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Concurrency is not Parallelism by Rob Pike

gnbitcom · 190.7K views · 2015-11-11 · 31:23

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Overview

Rob Pike's Go talk distinguishing concurrency, the structuring of independent processes, from parallelism, their simultaneous execution. It uses Go channels and goroutines to illustrate.

On Hacker News

The standard link for explaining the concurrency versus parallelism distinction and the motivations behind Go's concurrency model.

Recommended by 4 HN people across 4 months · HN mentions 2021–2025

Topics

C, C++, Rust, Go & systems languagesSoftware architecture & design
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concurrencyparallelismgogoroutinesrob pike

What people said

duped · 2024-09 · Strong recommendation

If you prefer to learn by video, here's an excellent talk on the same subject by Rob Pike that I link all the time to people [VIDEO]

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auxiliarymoose · 2025-12 · Recommendation

Agreed. Rob Pike presented a good talk "Concurrency is not Parallelism" which explains the motivations behind Go's concurrency model: [VIDEO] Between the lack of "colored functions" and the simplicity of communicating with channels, I keep surprising myself with how (relatively) quick and easy it is to develop concurrent systems with correct behavior in Go.

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cratermoon · 2022-10 · Recommendation

Anyone that can wrap their mind around the model of Communicating Sequential Processes[1] implemented using channels in Go will improve their programming. See also Concurrency is not Parallelism by Rob Pike: [VIDEO] After I figured it out, I spent a good month writing personal projects to play with channels and concurrency and get the "these are cool I'm going to use them everywhere" urge out of my system. 1 [LINK]

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Sources

Video by gnbitcom, played through YouTube.

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