................................
filtering paths
  Before: |                       --X-----------------------                     |
  After:  |                                   ---------X-------------------------|

garybernhardt

This tool is used to compare microbenchmarks across two versions of code. It's
paranoid about nulling out timing error, so the numbers should be meaningful.
It runs the benchmarks many times, scaling the iterations up if the benchmark
is extremely short, and it nulls out its own timing overhead while doing so. It
reports results graphically with a text interface in the terminal.

You first run it with --record, which generates a JSON dotfile with runtimes
for each of your benchmarks. Then you change the code and run again with
--compare, which re-runs and generates comparison plots between your recorded
and current times. In the example output, I did a --record on the master

garybernhardt

#!/usr/bin/env bash

main() {
    if [ ! -p .test-commands ]; then
        mkfifo .test-commands
    fi

    while true; do
        cmd=$(cat .test-commands)
        if [[ $cmd == "" ]]; then

garybernhardt

failbowl:rubies(master) $ git l
*   65cc7ef  (41 seconds)  <Gary Bernhardt>   (HEAD, master) Merge branch 'activate_command_cleanup'
|\
| * f4ced72  (2 minutes)   <Gary Bernhardt>   extract variables
| * f2760be  (3 minutes)   <Gary Bernhardt>   File.join instead of string interpolation
| * 94b8df5  (5 minutes)   <Gary Bernhardt>   activate command's imperative part is in activate!
|/
*   9291243  (7 minutes)   <Gary Bernhardt>   Merge branch 'ruby_info_cleanup'
|\
| * b7cb944  (9 minutes)   <Gary Bernhardt>   indentation

garybernhardt

puts "export #{vars.map { |k, v| %{#{k}="#{v}"} }.join(" ")}"

garybernhardt

# Goal: put a non-Rails-aware Ruby library using normal `require`s in
# lib/sim. Have it transparently reloaded between requests like Rails app
# code is.
#
# The code here goes inside of your configure block in
# config/environments/development.rb. There are two parts, commented inline.

# Reload code whenever the simulator changes.
config.watchable_dirs["lib/sim"] = [:rb]
config.watchable_files << "lib/sim.rb"

garybernhardt

failbowl:~(master) $ cabal list --installed hunit
* HUnit
    Synopsis: A unit testing framework for Haskell
    Default available version: 1.2.5.2
    Installed versions: 1.2.5.2
    Homepage: http://hunit.sourceforge.net/
    License:  BSD3

failbowl:~(master) $ echo 'import HUnit' | runhaskell

garybernhardt

inbox_blobs() {
  git ls-tree -r master | grep 'INBOX' | awk '{print $3}' | sort
}

diff <(cd ../Gmail && inbox_blobs) <(inbox_blobs) | grep '<\|>' | while read marker hash; do
  echo "$marker $(git show $hash | grep -m 1 '^Subject:')"
done | sort

garybernhardt

#!/bin/bash
/usr/bin/env ruby --disable-gems <(cat <<'EOF'
puts "ruby code goes here"
EOF)

garybernhardt

$ echo '#!/bin/ls /' > foo
$ ./foo
./foo

/:
bin  boot  dev	etc  home  initrd.img  lib  lib64  lost+found  media  mnt  opt	proc  root  run  sbin  selinux	srv  sys  tmp  usr  var  vmlinuz
$ echo '#!/bin/ls / /' > foo
$ ./foo
/bin/ls: cannot access / /: No such file or directory