seriyps

%% Prints source code of a function.
%%
%% Requires debug_info
%% Will not work for modules mocked by meck
%%
%% > io:format("~s~n", [rf:print_function(dict, new, 0)]).
%% new() ->
%%     Empty = mk_seg(16),
%%     #dict{empty = Empty, segs = {Empty}}.

paulirish

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

• elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

jaredmorrow

edit

@akash-akya pointed out in the comments that the file module supports named pipes since OTP 20. So none of this post is really needed anymore if you are on >= OTP 21.

---

Erlang and Named Pipes

The intention of this post is to provide a solution (with examples) to a somewhat uncommon issue in Erlang. I hate searching for answers to the same problems over and over, and I had a hard time finding answers to this particular problem, so I wrote it all down once I figured it out. If one day you decide to read and write data through fifo's (named pipes) and then decide you want to read or write the other end of the pipe from Erlang, this post is for you.

essen

HTTP and related specifications

This gist is deprecated in favor of https://github.com/ninenines/cowboy/blob/master/doc/src/guide/specs.asciidoc which has a formatted version at https://ninenines.eu/docs/en/cowboy/2.0/guide/specs/

HTTP

IANA Registries

• HTTP Method Registry
• HTTP Status Code Registry

id

F = fun(F, Fd) -> receive stop -> io:format(Fd, "stop~n", []), file:close(Fd), ok; Msg -> io:format(Fd, "~p~n", [Msg]), F(F, Fd) end end.
{ok, Fd} = file:open("/tmp/trace.out", [write]), Tracer = proc_lib:spawn(fun() -> F(F, Fd) end).

%% trace everything
erlang:trace(Pid, true, [all, {tracer, Tracer}]).
%% stop tracing
erlang:trace(Pid, false, [all, {tracer, Tracer}]).
Tracer ! stop.

%% match pattern

jtomschroeder

#!/bin/sh

# From http://svn.gna.org/viewcvs/*checkout*/etoile/trunk/Etoile/LiveCD/Subscripts/ubuntu-install-etoile.sh?content-type=text%2Fplain

# Date: Aug 7, 2012

# Initialize option variables with default values
BUILD_DIR=$PWD/build
PREFIX_DIR=/
ETOILE_VERSION=trunk

burke

ruby-1.9.3-p327 cumulative performance patch for rbenv

This installs a patched ruby 1.9.3-p327 with various performance improvements and a backported COW-friendly GC, all courtesy of funny-falcon.

Requirements

• rbenv
• ruby-build

You will also need a C Compiler. If you're on Linux, you probably already have one or know how to install one. On OS X, you should install XCode, and brew install autoconf using homebrew.

jeffrafter

worker_processes  1;

error_log  /usr/local/var/log/nginx.error.log;

events {
    worker_connections  1024;
}

http {
    include            mime.types;