jordansissel

$ test1=foo
$ set -a
$ test2=foo
$ test3=foo
$ set +a
$ env | grep test
test2=foo
test3=foo

jordansissel

Premise

I have some code that does acl checking; compares an client ip address against a list of addresses (or subnets) that permit or reject. This largely involves iterating across a set of IPAddr objects asking addr.include?(client_addr). Performance is terrible when I include this acl checking.

Why? IPAddr is really slow, so I implemented what I needed as "TubeAddress" and compared the speeds.

Data

 implementation |  platform     | duration | rate

ipaddr | rbx/ 1.8.7 | 18.96 | 2637.29

jordansissel

This DateTime#sec_fraction change is not documented as far as I can tell, at time of writing (2011/02/08).

The change is that sec_fraction in 1.8.x returns "fraction of a day" where in 1.9.x it returns "fraction of a second"

snack(~) % rvm ruby -e 'require "date"; p [RUBY_VERSION, RUBY_PLATFORM] => DateTime.now.sec_fraction.to_f' | sort           
{["1.8.6", "x86_64-linux"]=>3.69974537037037e-06}
{["1.8.7", "java"]=>5.72916666666667e-06}

{["1.8.7", "x86_64-linux"]=>2.9518287037037e-06}

jordansissel

setcap grants root-like permissions, so there's additional constraints on the binary.

It ignores LD_PRELOAD and LD_LIBRARY_PATH environment variables, so if you used these, you'll have to find another way.

One option is to use the RPATH piece of the Dynamic section of an ELF binary.

jordansissel

import Svg exposing (..)
import Svg.Attributes exposing (..)
import List

cycles = 2 
yScale = 50
lineThickness = 20

i = List.range 0 (cycles * 360)

jordansissel

public class Main {
  public static void main(String[] args) {
    X x = new X();

    Long value = 500L;

    if (args.length != 1) {
      System.out.println("Usage: Main <iterations>");
      System.exit(1);
    }

jordansissel

Asembly: https://keyboard-configurator.massdrop.com/ext/ergodox/assembly.php

Keycaps?

• http://www.wasdkeyboards.com/index.php/products/keycap-set/pbt-104-key-cherry-mx-keycap-set-gray-side-print.html
• http://www.maxkeyboard.com/max-ansi-pbt-104-key-cherry-mx-keycap-set-front-side-print.html
• https://mechanicalkeyboards.com/shop/index.php?l=product_detail&p=1336
• http://www.geekkeys.com/grey-side-printed-pbt-104-keyset/

jordansissel

node default {
  tag("deployment::$deployment")
  include truth::enforcer

  case $operatingsystem {
    "Ubuntu":  { include os::ubuntu }
    default: { err("Unsupported operatingsystem: '$operatingsystem'") }
  }

  exec {

jordansissel

% puppet apply test.pp
notice: Scope(Apache::Instance::With_port[80]): Apache instance 'my instance' on port 80
notice: Scope(Apache::Instance::With_port[8000]): Apache instance 'my instance' on port 8000

jordansissel

public class Foo {
  private static final int ITERATIONS = 10000000;
  public static void main(String[] args) {
    Foo foo = new Foo();
    int i = Integer.parseInt(args[0]);

    System.out.println(i);
    if (args[1].equals("a")) {
      System.out.println("a");