"Performance Matters" by Emery Berger

What this video covers

Emery Berger explains why performance is hard to measure and deliver on modern hardware, showing how code layout and alignment can swamp optimization effects. He presents Stabilizer for statistically sound evaluation and Coz, a causal profiler.

Why it surfaced in Hacker News

It is the standard recommendation for anyone puzzled by unexplained benchmark changes from tiny code edits, and for learning about causal profiling.

Recommendation context

Short excerpts from positive mentions. Open the source to read the full Hacker News discussion.

“is a great talk”

“which I highly recommend. Lots of really nice insight, even outside of this tool.”

“this is the most amazing optimisation information I have seen”