Comments (7)
I don't feel comfortable enough with ReactiveSwift
's codebase to put together a concrete proposal, but I can gather a summary of the different back pressure mechanisms used across the various reactive platforms so that it can serve as a a start for the discussions.
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SignalProducer
?
from reactiveswift.
using stream1.concat(...)
with a SignalProducer
will start the SignalProducer
before the client actually gets to consume the stream1
entirely, which is useless in the context of backpressure (that can be used to implement paging of infinite resources in the case of a slow consumer)
from reactiveswift.
If you don't mind, would you please provide a more concrete context or examples of the obstacles you are facing? Otherwise, it would be hard to understand what you are looking for.
Your original question on RxSwift.deferred
does already have an answer: it works in a similar semantic as SignalProducer
as a type. It defers the creation of the signal until it is started, and creates a signal for each start attempts, thus being called "producer".
http://reactivex.io/documentation/operators/defer.html
from reactiveswift.
Let's say that I have an HTTP API that provides a virtually unlimited amount of data through paging.
The basic use case is that I would like to provide a SignalProducer
that will provide all the elements from the HTTP API. However, let's say that the consumer of the SignalProducer
is much slower than the fetching of the HTTP API (and that it runs in a different scheduler). What will happen with ReactiveSwift
is that an unbounded buffer of elements will accumulate until it exhausts all the memory.
What I would love to see is any way in ReactiveSwift
to circumvent this issue and make the producer as slow as the consumer. Does that make sense?
from reactiveswift.
We don't have a plan to support defer, but I'm definitely interested in providing some back pressure mechanisms. Would you be interested in putting together a proposal or PR? That'd be the best way to move something like this forward. Or even just putting together a survey of different back pressure mechanisms used across different reactive platforms.
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Closing due to inactivity. If you are still interested in discussing this, please open a new Issue with your purpose (or a set of links with different approaches for the mechanism).
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Related Issues (20)
- Release 6.6.0 requires Swift 5.3 and therefore Xcode 12.x
- Using "<~" binding function with Signal.Observers causes memory leaks. HOT 3
- Using old xcconfig causing problems with Carthage & Apple Silicon macOS builds
- Support await / AsyncSequence HOT 13
- Playground does not work HOT 1
- Hello, ask a question about Disposable, thanks HOT 1
- What's means 'targeting' in QueueScheduler? HOT 2
- Signal.merge reported issue after migrating from ReactiveSwift from 4.0.0 -> 6.6.0 HOT 2
- xCode13 CompileSwiftSources normal x86_64 com.apple.xcode.tools.swift.compiler
- Usage with SwiftUI HOT 4
- Could not find module 'ReactiveSwift' for target 'arm64-apple-ios-simulator' HOT 2
- [BUG] XCode 14 beta 3 - bitcode issue HOT 1
- Is it planned to add count argument to `collect(every:on:skipEmpty:discardWhenCompleted:)`?
- Adopt OSAllocatedUnfairLock on iOS 16 HOT 9
- Add support for mapping Property/MutableProperty types to a Binding
- Signal triggered by phone call when device is closed HOT 3
- Infinite recursion in observeSwitchToLatest() HOT 3
- EXC_BAD_ACCESS Crashes occur in xcode15 HOT 4
- Reactive Swift crash with getCache function and observeSwitchToLatest signal
- Is there any plan for future releases? HOT 3
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