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@aikar
aikar / EmpireCommand.java
Created June 9, 2015 02:43
Empire Minecraft's Command System
package com.empireminecraft.commands;
import com.empireminecraft.commands.annotation.CommandAlias;
import com.empireminecraft.commands.annotation.CommandPermission;
import com.empireminecraft.commands.annotation.Default;
import com.empireminecraft.commands.annotation.Subcommand;
import com.empireminecraft.config.EmpireServer;
import com.empireminecraft.config.PlayerSettingKey;
import com.empireminecraft.config.language.MiscLang;
import com.empireminecraft.data.EmpireUser;
@esamson
esamson / .gitignore
Last active April 28, 2019 14:56
systemd service file for sonatype nexus. Put this in `$HOME/.config/systemd/user/nexus.service`. Launch with `systemctl --user start nexus`.
default.target.wants/
nexus
@karussell
karussell / GridTraversal.java
Created July 10, 2014 22:38
Fast Voxel Grid Traversal Algorithm
public static void calcPoints( double y1, double x1, double y2, double x2,
PointEmitter emitter )
{
int x = (int) x1, y = (int) y1;
int endX = (int) x2, endY = (int) y2;
// deltaX and Y is how far we have to move in ray direction until we find a new cell in x or y direction
// y = u + t * v, where u=(x1,x2) and v=(stepX,stepY) is the direction vector
final double gridCellWidth = 1, gridCellHeight = 1;
@jboner
jboner / latency.txt
Last active August 1, 2025 22:01
Latency Numbers Every Programmer Should Know
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