Tim Mastny

I’m a software engineer at Wave building financial infrastructure for developing countries. I write about low-level programming, data science, and algorithms.

More about me.

Featured Writing

• Visualizing CPU Pipelining
  • Interactive visualizations showing how CPUs execute instructions
• A* Tricks for Videogame Path Finding
  • Overview of path finding techniques with animations from my own videogame
  • See the discussion on Hacker News.
• Discrete Cosine Transform and Time Series Classification
  • Using data compression techniques to classify time series

All my posts.

Key Projects

• Dead Rise
  • a handmade, 8-bit, fantasy console shooter.
  • original soundtrack available on Spotify.
• sass
  • low-level wrapper around libsass. Helps run Shiny and RMarkdown.
  • over 900k downloads per month.
• Hudl’s Greatest Comebacks
  • an internal data analytics tool used to find exciting football games and moments, leading to the creation of numerous viral football highlight videos.
• tsrecipes
  • a collection of time series algorithms, focused on the underexplored goals of clustering and classification with techniques from data compression and signal processing.
  • extended articles are available on the package website.

All my projects.

Tools and Libraries

• browse: tool to open a local file in Github
• feat: python library to manage column features in scikit learn
• leadr: R package to manage machine learning model metadata

My github.

Latest Blog Posts

• 2025-01-31 False Sharing
• 2025-01-29 Tuning B+ Trees for Memory Performance
• 2024-12-22 Why Branch Prediction Needs Real Data
• 2024-11-30 Visualizing CPU Pipelining
• 2023-12-16 A* Tricks for Videogame Path Finding
• 2023-11-29 Debugging MIT 6.824: Distributed Systems
• 2023-01-28 How Garbage Collection works in Crafting Interpreters
• 2022-12-28 Remotely connecting to Windows 10 with an iPad
• 2021-12-01 Writing R tutorials with GPT-3
• 2021-11-07 Why I Use Gumshoe, not D&D, for Role-playing Investigations