go-concurrency-test | Test the performance of Go 's concurrency | Reactive Programming library

 by   robaho Go Version: Current License: No License

kandi X-RAY | go-concurrency-test Summary

kandi X-RAY | go-concurrency-test Summary

go-concurrency-test is a Go library typically used in Programming Style, Reactive Programming applications. go-concurrency-test has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

after discussion in go incident 28938 i am prepared to make some final conclusions. concurrent map data structures in go are most efficiently implemented using locks and the built-in map implementations. this is especially true if the structure can be sharded to avoid single write mutex contention (see "shared shard" impl). locks are very efficient in go due to the user-threading of go routines. the problem with go's sync.map is that it is "non-internal", unlike the built-in map implementation. so multiple layers of indirection are required to accomplish some operations (use of interfaces, no atomic cas at the table entry level). in my tests i developed a fully concurrent "shared intmap" which shows excellent performance, but for a variety of reasons this is not a general solution, but it shows the performance potential of a redesigned sync.map. the go incident above links to several issues #21031, #21035, and #15292 that when resolved should bring sync.map performance inline with java's concurrenthashmap. to be fair, most of performance issues with sync.map only surface with a large map, with a large working set of active keys, as the indirection is especially painful due to cpu cache misses. i added 'intmap' versions - which are fixed sized maps (without
Support
    Quality
      Security
        License
          Reuse

            kandi-support Support

              go-concurrency-test has a low active ecosystem.
              It has 25 star(s) with 2 fork(s). There are 3 watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              go-concurrency-test has no issues reported. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of go-concurrency-test is current.

            kandi-Quality Quality

              go-concurrency-test has 0 bugs and 0 code smells.

            kandi-Security Security

              go-concurrency-test has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              go-concurrency-test code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              go-concurrency-test does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
              OutlinedDot
              Without a license, all rights are reserved, and you cannot use the library in your applications.

            kandi-Reuse Reuse

              go-concurrency-test releases are not available. You will need to build from source code and install.
              Installation instructions are not available. Examples and code snippets are available.

            Top functions reviewed by kandi - BETA

            kandi has reviewed go-concurrency-test and discovered the below as its top functions. This is intended to give you an instant insight into go-concurrency-test implemented functionality, and help decide if they suit your requirements.
            • Put adds a value to the map .
            • NewChannelCache creates a new ChannelCache
            • nextPowerOf2 returns the next power of 2 .
            • SharedShardCache creates a new sharedShardCache .
            • NewShardCache returns a new ShardCache .
            • NewIntMap returns a new int map .
            • NewSharedIntMap returns a new sized int map .
            • NewLockCache returns a new LockCache .
            • NewSyncCache returns a new SyncCache
            • NewUnsharedCache returns a new unshared cache
            Get all kandi verified functions for this library.

            go-concurrency-test Key Features

            No Key Features are available at this moment for go-concurrency-test.

            go-concurrency-test Examples and Code Snippets

            No Code Snippets are available at this moment for go-concurrency-test.

            Community Discussions

            QUESTION

            How to use RXJS to share a pool of resources between multiple consumers
            Asked 2022-Mar-31 at 12:55

            How can we divide work of consumers over a limited set of resources in RXJS?

            I have a Pool class here (simplified):

            ...

            ANSWER

            Answered 2022-Mar-31 at 12:55

            So the main thing is you need to share the actual part that does the work, not only the resources.

            Here's a solution from me:

            https://stackblitz.com/edit/rxjs-yyxjh2?devToolsHeight=100&file=index.ts

            Source https://stackoverflow.com/questions/71689376

            QUESTION

            How to implement the logic without state variables
            Asked 2022-Mar-23 at 18:10

            There are two observables: the first named activator emits booleans. The second named signaler emits void events. There's a function f() which must be called under the next conditions:

            If the last event from activator is true, and event from signaler comes, call f(). Otherwise (the last activator's event is false, or activator has not yet emitted anything), "remember" that signaler sent the event. As soon as activator emits true, call f() and clear "remembered" flag.

            Example:

            ...

            ANSWER

            Answered 2022-Mar-23 at 18:10

            You need a state machine, but you can contain the state so you aren't leaving the monad... Something like this:

            Source https://stackoverflow.com/questions/71590666

            QUESTION

            Caching parallel request in Spring Webflux Mono
            Asked 2022-Mar-10 at 21:09

            We are using spring webflux (project reactor), as part of the requirement we need to call one API from our server.

            For the API call, we need to cache the response. So we are using Mono.cache operator.

            It caches the response Mono and the next time the same API call happens, it will get it from the cache. Following is example implementation

            ...

            ANSWER

            Answered 2022-Mar-03 at 14:54

            You can initialize the Mono in the constructor (assuming it doesn't depend on any request time parameter). Using cache operator will prevent multiple subscriptions to the source.

            Source https://stackoverflow.com/questions/71311319

            QUESTION

            Mirror at most 1 value from source, then temporarily drop values until another observable emits
            Asked 2022-Jan-20 at 13:05

            I would like to combine two observables in such a way that

            • I mirror at most 1 value from the source observable (same moment it arrives),
            • Then ignore its subsequent values until the notifier observable emits;
            • Then, I allow to mirror at most 1 more value from the source;
            • After which I again ignore elements until the notifier observable emits
            • etc.

            Source:

            ...

            ANSWER

            Answered 2022-Jan-20 at 13:05

            I believe this is a simple use case of the throttle() operator.

