![[Side A] SQLite's Shared In-Memory DB Disappears — and `deserialize()` Won't Save You](/_next/image?url=https%3A%2F%2Fmedia2.dev.to%2Fdynamic%2Fimage%2Fwidth%3D1200%2Cheight%3D627%2Cfit%3Dcover%2Cgravity%3Dauto%2Cformat%3Dauto%2Fhttps%253A%252F%252Fdev-to-uploads.s3.amazonaws.com%252Fuploads%252Farticles%252Fmhbwrzels1okyvl3jr22.png&w=1200&q=75)
[Side A] SQLite's Shared In-Memory DB Disappears — and `deserialize()` Won't Save You
From the Author: D-MemFS was featured in Python Weekly Issue #737 (March 19, 2026) under Interesting Projects, Tools and Libraries . Being picked up by one of the most widely-read Python newsletters confirmed that in-memory I/O bottlenecks and memory management are truly universal challenges for developers everywhere. This series is my response to that interest. 🧭 About this Series: The Two Sides of Development In Japan, I publish this series across two distinct platforms to serve different developer needs. To provide the complete picture here on Dev.to, I've brought them together as two "Sides": Side A (Practical / originally on Qiita): Focuses on the "How" . Implementation details, benchmarks, and concrete solutions for practical use cases. Side B (Philosophy / originally on Zenn): Focuses on the "Why" . The development war stories, design decisions, and how I collaborated with AI through Specification-Driven Development (SDD). Introduction I recently released D-MemFS — a pure Python
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