Rob O'Callaghan
Creator of the RR record-and-replay debugger and co-founder of Pernosco; experienced systems engineer who worked on making time-travel debugging practical for Firefox and broader tooling.
Best podcasts with Rob O'Callaghan
Ranked by the Snipd community
Feb 25, 2026 • 52min
How rr Became a Protected Species: A Story of Necessary Hacks
Rob O'Callaghan, creator of the rr record-and-replay debugger and co-founder of Pernosco, is a systems engineer who made time-travel debugging practical. He recounts building rr with pragmatic hacks, patching syscalls and courting the kernel to keep rr safe. Talks include why browsers needed record-and-replay, Pernosco's data-flow visualizations, and the tradeoff of practical hacking over academic purity.
