This Compiler Bottleneck Took 16 Hours Off Our Training Time
60-hour training sessions became the new norm. The GPU was saturated, the data pipelines looked healthy, and the infra monitoring didn’t flag any issues. But something was off. The model was not large, nor was the data complex enough to justify the duration. What we eventually discovered was not in the Python code or the model definition. It was buried deep in the stack stack. Identifying hidden obstacles