            Source https://stackoverflow.com/questions/70786489

            QUESTION

            Project Reactor: buffer with parallel execution
            Asked 2021-Dec-10 at 14:44

            I need to copy date from one source (in parallel) to another with batches.

            I did this:

            ...

            ANSWER

            Answered 2021-Dec-04 at 19:50

            You need to do your heavy work in individual Publisher-s which will be materialized in flatMap() in parallel. Like this

            Source https://stackoverflow.com/questions/70083756

            QUESTION

            UseCases or Interactors with Kt Flow and Retrofit
            Asked 2021-Dec-06 at 15:34

            Context

            I started working on a new project and I've decided to move from RxJava to Kotlin Coroutines. I'm using an MVVM clean architecture, meaning that my ViewModels communicate to UseCases classes, and these UseCases classes use one or many Repositories to fetch data from network.

            Let me give you an example. Let's say we have a screen that is supposed to show the user profile information. So we have the UserProfileViewModel:

            ...

            ANSWER

            Answered 2021-Dec-06 at 14:53

            The most obvious problem I see here is that you're using Flow for single values instead of suspend functions.

            Coroutines makes the single-value use case much simpler by using suspend functions that return plain values or throw exceptions. You can of course also make them return Result-like classes to encapsulate errors instead of actually using exceptions, but the important part is that with suspend functions you are exposing a seemingly synchronous (thus convenient) API while still benefitting from asynchronous runtime.

            In the provided examples you're not subscribing for updates anywhere, all flows actually just give a single element and complete, so there is no real reason to use flows and it complicates the code. It also makes it harder to read for people used to coroutines because it looks like multiple values are coming, and potentially collect being infinite, but it's not the case.

            Each time you write flow { emit(x) } it should just be x.

            Following the above, you're sometimes using flatMapMerge and in the lambda you create flows with a single element. Unless you're looking for parallelization of the computation, you should simply go for .map { ... } instead. So replace this:

            Source https://stackoverflow.com/questions/70246942

            QUESTION

            DT: Dynamically change column values based on selectinput from another column in R shiny app
            Asked 2021-Nov-15 at 09:56

            I am trying to create a table (with DT, pls don't use rhandsontable) which has few existing columns, one selectinput column (where each row will have options to choose) and finally another column which will be populated based on what user select from selectinput dropdown for each row.

            in my example here, 'Feedback' column is the user dropdown selection column. I am not able to update the 'Score' column which will be based on the selection from 'Feedback' column dropdown.

            ...

            ANSWER

            Answered 2021-Sep-30 at 14:31

            I'd suggest using dataTableProxy along with replaceData to realize the desired behaviour. This is faster than re-rendering the datatable.

            Furthermore, re-rendering the table seems to be messing around with the bindings of the selectInputs.

            Also please note: for this to work I needed to switch to server = TRUE

            Source https://stackoverflow.com/questions/69344974

            QUESTION

            Send a list of objects one at time in reactive way
            Asked 2021-Oct-18 at 21:46

            I'm receiving a request through a rest controller method with an object that I'm then passing to a method in the service layer.

            The object in this request contains a list as follows:

            ...

            ANSWER

            Answered 2021-Oct-18 at 16:21

            The expected way to do that is to actually use the fromIterable method and provide your List:

            Source https://stackoverflow.com/questions/69618904

            QUESTION

            Changing the target of a `whenever` block from the inside
            Asked 2021-Oct-07 at 10:20

            The following code attempts to react to one Supply and then, based on the content of some message, change its mind and react to messages from a different Supply. It's an attempt to provide similar behavior to Supply.migrate but with a bit more control.

            ...

            ANSWER

            Answered 2021-Oct-07 at 10:20

            I tend to consider whenever as the reactive equivalent of for. (It even supports the LAST loop phaser for doing something when the tapped Supply is done, as well as supporting next, last, and redo like an ordinary for loop!) Consider this:

            Source https://stackoverflow.com/questions/69475222

            QUESTION

            How to apply back pressure with Combine buffer operator to avoid flatMap to ask an infinite demand upstream?
            Asked 2021-Oct-05 at 15:18

            I'm trying to use Combine to do several millions concurrent request through the network. Here is a mock up of the naive approach I'n using:

            ...

            ANSWER

            Answered 2021-Oct-05 at 15:18

            The issue appears to be a Combine bug, as pointed out here. Using Publishers.Sequence causes the following operator to accumulate every value sent downstream before proceeding.

            A workaround is to type-erase the sequence publisher:

            Source https://stackoverflow.com/questions/69424516

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install go-concurrency-test

            You can download it from GitHub.

            Support

            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
            Find more information at:

            Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items

            Find more libraries
            CLONE
          • HTTPS

            https://github.com/robaho/go-concurrency-test.git

          • CLI

            gh repo clone robaho/go-concurrency-test

          • sshUrl

            git@github.com:robaho/go-concurrency-test.git

          • Stay Updated

            Subscribe to our newsletter for trending solutions and developer bootcamps

            Agree to Sign up and Terms & Conditions

            Share this Page

            share link

            Consider Popular Reactive Programming Libraries

            axios

            by axios

            RxJava

            by ReactiveX

            async

            by caolan

            rxjs

            by ReactiveX

            fetch

            by github

            Try Top Libraries by robaho

            fixed

            by robahoGo

            go-trader

            by robahoGo

            keydb

            by robahoGo

            goanalyzer

            by robahoGo

            lrmp

            by robahoJava