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.
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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
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.
Distributed Systems static.googleusercontent.com
Dremel: Interactive Analysis of Web-Scale Datasets
Describes Dremel, Google's query engine for nested structured data, combining columnar storage and multi-level execution trees to run SQL queries on petabytes in seconds.
Data Analysis / Tools pandas.pydata.org
pandas (project)
The open-source project documentation and repository home for pandas, the foundational data analysis and manipulation library for the Python programming language.