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DOCS: sync/async guide for sanic #2884

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sjsadowski
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Much needed guide for explaining what happens when blocking calls are used in Sanic

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codecov bot commented Dec 25, 2023

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All modified and coverable lines are covered by tests ✅

Comparison is base (b651636) 88.039% compared to head (fd65d41) 88.039%.

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Comment on lines +27 to +30
def sync_print(text: str) -> None:
rand_wait: int = randrange(0,5)
time.sleep(rand_wait)
print(f'{text} ({rand_wait}s)')
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I suggest to take the delay as argument, rather than random which only adds to complexity here.

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I'll be using it for consistency when I get to demonstrating the async/await versions. It adds complexity, but it's also a relatively simple path to show the impact of asynchronous code. I'm putting a pin in it, but I'd like your opinion when I've got the section complete.

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Should work with fixed delays similarly for both async and sync. I hope you have read https://trio.readthedocs.io/en/stable/tutorial.html which is a particularly good introduction to async issues (even when not using Trio).

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@Tronic after sleeping on it, I'll revise to use the delay as an argument as you suggest. I don't think the complexity is inherently a problem with using random sleep times, but given how many people seem confused about async/await removing that from the process makes sense.


# Sync and Async in Sanic

Sanic is an **asynchronous** framework - it is designed to be responsive to requests, which allows it to theoretically serve more requests, more quickly, than a synchronous framework. Other python asynchronous frameworks also share the same limitations when calling synchronous code, so the guide below will hopefully serve you if you end up in a situation using something other than Sanic in the future.
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Suggested change
Sanic is an **asynchronous** framework - it is designed to be responsive to requests, which allows it to theoretically serve more requests, more quickly, than a synchronous framework. Other python asynchronous frameworks also share the same limitations when calling synchronous code, so the guide below will hopefully serve you if you end up in a situation using something other than Sanic in the future.
Sanic is an **asynchronous** frameworkit is designed to be responsive to requests, which allows it to theoretically serve more requests, more quickly, than a synchronous framework. Other python asynchronous frameworks also share the same limitations when calling synchronous code, so the guide below will hopefully serve you if you end up in a situation using something other than Sanic in the future.

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Sorry, the typographer in me cannot overlook the mistake of a hyphen for a dash.

@ahopkins
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ahopkins commented Apr 1, 2024

Can we get this finalized soon?

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3 participants