Mikhail Maslo

Coroutine explained yet again 60 years later

What if you could write asynchronous code that looks completely sequential? Discover how coroutines, a 60-year-old concept, finally solve callback hell.

Coroutine explained yet again 60 years later
#1about 1 minute

Celebrating the 60-year history of coroutines

Coroutines were first introduced 60 years ago by Melvin Conway in his work on a COBOL compiler to optimize its structure.

#2about 7 minutes

How coroutines suspend and resume using state machines

Unlike regular functions, coroutines can suspend their execution and resume later, a process managed internally by a state machine.

#3about 4 minutes

Comparing stackful and stackless coroutine models

Stackful coroutines have their own dedicated stack and can suspend from nested functions, while stackless coroutines save their state on the heap.

#4about 7 minutes

Exploring symmetric and asymmetric coroutine control flow

Asymmetric coroutines return control to their caller upon suspension, whereas symmetric coroutines can transfer control directly to another coroutine.

#5about 7 minutes

How coroutines fit into modern threading models

Coroutines function as lightweight user-level threads that are managed within a process, making them more memory-efficient than kernel threads.

#6about 5 minutes

Using coroutines to write linear asynchronous code

Modern languages use coroutines with async/await syntax to transform nested callbacks into linear, more readable code for I/O-bound operations.

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