Mark Rushakoff mark-rushakoff

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mark-rushakoff / results.txt

Last active April 1, 2016 15:55

Which is faster: `a := make([]int, size); a[i] = val`, or `a := make([]int, 0, size); a = append(a, val)`?

	→ go test -bench=. -benchmem -benchtime=5s
	PASS
	BenchmarkMakeLen_Index8-4 100000000 70.7 ns/op 64 B/op 1 allocs/op
	BenchmarkMakeLen_Index16-4 100000000 90.7 ns/op 128 B/op 1 allocs/op
	BenchmarkMakeLen_Index32-4 50000000 132 ns/op 256 B/op 1 allocs/op
	BenchmarkMakeLen_Index64-4 30000000 212 ns/op 512 B/op 1 allocs/op
	BenchmarkMakeLen_Index128-4 20000000 362 ns/op 1024 B/op 1 allocs/op
	BenchmarkMakeLen_Index256-4 10000000 675 ns/op 2048 B/op 1 allocs/op
	BenchmarkMakeLen_Index512-4 5000000 1371 ns/op 4096 B/op 1 allocs/op
	BenchmarkMakeLen_Index1024-4 3000000 2573 ns/op 8192 B/op 1 allocs/op

mark-rushakoff / log.md

Created November 26, 2013 07:03

Benchmarking NATS connectivity in a CloudFoundry deployment

On nats_z2/0 (only NATS server):

$ sudo su
$ cd /var/vcap/bosh/bin
$ ./nats-server --port 12121 --user foo --pass bar

On api_z1/1 (Working CC, different AZ from NATS):

mark-rushakoff / Dockerfile

Created September 18, 2013 07:11

cf-deployer Dockerfile

	FROM ubuntu:precise
	MAINTAINER Mark Rushakoff <[email protected]>

	RUN echo "deb http://archive.ubuntu.com/ubuntu precise main universe" > /etc/apt/sources.list
	RUN apt-get update
	RUN apt-get upgrade -y

	RUN apt-get install -y build-essential libffi-dev libgdbm-dev libncurses5-dev libreadline-dev libssl-dev libyaml-dev zlib1g-dev
	RUN apt-get install -y wget

mark-rushakoff / wrapped_func_benchmark_test.go

Created August 16, 2013 22:45

Is there a difference when using `go foo()` vs. `go func() { foo() }()`? (This never finished when I ran it on my MacBook Air.)

	package wrapped_func

	// Run this benchmark with `go test -bench=.`

	import "testing"

	func BenchmarkSendItClean(b *testing.B) {
	total := b.N
	c := make(chan bool)
	for i := 0; i < total; i++ {

mark-rushakoff / leanpub_word_count.sh

Created April 5, 2013 14:58

Count words in your Leanpub book

	#!/bin/sh

	BOOK_SRC="${$1:-Book.txt}"

	cat "$BOOK_SRC" \| xargs cat \| # dump out all the files in the book
	sed 's/%%.*$//g' \| # naively strip comment delimiter to end of line
	wc -w \| # print out the word count

mark-rushakoff / find_rescue.sh

Created March 17, 2013 02:35

Finding number of particular statements in a git project

	#!/usr/bin/sh
	git grep -c rescue . \| # or whatever word it is you want
	tr ':' "\t" \| # translate grep -c delimiter to tab for sort
	sort -nr -k2 # sort Numeric, Reverse, "kolumn" 2

mark-rushakoff / bash_tar.sh

Last active December 14, 2015 02:49

Demonstration of how gzip seems to embed a timestamp

	> echo 'Hello!' > hello.txt
	> # Create 2 tarballs at right about the same time:
	> tar czf hello1.tar.gz hello.txt; tar czf hello2.tar.gz hello.txt
	> md5 * # The tarballs have the same md5
	MD5 (hello.txt) = e134ced312b3511d88943d57ccd70c83
	MD5 (hello1.tar.gz) = bfdacca1166009500d60151d73c4da7e
	MD5 (hello2.tar.gz) = bfdacca1166009500d60151d73c4da7e
	> tar czf hello1.tar.gz hello.txt; tar czf hello2.tar.gz hello.txt
	> md5 * # The tarballs have a different md5
	MD5 (hello.txt) = e134ced312b3511d88943d57ccd70c83

mark-rushakoff / io_popen_example.rb

Last active December 13, 2015 20:48

How to simultaneously print and capture the output of an external command in Ruby

mark-rushakoff / .vimrc

Created March 31, 2012 18:36

My .vimrc

	syn on
	set syn=auto

	filetype on
	filetype plugin on
	filetype indent on

	autocmd FileType haml set ts=2 shiftwidth=2
	autocmd FileType ruby set ts=2 shiftwidth=2
	autocmd FileType javascript set nocindent

mark-rushakoff / sample.js

Created March 2, 2012 21:10

Sample gist for try-jasmine

	#!/bin/sh

	BOOK_SRC="${$1:-Book.txt}"

	cat "$BOOK_SRC" \| xargs cat \| # dump out all the files in the book
	sed 's/%%.*$//g' \| # naively strip comment delimiter to end of line
	wc -w \| # print out the word count