Daniel Lemire's blog

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Daniel Lemire is a software performance expert. He ranks among the top 2% of scientists globally (Stanford/Elsevier 2024) and is one of GitHub's top 1000 most followed developers.

A summer of AI optimization

More than a taken branch per cycle?

The data does not show mass unemployment

AI is breaking the academic sorting machine

How did Apple Silicon get 50% faster in three years?

Faster JSON parsing with SVE2 on ARM processors

How did AMD Ryzen get 50% faster in two years?

How fast is C++23’s std::flat_map?

Subnormal floating-point numbers are expensive… on Intel processors

The four-colour theorem was only the start

Fear Is Not an Argument

A quick overview of atomics in C

AI programming: a layered model

Python sets and dictionaries can have quadratic-time performance

The new Go JSON API: twice as fast, or 1.5x slower?

Java's String.indexOf can be slow (quadratic)

Parsing IP addresses in C# at crazy speeds

Go 1.27 will make some allocations cheaper

AI programming : are you angry yet?

Profile-guided optimization in Go