This talk, "Performance Matters" by Emery Berger, is blowing my mind. youtube.com/watch?v=r-TLSBdHe1

Summary: profilers from ~20 years ago (what I talked about when I was doing performance work back in the day) are no longer as useful. There is evidence that unpredictable things like memory layout can change performance by ~40%. Everything is async, concurrent these days, and profilers don't cope.

Shows newer methods and a new profiler, and gets awesome results.

@hergertme you'll enjoy this :)

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The referenced paper, "Producing Wrong Data Without Doing Anything Obviously Wrong", seems pretty cool! - users.cs.northwestern.edu/~rob

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