José David Baena – Software Engineer https://josedavidbaena.com Personal website and blog where I document thoughts, ideas, and interests in software engineering, web performance, and open source technologies. en-us josedab@gmail.com (José David Baena) josedab@gmail.com (José David Baena) Sun, 26 Jul 2026 00:00:00 GMT https://josedavidbaena.com/blog/kafka-protocol-internals/02-fetch-sessions-performance Kafka Fetch Sessions: Scaling Beyond Linear Requests https://josedavidbaena.com/blog/kafka-protocol-internals/02-fetch-sessions-performance How KIP-227 replaces repeated per-partition Fetch metadata with session deltas, what state that creates, and where the optimization stops paying. Sun, 26 Jul 2026 00:00:00 GMT josedab@gmail.com (José David Baena) kafkadistributed-systemsprotocolconsumersperformance https://josedavidbaena.com/blog/kafka-protocol-internals/03-request-lifecycle Where a Kafka Request Spends Its Milliseconds https://josedavidbaena.com/blog/kafka-protocol-internals/03-request-lifecycle Trace a Kafka request through the broker's real thread and queue model, then diagnose p99 latency against a healthy baseline before changing knobs. Sun, 26 Jul 2026 00:00:00 GMT josedab@gmail.com (José David Baena) kafkadistributed-systemsperformancelatencyinternals https://josedavidbaena.com/blog/kafka-protocol-internals/06-compression-decisions Kafka Compression: Choosing a Codec With Real Workloads https://josedavidbaena.com/blog/kafka-protocol-internals/06-compression-decisions A measurement-driven guide to Kafka compression across CPU, network, storage, and latency, using real payloads instead of codec folklore. Sun, 26 Jul 2026 00:00:00 GMT josedab@gmail.com (José David Baena) kafkacompressionzstdlz4performance https://josedavidbaena.com/blog/kafka-protocol-internals/07-quotas-throttling Kafka Quotas: How Brokers Contain Noisy Neighbors https://josedavidbaena.com/blog/kafka-protocol-internals/07-quotas-throttling Kafka quotas contain noisy neighbors through versioned throttle responses, broker-side channel muting, and per-broker resource accounting. Sun, 26 Jul 2026 00:00:00 GMT josedab@gmail.com (José David Baena) kafkadistributed-systemsprotocolperformancemulti-tenant https://josedavidbaena.com/blog/mermaid-nextjs-journey/mermaid-diagrams-three-architectures-one-solution Three Architectures, One Solution: Building a Mermaid.js Diagram System https://josedavidbaena.com/blog/mermaid-nextjs-journey/mermaid-diagrams-three-architectures-one-solution Three Mermaid-in-Next.js architectures, one that shipped. Index post for a 3-part case study on build-time rendering, over-engineering, and deletion. Mon, 20 Oct 2025 00:00:00 GMT josedab@gmail.com (José David Baena) nextjsmermaidarchitectureperformancecase-studypragmatic-engineering https://josedavidbaena.com/blog/mermaid-nextjs-journey/mermaid-nextjs-part-1-build-time-rendering When Build-Time Rendering Seemed Like a Good Idea https://josedavidbaena.com/blog/mermaid-nextjs-journey/mermaid-nextjs-part-1-build-time-rendering Part 1: I optimized Mermaid rendering with build-time Puppeteer SVGs. Builds went 5s to 45s. Why I abandoned the approach and what it taught me. Fri, 03 Oct 2025 00:00:00 GMT josedab@gmail.com (José David Baena) nextjsmermaidbuild-optimizationstatic-site-generationperformanceremark-plugins