Testing a Single-Node, Single Threaded, Distributed System Written in 1985 By Will Wilson 

00:03 Testing distributed systems is complex due to asynchronous communication and multiple computers. 02:39 Testing a Single-Node, Single Threaded, Distributed System 06:44 Testing for unknown unknowns is crucial for robust systems 08:41 Cost of solving bugs increases over time 12:42 Effectively testing a system requires comprehensive exploration of its state space. 14:42 Testing a distributed system can be challenging due to the difficulty in replicating bugs found by users. 18:37 Focusing testing energy on key points can significantly speed up algorithm performance. 20:38 Using Mario's x-coordinate as a guidepost for progress in the game. 24:03 Testing distributed systems often requires considering higher dimensions than initially anticipated. 25:55 Exploring incomparable and unique situations to find bugs in distributed systems. 29:39 Challenges in Branch Execution Order 31:46 Testing a single-node distributed system in 1985 revealed issues with random number generation. 35:22 Applying a mask with low probability makes random distributions more realistic. 37:15 Improving random number distributions for more natural movement and beating levels in old video games. 40:56 Developed a deterministic hypervisor for running software consistently. 43:05 Accessing the program via email subject line.

This video condenses 100s of arcane PhD research papers into a clear, concise, and entertaining 45-minute presentation any high schooler could understand. Unbelievable!

This was mind blowing presentation.

My favorite deterministic simulator is Factorio (tbf I haven't tried TB). A deterministic hypervisor is dope!

yes but can i test a sum function with this thing? lol

The talk defines two terms: Strategy and Tactics. Strategy is the datum you choose to optimize for as the fuzzer randomly walks the states of the system. E.g. optimize to maximize Mario's X value, or optimize for reaching all tile positions etc. Tactics is the choice of input distribution.

The theme song really slaps!

This was awesome! Thank you for sharing.

Great presentation!

Node js?