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Performance Engineering

Deep dives into system optimization, profiling, and latency hunting.

Anatomy of a Cache Miss: A Journey Through the Memory Hierarchy

From L1 to main memory and beyond — understanding why your 'fast' code might be waiting on data it already asked for.

Linux I/O: From Syscall to Disk Platter

A deep dive into the Linux I/O stack — from userspace syscalls through the VFS layer, block I/O schedulers, and down to the hardware. Covers io_uring, buffered vs direct I/O, and practical tuning strategies.

Linux eBPF for Mere Mortals

A guide to using eBPF tools for production debugging without kernel expertise.