// Hacker Noon · 5 February 2026

Why Measuring Time is Not Enough: a Practical Roofline Model for ML Training

When we want to speed up training, the first instinct is to measure time and start optimizing the slowest kernel. But raw measurements don’t tell the full story. We also need to understand the theoretical lower bound. How fast could this kernel be on the given hardware. The examples above are tools...

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