Adam Dąbrowski dabrowski-adam

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

	# Personal Feeling: using the following jvm config is smoother than default
	# My Machine: Macbook pro M1max 64GB
	# More Info: https://github.com/FoxxMD/intellij-jvm-options-explained

	# Prerequisite (Intellij < 2022.2)
	# 1. Install JetBrain Runtime 17 osx-aarch64 for Apple Silicon, https://github.com/JetBrains/JetBrainsRuntime/releases
	# 2. Switch the runtime from JetBrain Runtime 11 to 17, https://www.jetbrains.com/help/idea/switching-boot-jdk.html


	# JetBrain Toolbox

	exists(A, list(A, _, _, _, _)).
	exists(A, list(_, A, _, _, _)).
	exists(A, list(_, _, A, _, _)).
	exists(A, list(_, _, _, A, _)).
	exists(A, list(_, _, _, _, A)).

	rightOf(R, L, list(L, R, _, _, _)).
	rightOf(R, L, list(_, L, R, _, _)).
	rightOf(R, L, list(_, _, L, R, _)).
	rightOf(R, L, list(_, _, _, L, R)).