The Polymathic Engineer

The Polymathic Engineer

Concurrency and Parallelism

How computers do more things at once and faster: thread concurrency, instruction parallelism and SIMD.

Franco Fernando's avatar
Franco Fernando
Sep 26, 2025
∙ Paid

Hi Friends,

Welcome to the 141st issue of the Polymathic Engineer newsletter.

This week we talk about how computers implement concurrency and parallelism at OS and CPU level. The outline will be as follows:

  • Concurrency vs parallelism

  • Thread-Level Concurrency

  • Instruction-Level Parallelism

  • SIMD Parallelism

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