Daniel Lemire's blog

Data Science, Indexing and Software Performance

Programming Tech

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April 25

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Daniel Lemire's blog

14 days ago

Daniel Lemire's blog -- April 23, 2025

Daniel Lemire's blog -- April 23, 2025 April 20, 2025 Streamlined iteration: exploring keys and values in C++20 In software, we often use key-value data structures...

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April 18

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Daniel Lemire's blog

21 days ago

Daniel Lemire's blog -- April 16, 2025

Daniel Lemire's blog -- April 16, 2025 April 13, 2025 Detect control characters, quotes and backslashes efficiently using ‘SWAR’ When trying to write fast functio...

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April 11

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Daniel Lemire's blog

28 days ago

Daniel Lemire's blog -- April 9, 2025

Daniel Lemire's blog -- April 9, 2025 April 7, 2025 How helpful is AI? Do large language models (AI) make you 3x faster or only 3% faster? The answer depends on t...

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April 4

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Daniel Lemire's blog -- April 2, 2025

Daniel Lemire's blog -- April 2, 2025 March 29, 2025 Mixing ARM NEON with SVE code for fun and profit Most mobile devices use 64-bit ARM processors. A growing numb...

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March 28

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Daniel Lemire's blog -- March 26, 2025

Daniel Lemire's blog -- March 26, 2025 March 24, 2025 Unsigned comparisons using signed types There are two main types of fixed-precision integers in modern softwa...

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March 21

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about 2 months ago

Daniel Lemire's blog -- March 19, 2025

Daniel Lemire's blog -- March 19, 2025 March 15, 2025 Speeding up C++ code with template lambdas Let us consider a simple C++ function which divides all values in ...

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March 14

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Daniel Lemire's blog -- March 12, 2025

Daniel Lemire's blog -- March 12, 2025 March 9, 2025 An overview of parallel programming (Go edition) In practice, the software we write runs on several processors...

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March 7

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2 months ago

Daniel Lemire's blog -- March 5, 2025

Daniel Lemire's blog -- March 5, 2025 March 1, 2025 How fast can you open 1000 files? Jarred Sumner, the main author of the Bun JavaScript engine, commented a few ...

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February 21

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3 months ago

Daniel Lemire's blog -- February 19, 2025

Daniel Lemire's blog -- February 19, 2025 February 14, 2025 AVX-512 gotcha: avoid compressing words to memory with AMD Zen 4 processors Convention computer instruc...

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February 14

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3 months ago

Daniel Lemire's blog -- February 12, 2025

Daniel Lemire's blog -- February 12, 2025 February 7, 2025 Thread-safe memory copy A common operation in software is the copy of a block of memory. In C/C++, we of...

Programming Tech