Machine learning in practice

In the last week of my old job, I saw a talk from one of Facebook’s Engineers about how they use machine learning in practice. His talk boiled down to 4 points:

  • More data, better quality data: spend time collecting and cleaning data
  • Practice != theory: often simple models work better in practice as better ones may be too slow
  • Efficiency is key: getting something to work in real time with lots of data is hard
  • 99% Perspiration: actually running the classifier is a tiny fraction of the time


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