mashingan

import winim

proc quit(value: DWORD) =
  quit value.int

proc refreshDirectory(handle: var HANDLE) =
  handle = FindFirstChangeNotification(".", false,
    FILE_NOTIFY_CHANGE_FILE_NAME)
  if handle == INVALID_HANDLE_VALUE:
    quit GetLastError()

gbbr

package main

import (
	"fmt"
	"log"
	"net/http"
)

func init() {
	log.SetFlags(log.Lshortfile)

solisoft

require "kemal"
require "jwt"
require "json"
require "yaml"
require "arangocr"
require "redis"

# Load .env file
env_data = YAML.parse File.read(".env.yml") rescue Hash(String, String).new
env_data.each { |k, v| ENV[k.to_s] = v.to_s }

exAspArk

# Install https://www.vaultproject.io/
brew install vault

# Start dev vault server in a separate terminal
vault server -dev
# ==> Vault server configuration:
# ...
# Unseal Key: 7ACQHhLZY5ivzNzhMruX9kSa+VXCah3y87hl3dPSWFk=
# Root Token: 858a6658-682e-345a-e4c4-a6e14e6f7853

valyala

Optimizing postgresql table for more than 100K inserts per second

• Create UNLOGGED table. This reduces the amount of data written to persistent storage by up to 2x.
• Set WITH (autovacuum_enabled=false) on the table. This saves CPU time and IO bandwidth on useless vacuuming of the table (since we never DELETE or UPDATE the table).
• Insert rows with COPY FROM STDIN. This is the fastest possible approach to insert rows into table.
• Minimize the number of indexes in the table, since they slow down inserts. Usually an index on time timestamp with time zone is enough.
• Add synchronous_commit = off to postgresql.conf.
• Use table inheritance for fast removal of old data:

JayGoldberg

package main

import (
	"fmt"
	"strconv"
)
import "strings"

func is_ipv4(host string) bool {
	parts := strings.Split(host, ".")

Gazler

sysctl -w fs.file-max=12000500
sysctl -w fs.nr_open=20000500
ulimit -n 4000000
sysctl -w net.ipv4.tcp_mem='10000000 10000000 10000000'
sysctl -w net.ipv4.tcp_rmem='1024 4096 16384'
sysctl -w net.ipv4.tcp_wmem='1024 4096 16384'
sysctl -w net.core.rmem_max=16384
sysctl -w net.core.wmem_max=16384
wget http://packages.erlang-solutions.com/erlang-solutions_1.0_all.deb
sudo dpkg -i erlang-solutions_1.0_all.deb

novalagung

package main

import (
	"fmt"
	"io"
	"os"
)

var path = "/Users/novalagung/Documents/temp/test.txt"

bcardiff

Experiment for wkhtmltopdf

brew install wkhtmltopdf
crystal wkhtmltopdf.cr

known issue: althout conversion succeeds the wkhtmltopdf process seems to hanging in the very end :-(

magnetikonline

NSSM cheatsheat

See: NSSM - the Non-Sucking Service Manager

• Create a new service
• List parameters for a service
• Set a parameter for a service
• Parameter list

Create a new service