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Subnormal floating-point numbers are expensive on Intel processors

69 points · 54 comments · zdw

  1. pixelpoet · · focus · HN ↗
    This has been the case since a zillion years, since the Core 2 Duo days at minimum.
    1. account42 · · focus · HN ↗
      The interesting part is that this seems to be Intel-specific.
      1. pixelpoet · · focus · HN ↗
        That's what I mean though- in the Core 2 Duo vs K8 / Athlon days, Intel was much slower for denormals and subnormals than AMD. I'm not sure why but I thought this was common knowledge.
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