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@mstevenson
mstevenson / ConfigurableJointExtensions.cs
Last active April 30, 2024 08:05
Unity extension methods for computing a ConfigurableJoint.TargetRotation value from a given local or world rotation.
using UnityEngine;
public static class ConfigurableJointExtensions {
/// <summary>
/// Sets a joint's targetRotation to match a given local rotation.
/// The joint transform's local rotation must be cached on Start and passed into this method.
/// </summary>
public static void SetTargetRotationLocal (this ConfigurableJoint joint, Quaternion targetLocalRotation, Quaternion startLocalRotation)
{
if (joint.configuredInWorldSpace) {
@jboner
jboner / latency.txt
Last active May 7, 2024 19:39
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