Pandas to Polars: Why Speed Matters for Finding the Truth
You can't ignore the performance advantage of Polars anymore. Moving from Pandas' in-place mutations to Polars' declarative expressions lets you verify truth across much larger datasets.
Next 
Val Data
Data insights, analytics, and technical explorations.
I’m Dominick Ryan, a systems and IT operations engineer. I build dependable cloud foundations, automate administrative overhead through code, and profile compute, security, and lifecycle trade-offs across distributed environments. This site documents systems benchmarks, operational architectures, and technical postmortems from platforms I maintain. There are also some personal opinions and musings, which you are free to ignore, embrace, or rail against as suits you.
My Posts
PEP 686: Python Finally Kills the Windows Locale Default
Python 3.15 makes UTF-8 the default across all platforms. Legacy PowerShell 5.1 can still get in the way.
Air-Gap Your AI for Fun and Safety: When Local Models Make the Most Sense
How a hybrid workflow pairing basic Python pre-filtering with a local, air-gapped AI model turned an unmanageable 40 MB production log dump into an actionable root-cause analysis.
Interactive Projects & Tools
Live Transit & Weather
BMT Brighton Line Tracker
Real-time MTA arrival tracking, live weather commute alerts, and historical performance diagnostics for the Q and B corridor.
Launch Tracker →
Macroeconomic Modeling
Housing Market Simulation
Interactive computational model simulating regional listing volumes, inventory absorption, foreclosure rates, and market pricing.
Run Simulation →
Physics & Complexity
Boids Flocking
Observe emergent complexity through three simple steering rules: Separation, Alignment, and Cohesion in a real-time vector canvas.
Launch Simulation →My Reading List
Software Engineering arxiv.org
What You See Is What It Does: A Structural Pattern for Legible Software
Explores architectural design patterns in modern software systems that align system internals with user perception, enhancing legibility, usability, and maintainability.
Distributed Systems static.googleusercontent.com
The Google File System
Describes GFS, a scalable distributed file system designed for data-intensive applications, emphasizing fault tolerance, high throughput, and running on commodity hardware.
Distributed Systems allthingsdistributed.com
Dynamo: Amazon’s Highly Available Key-value Store
Details Dynamo, Amazon's highly available, decentralized key-value storage system utilizing consistent hashing and eventual consistency to achieve masterless replication.