Daniel Lemire

Python sets and dictionaries can have quadratic-time performance https://lemire.me/blog/2026/09/03/python-sets-and-dictionaries-can-have-quadratic-time-performance/

Java’s String.indexOf can be slow (quadratic) https://lemire.me/blog/2026/08/22/javas-string-indexof-can-be-slow-quadratic/

AI programming: a layered model https://lemire.me/blog/2026/09/05/ai-programming-a-layered-model/

Parsing IP addresses in C# at crazy speeds https://lemire.me/blog/2026/08/19/parsing-ip-addresses-in-c-at-crazy-speeds/

The new Go JSON API: twice as fast, or 1.5x slower? https://lemire.me/blog/2026/08/29/the-new-go-json-api-twice-as-fast-or-1-5x-slower/

Memory-level parallelism: AMD is the king https://lemire.me/blog/2026/07/25/memory-level-parallelism-amd-is-the-king/

How fast is C++26’s std::hive? https://lemire.me/blog/2026/08/02/how-fast-is-c26s-stdhive/

Go 1.27 will make some allocations cheaper https://lemire.me/blog/2026/08/15/go-1-27-will-make-some-allocations-cheaper/

Using AI to build your own software https://lemire.me/blog/2026/07/16/using-ai-to-build-your-own-software/

AI programming : are you angry yet? https://lemire.me/blog/2026/08/12/ai-programming-are-you-angry-yet/

Profile-guided optimization in Go https://lemire.me/blog/2026/08/09/profile-guided-optimization-in-go/

Chatting with AI Won’t Make You a Top Programmer https://lemire.me/blog/2026/06/21/chatting-with-ai-wont-make-you-a-top-programmer/

A brief history of C/C++ programming languages https://lemire.me/blog/2026/04/09/a-brief-history-of-c-c-programming-languages/

Converting floats to strings quickly https://lemire.me/blog/2026/02/01/converting-floats-to-strings-quickly/

The fastest way to match characters on ARM processors? https://lemire.me/blog/2026/04/19/the-fastest-way-to-match-characters-on-arm-processors/

How many branches can your CPU predict? https://lemire.me/blog/2026/03/18/how-many-branches-can-your-cpu-predict/

Can your AI rewrite your code in assembly? https://lemire.me/blog/2026/04/05/can-your-ai-rewrite-your-code-in-assembly/

Prefix sums at tens of gigabytes per second with ARM NEON https://lemire.me/blog/2026/03/08/prefix-sums-at-tens-of-gigabytes-per-second-with-arm-neon/

Parsing JSON at compile time with C++26 static reflection https://lemire.me/blog/2026/06/14/parsing-json-at-compile-time-with-c26-static-reflection/

How stagnant is CPU technology? https://lemire.me/blog/2026/01/14/how-stagnant-is-cpu-technology/

How much do amd64 microarchitecture levels help in Go? https://lemire.me/blog/2026/06/06/how-much-do-amd64-microarchitecture-levels-help-in-go/

How bad can Python stop-the-world pauses get? https://lemire.me/blog/2026/02/15/how-bad-can-python-stop-the-world-pauses-get/

Embodied cognition and agentic AI https://lemire.me/blog/2026/05/28/embodied-cognition-and-agentic-ai/

A new way to call C from Java: how fast is it? https://lemire.me/blog/2026/01/17/a-new-way-to-call-c-from-java-how-fast-is-it/

A bit of glass and freedom is all you need https://lemire.me/blog/2026/01/07/a-bit-of-glass-and-freedom-is-all-you-need/

A Fast Immutable Map in Go https://lemire.me/blog/2026/03/29/a-fast-immutable-map-in-go/

JSON and C++26 compile-time reflection: a talk https://lemire.me/blog/2026/03/26/json-and-c26-compile-time-reflection-a-talk/

Text formats are everywhere. Why? https://lemire.me/blog/2026/03/05/text-formats-are-everywhere-why/

You can use newline characters in URLs https://lemire.me/blog/2026/02/28/you-can-use-newline-characters-in-urls/

How fast do browsers correct UTF-16 strings? https://lemire.me/blog/2026/02/21/how-fast-do-browsers-correct-utf-16-strings/

AI: Igniting the Spark to End Stagnation https://lemire.me/blog/2026/02/15/ai-igniting-the-spark-to-end-stagnation/

Converting data to hexadecimal outputs quickly https://lemire.me/blog/2026/02/02/converting-data-to-hexadecimal-outputs-quickly/

What I Got Wrong About “Hard Work” in My 20s https://lemire.me/blog/2026/01/08/what-i-got-wrong-about-hard-work-in-my-20s/

Models and science https://lemire.me/blog/2025/05/23/models-and-science/

The ancient Greeks crafted extraordinary models that continue to resonate. For instance, P

From Institutions to Individuals: the White House Report on Revitalizing U.S. Scientific Leadership https://lemire.me/blog/2026/07/22/from-institutions-to-individuals-the-white-house-report-on-revitalizing-u-s-scientific-leadership/

A quick overview of atomics in C https://lemire.me/blog/2026/09/09/a-quick-overview-of-atomics-in-c/

X just gave us an interface that AI agents can use. I pointed it at my own posts. https://lemire.me/blog/2026/07/11/x-just-gave-us-an-interface-that-ai-agents-can-use-i-pointed-it-at-my-own-posts/

Optimizing Python scripts with AI https://lemire.me/blog/2026/01/25/optimizing-python-scripts-with-ai/

Does a PhD Pay Off? https://lemire.me/blog/2026/07/24/does-a-phd-pay-off/

The cost of a function call https://lemire.me/blog/2026/02/08/the-cost-of-a-function-call/