Custom Virtual Thread Schedulers, CPU Cache Optimization and Work Stealing
From airhacks.fm podcast with adam bien by Adam Bien
February 15, 2026 · 1h 14m · Episode 384
About this episode
The episode features a discussion on advanced programming techniques and optimizations with Francesco Nigro.
An airhacks.fm conversation with Francesco Nigro ( @forked_franz ) about: break dancing and basketball including meeting Kobe Bryant in Italy during a dunk competition, using AI coding assistants like Claude Opus 4.5 and GitHub bots for infrastructure setup and CI/CD pipeline configuration, limitations of LLMs for novel performance-sensitive algorithmic work where training data is scarce, branchless IPv4 parsing optimization as a Christmas coding challenge, CPU branch misprediction costs when parsing variable-length IP address octets, converting branching logic into mathematical operations using bit tricks for better CPU pipeline utilization, LLMs excelling at generating enterprise code based on well-documented standards and conventions, providing minimal but precise documentation and annotations to improve LLM code generation quality, the Boundary Control Entity BCE architecture pattern and standards-based development, the core problem of thread handoff between event loops and ForkJoinPool worker threads in frameworks like quarkus Vert.x and Micronaut , mechanical sympathy implications of cross-core memory access when serialized data is allocated on one core and read by another…
People in this episode
Host: Adam Bien
Guest: Francesco Nigro
Topics covered
- virtual thread scheduling
- CPU optimization
- AI coding assistants
- performance-sensitive algorithms
- IPv4 parsing
- event loop management
- cache coherency
Keywords
- virtual threads
- CPU cache
- AI coding
- branchless parsing
- event loops
- ForkJoinPool
- BCE architecture
Mentioned in this episode
Organizations: GitHub, quarkus, Vert.x, Micronaut, netty-virtual-thread-scheduler
Products: Claude Opus 4.5
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