vmihailenco

package main

import (
	"bytes"
	"encoding/hex"
	"flag"
	"fmt"
	"io"
	"log"
	"net"

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

hellerbarde

Latency numbers every programmer should know

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns             
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs

Read 1 MB sequentially from memory ..... 250,000 ns = 250 µs

andreadipersio

package main

import (
    "fmt"
    "log"

    "flag"

    "time"

nf

#!/bin/bash -e

echo '
PATH=$HOME/go/bin:$PATH
export GOPATH=$HOME
export CDPATH=.:$HOME/src/golang.org/x:$HOME/go/src:$HOME/src/github.com:$HOME/src/github.com/nf:$HOME/src/github.com/adg
export EDITOR=vim
' >> ~/.profile

sudo apt-get update

saelo

package main

import (
    "fmt"
    "reflect"
)

func Decorate(impl interface{}) interface{} {
                fn := reflect.ValueOf(impl)

yannhowe

# Image neeeds to have ssh-client
image: docker:git

services:
  - docker:dind

stages:
  - staging
before_script:
  - docker login -u gitlab-ci-token -p $CI_BUILD_TOKEN $CI_REGISTRY

xpzouying

This is a gist with a set of helpful performance tricks and best practices that I've found on the internet.

stvhay

Synology/wg

To avoid some bugs in wg-quick and/or iptables on my Synology:

1. I set up the wireguard device manually.
2. I used network namespaces to create an explicit tunnel namespace. I then specified DNS for this namespace only.

Credit where credit is due. I got this idea from the Wireguard website. https://www.wireguard.com/netns/#the-new-namespace-solution

jdah

call plug#begin()
Plug 'drewtempelmeyer/palenight.vim'
Plug 'vim-airline/vim-airline'
Plug 'wlangstroth/vim-racket'
Plug 'sheerun/vim-polyglot'
Plug 'rust-lang/rust.vim'
Plug 'preservim/tagbar'
Plug 'universal-ctags/ctags'
Plug 'luochen1990/rainbow'
Plug 'vim-syntastic/syntastic'