Best Software performance & optimization Videos
The 123 Software performance & optimization videos here were recommended by different people across different months. Choose by who it is for: 1 introductory, 56 intermediate, 10 for a general viewer, and 56 for someone who wants the harder derivation. Most of them are a talk. What they share is that one speaker finishes a claim, and the examples exist to hold that claim up. Channels you will keep seeing include CppCon, Molly Rocket, Strange Loop Conference.

CppCon 2018: G. Nishanov “Nano-coroutines to the Rescue! (Using Coroutines TS, of Course)”
Gor Nishanov's CppCon 2018 talk on using tiny C++ coroutines to hide memory latency, interleaving useful work while prefetches bring cache lines in from main memory.

Chrome vs Firefox vs Safari vs Servo WebRender
A short side-by-side recording by Jake Archibald of the same animation demo running in Chrome, Firefox, Safari and Servo WebRender nightlies on a 60Hz display.

React.js Conf 2015 - Hype!
Ryan Florence's React.js Conf 2015 talk pushes React into unusual use cases, including a demo comparing rendering in React, Ember and Angular.