This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.
To capture the video (filesize: 19MB), using the free "QuickTime Player" application:
#!/usr/bin/python | |
# coding=utf-8 | |
# Python version of Zach Holman's "spark" | |
# https://github.com/holman/spark | |
# by Stefan van der Walt <[email protected]> | |
""" | |
USAGE: |
/** | |
Provides the ability to verify key paths at compile time. | |
If "keyPath" does not exist, a compile-time error will be generated. | |
Example: | |
// Verifies "isFinished" exists on "operation". | |
NSString *key = SQKeyPath(operation, isFinished); | |
// Verifies "isFinished" exists on self. |
// When creating shaders for Universal Render Pipeline you can you the ShaderGraph which is super AWESOME! | |
// However, if you want to author shaders in shading language you can use this teamplate as a base. | |
// Please note, this shader does not necessarily match perfomance of the built-in URP Lit shader. | |
// This shader works with URP 7.1.x and above | |
Shader "Universal Render Pipeline/Custom/Physically Based Example" | |
{ | |
Properties | |
{ | |
// Specular vs Metallic workflow | |
[HideInInspector] _WorkflowMode("WorkflowMode", Float) = 1.0 |
The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).
My take-aways are:
You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.
Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse