Testing & QA — Tech News

«Переходи на Spark», говорили они. Сравнил pandas, Polars, DuckDB и PySpark на слабой машине

Сценарий знакомый: открываешь в pandas файл побольше, ноутбук задумывается, и через минуту всё падает с MemoryError. Следом обычно звучит совет: для…

Part 1 gave you a map: every PII-bearing column, tier-tagged. Part 2 armed you: HMAC for direct identifiers, tokens for what must be reversible, mas…

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This is the architecture of Shibui Finance , an MCP server that gives Claude direct SQL access to 64 years of US stock market data. About 10,000 sym…

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A few things I noticed. None of them alarming on their own. Our database doubles in size every year. Not "grows a lot" — doubles . Of its 180 GB, fi…

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The problem Backlink data is a $1.5B/year SaaS category. Ahrefs is $129/month, SEMrush is $140/month, Moz is $99/month. As an indie I needed competi…

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At the beginning of 2025, DeepSeek changed the conversation around AI infrastructure. Most people focused on the model quality, the training cost, a…

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Introduction - SQL without a Server Pandas is widely used for data analysis and almost every data analyst or even data engineers utilize it for fast…

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We were burning $42,000 a month on managed PostgreSQL 17 instances to power our analytics dashboards, with p99 query latency hitting 11 seconds for…

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The Conventional Wisdom Open any data-engineering thread in 2026 and you'll see the same chorus: "DuckDB is the SQLite of analytics, just use it." M…

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