Stas Korotaev Stals

Programming Achievements: How to Level Up as a Developer

This gist is part of a blog post. Check it out at:

http://jasonrudolph.com/blog/2011/08/09/programming-achievements-how-to-level-up-as-a-developer

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

Round trip within same datacenter ...... 500,000 ns = 0.5 ms

	<!DOCTYPE html>
	<html lang="en-us">
	<head>
	<style>
	canvas {
	width: 100%;
	height: 100%;
	position: absolute;
	}
	</style>

	Shader "Custom/GreyScaleForBackPlay" {
	Properties
	{
	[PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {}
	_Color ("Tint", Color) = (1,1,1,1)
	[MaterialToggle] PixelSnap ("Pixel snap", Float) = 0
	_EffectAmount ("Effect Amount", Range (0, 1)) = 1.0
	}

	SubShader

	Shader "GrayScale" {
	Properties
	{
	[PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {}
	_Color ("Tint", Color) = (1,1,1,1)
	[MaterialToggle] PixelSnap ("Pixel snap", Float) = 0
	_EffectAmount ("Effect Amount", Range (0, 1)) = 1.0
	}

	SubShader

	using UnityEngine;
	using System.Collections;

	public class Gismo16to9 : MonoBehaviour {
	public void OnDrawGizmos()
	{
	var camSizeHeight = Camera.main.orthographicSize;
	var camSizeWidth = camSizeHeight * 16f / 9f;

	var leftUp = new Vector2(-camSizeWidth, camSizeHeight);