Notes
Engineering notes, published as the work happens.
Not thought leadership. Notes on problems we have actually had to solve — the measurement that changed our mind, the design that did not survive contact with production, the failure mode nobody documents.
Software · 3 minYour average latency is a story about a system nobody usesMean response time describes a request that mostly does not exist. Tail latency describes the one your customer remembers — and at scale, almost every user hits the tail eventually.Networking · 3 minNetwork convergence is not one numberA vendor datasheet quotes convergence as a single figure. In production it is a chain of four independent delays, and the one you did not tune is the one that decides your outage duration.Embedded · 3 minThe bootloader is the only code that is never allowed to be wrongEvery other component in an embedded product gets a second chance through an update. The code that performs the update does not. That asymmetry should change how it is written and reviewed.
Contact
The notes are part of the work.
They are published as the research happens, including the measurements that changed a design. If one of them is wrong, or close to a question you have, write.