Daniel Lemire's blog

Data Science, Indexing and Software Performance

Tech Programming

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ConvertMyBankStatement - PDF to Excel & CSV Converter

Convert any PDF bank statement to Excel or CSV instantly. Works with password-protected files. Save hours of manual data entry.

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September 22

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Daniel Lemire's blog

2 days ago

Daniel Lemire's blog -- September 16, 2026

Daniel Lemire's blog -- September 16, 2026 September 15, 2026 Subnormal floating-point numbers are expensive… on Intel processors We represent floating-point numb...

Tech Programming

ConvertMyBankStatement - PDF to Excel & CSV Converter

Convert any PDF bank statement to Excel or CSV instantly. Works with password-protected files. Save hours of manual data entry.

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September 11

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Daniel Lemire's blog

14 days ago

Daniel Lemire's blog -- September 9, 2026

Daniel Lemire's blog -- September 9, 2026 September 5, 2026 AI programming: a layered model In the late 1960s and 1970s, ...

Tech Programming

ConvertMyBankStatement - PDF to Excel & CSV Converter

Convert any PDF bank statement to Excel or CSV instantly. Works with password-protected files. Save hours of manual data entry.

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September 4

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Daniel Lemire's blog

21 days ago

Daniel Lemire's blog -- September 2, 2026

Daniel Lemire's blog -- September 2, 2026 August 29, 2026 The new Go JSON API: twice as fast, or 1.5x slower? JSON is a standard format for data interchange. It is...

Tech Programming

ConvertMyBankStatement - PDF to Excel & CSV Converter

Convert any PDF bank statement to Excel or CSV instantly. Works with password-protected files. Save hours of manual data entry.

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August 28

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Daniel Lemire's blog

28 days ago

Daniel Lemire's blog -- August 26, 2026

Daniel Lemire's blog -- August 26, 2026 August 22, 2026 Java’s String.indexOf can be slow (quadratic) In Java, you find the location of a substring using indexOf....

Tech Programming

ConvertMyBankStatement - PDF to Excel & CSV Converter

Convert any PDF bank statement to Excel or CSV instantly. Works with password-protected files. Save hours of manual data entry.

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August 21

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Daniel Lemire's blog

about 1 month ago

Daniel Lemire's blog -- August 19, 2026

Daniel Lemire's blog -- August 19, 2026 August 15, 2026 Go 1.27 will make some allocations cheaper Like most programming languages, Go has both stack allocations,...

Tech Programming

ConvertMyBankStatement - PDF to Excel & CSV Converter

Convert any PDF bank statement to Excel or CSV instantly. Works with password-protected files. Save hours of manual data entry.

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August 14

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Daniel Lemire's blog

about 1 month ago

Daniel Lemire's blog -- August 12, 2026

Daniel Lemire's blog -- August 12, 2026 August 9, 2026 Profile-guided optimization in Go When a compiler optimizes your program, it has to guess. Which functions a...

Tech Programming

ConvertMyBankStatement - PDF to Excel & CSV Converter

Convert any PDF bank statement to Excel or CSV instantly. Works with password-protected files. Save hours of manual data entry.

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August 7

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Daniel Lemire's blog

about 2 months ago

Daniel Lemire's blog -- August 5, 2026

Daniel Lemire's blog -- August 5, 2026 August 2, 2026 How fast is C++26’s std::hive? C++26 adds a new container to the sta...

Tech Programming

ConvertMyBankStatement - PDF to Excel & CSV Converter

Convert any PDF bank statement to Excel or CSV instantly. Works with password-protected files. Save hours of manual data entry.

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July 31

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Daniel Lemire's blog

about 2 months ago

Daniel Lemire's blog -- July 29, 2026

Daniel Lemire's blog -- July 29, 2026 July 25, 2026 Memory-level parallelism: AMD is the king When your program asks for memory that is not in cache, the processo...

Tech Programming

ConvertMyBankStatement - PDF to Excel & CSV Converter

Convert any PDF bank statement to Excel or CSV instantly. Works with password-protected files. Save hours of manual data entry.

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July 24

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Daniel Lemire's blog

2 months ago

Daniel Lemire's blog -- July 22, 2026

Daniel Lemire's blog -- July 22, 2026 July 16, 2026 Using AI to build your own software A few years ago, a friend of mine was stuck. He needed to quickly process over a hundred hi...

Tech Programming

ConvertMyBankStatement - PDF to Excel & CSV Converter

Convert any PDF bank statement to Excel or CSV instantly. Works with password-protected files. Save hours of manual data entry.

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July 17

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Daniel Lemire's blog

2 months ago

Daniel Lemire's blog -- July 15, 2026

Daniel Lemire's blog -- July 15, 2026 July 11, 2026 X just gave us an interface that AI agents can use. I pointed it at my own posts. I have been on X for a long t...

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