Oct 3, 2025 — 7 min — Platform & AI
The Three-Run Lab: How I Triage Slow PyTorch Training
A repeatable triage routine — the three-run baseline, DataLoader diagnosis, five profiler signatures, and a copy-paste scaffold — for finding where training time actually goes before touching the model.
Outcome: Identified and resolved training bottlenecks in under an hour by running the three-run baseline and reading profiler signatures before changing any model code.