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@hellerbarde
hellerbarde / latency.markdown
Created May 31, 2012 13:16 — forked from jboner/latency.txt
Latency numbers every programmer should know

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

@mslinn
mslinn / PaypalController.scala
Last active June 9, 2017 22:22 — forked from alpeb/Paypal.scala
Paypal IPN script for Play 2.1
package controllers
import play.api._
import libs.ws.WS
import play.api.mvc._
import com.micronautics.paypal.{TransactionProcessor, PaypalTransactions}
import java.net.URLEncoder
import concurrent.{Await, ExecutionContext}
import concurrent.duration.Duration
import java.util.concurrent.TimeUnit
@(field:Field, min:Int=1)(f: (Field, Int) => Html)
@{
(0 until math.max(if (field.indexes.isEmpty) 0 else field.indexes.max + 1, min)).map(i => f(field("[" + i + "]"),i))
}
package util
object Slug {
def apply(input:String) = slugify(input)
def slugify(input: String): String = {
import java.text.Normalizer
Normalizer.normalize(input, Normalizer.Form.NFD)
.replaceAll("[^\\w\\s-]", "") // Remove all non-word, non-space or non-dash characters
.replace('-', ' ') // Replace dashes with spaces
@andsens
andsens / debian-init.sh
Last active October 5, 2021 09:38
This is a generic init-script, easily modifiable to suit your needs. It uses quite a lot of lsb init-functions and adheres to the lsb standards.
#!/bin/sh
### BEGIN INIT INFO
# Provides: generic-prog
# Required-Start: $local_fs $remote_fs $network
# Required-Stop: $local_fs $remote_fs $network
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Generic Program
# Description: Generic Program is a generic program to do generic things with
### END INIT INFO
@chaotic3quilibrium
chaotic3quilibrium / DIY Scala Enumeration - README.txt
Last active September 13, 2020 22:20
DIY Scala Enumeration (closest possible Java Enum equivalent with guaranteed pattern matching exhaustiveness checking)
README.txt - DIY Scala Enumeration
Copyright (C) 2014-2016 Jim O'Flaherty
Overview:
Provide in Scala the closest equivalent to Java Enum
- includes decorating each declared Enum member with extended information
- guarantees pattern matching exhaustiveness checking
- this is not available with scala.Enumeration
ScalaOlio library (GPLv3) which contains more up-to-date versions of both `org.scalaolio.util.Enumeration` and `org.scalaolio.util.EnumerationDecorated`:
@davegurnell
davegurnell / anorm.scala
Last active June 5, 2024 14:26
A short guide to Anorm
/*
Overview
--------
To run a query using anorm you need to do three things:
1. Connect to the database (with or without a transaction)
2. Create an instance of `anorm.SqlQuery` using the `SQL` string interpolator
3. Call one of the methods on `SqlQuery` to actually run the query