getfromjsonasync blazorquirky non specific units of measurement

We were excited with the possibility of running some of our code in our web application. You can avoid this exception by one of these solutions: Solution 1. Some considerations as to what might be slow: You can find our example Blazor project that has no UI but runs the wasm and reports to the console here: https://github.com/hypar-io/Elements/tree/wasm-perf/Elements.Wasm. We have a couple of demos of interactive 3d geometry editing and display using Blazor wasm. Any other tips? I will try it on Blazor 5 preview 8 soon. Create or load a JSON file under the wwwroot folder. The examples in this section require a package reference for Microsoft.Extensions.Http for the standalone or Client app. To resolve these: Make the new file a partial class. If you're using Visual Studio, you'll see it's nested "inside" the Blazor component. If you have write-permissions please help me learn by adding exactly one area label. I've been having similar issues. If you are using the net5.0 you should look at the System.Net.Http.Json extensions. which explained me I had to use the HttpClientJsonExtensions, as mentioned in next fragment from the site: So, after downloading the samples and having a quick look at the RestApi.Client project (which contains the By clicking Sign up for GitHub, you agree to our terms of service and Both Newtonsoft and STJ are slow. Good improvement. Either way, serialisation is painfully slow for what is really not that much data. Difference between STJ and MessagePack is more visible on low config machine. JsonSerializer.Deserialize is intolerably slow in Blazor WebAssembly, but very fast in .NET Core integration test. First, and most importantly, thanks to the team working on Blazor and web assembly. Blazor WASM has been great for the most part but this performance issue is making it really difficult to view Blazor as a viable option for some of the more data intensive projects I have coming up. https://www.youtube.com/watch?v=2moh18sh5p4. It took around 13 seconds to get 53,000 weather forecasts in v 3.1 but 7 seconds in 5.0.0-rc1. Memory\CPU. Step 3 Step 4 Here we will select Framework type as .NET 6.0 and also select the ASP.NET Core hosted option. We're finding ways to manage things, but it does seem like there ought to be a way to get 50,000 small objects deserialized in a second or two. In either case, since both Newtonsoft and STJ are slow there is likely something else going on. Both are fast with small payloads. However, there are a couple areas known to be slow that could be made faster in the serializer. I created a Blazor Server App which gets its data from If the performance of Blazor is slow in a particular browser, that's more likely a wasm implementation issue for the team that maintain that browser as opposed to a Blazor/Mono .Net issue. After searching for a while, I came through next site : https://learn-blazor.com/architecture/rest-api. If you're using Visual Studio, when you copy API response into the clipboard, you can then use "Edit | Paste Special | Paste JSON as Classes" to generate . (I've replaced a call to GetFromJsonAsync with code from inside it, to narrow down the slow part. So, my question is quit obvious, how can I have the same behavior in my Blazor Server based app, because there are no Consuming REST APIs. How to help a successful high schooler who is failing in college? Blazor Server and Blazor WebAssembly. I will consider gRPC but it's not my preferred way to fix this. to your account, In my Blazor app, I have a component that has a method like this. LO Writer: Easiest way to put line of words into table as rows (list). Yes I am using .NET 5. In blazor client side application, can read and data from json file async way. We have an .NET open source library that is used heavily in back end services run on AWS Lambda. This tells me there's no slowness in updating the DOM or rendering. Tagging subscribers to this area: @CoffeeFlux The timings were again similar. Anytime we want to display profile details in any component we can bind to it The green is the download and the orange is "perform microtasks", which I assume means WebAssembly work. @tareqimbasher @szalapski 2MB json file is taking about 7 seconds to deserialize which is not acceptable. @rajeshaz09 I assume you've measured against 5.0 .NET since there have been gains. Stack Overflow for Teams is moving to its own domain! privacy statement. What is a good way to make an abstract board game truly alien? Anyway, extrapolating 332K to your 1MB is a 3x factor, so I assume it would take about 372ms * 3 = ~1.1 seconds to deserialize (on my fast desktop in isolation). Why so many wires in my old light fixture? You should have not try to belittle me just in order to post this video. 0 0 Question text/sourcefragment 2/25/2021 9:50:53 PM Anonymous 0 The requested data as a json-string which is finally deserialized to the required object-type. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. If the app requires a custom user account class that extends RemoteUserAccount, swap the custom user account class for RemoteUserAccount in the following code. What exactly makes a black hole STAY a black hole? I just did that comparison to ensure that the download speed is not relevant--regardless of whether the download is 20 ms or 20,000 ms, the deserialization is quite slow. In this crash course, we build an actual Blazor WebAssembly application based on .NET 5. I couldn't figure out the best area label to add to this issue. Which version of Blazor are you using? You'll need to tick the "Include pre-release" option in the NuGet package manager, because the package hasn't been fully released yet: NuGet Gallery | Microsoft.AspNetCore.Blazor.HttpClient 3.1.-preview1.19508.20 [ ^] 3 solutions Top Rated Most Recent Solution 3 It's required to add using Microsoft.AspNetCore.Components https://www.youtube.com/watch?v=2moh18sh5p4. We will call it Create.razor. I assume you want the value for data before you want to go the a different page, so what you had before is already correct. WebAssembly hosted App), I see next referenced dependencies: Which has (apparently) the extension method on the Http class for using GetJsonAsync() method from within the Client App. Is the test running in isolation on dedicated hardware or is it hosted? Blazor is a framework for building interactive client-side web UI with .NET. How can I diagnose that? The common methods include: GetFromJsonAsync: Sends an HTTP GET request and parses the JSON response body to create an object. Above way page routing happened once data fetch complete. We can call methods in our library that do some pretty complicated geometry stuff and they run at near native speed. mkArtakMSFT to in Blazor.Docs on Nov 1, 2019 guardrex, Backlog on Nov 9, 2019 pranavkm completed Blazor.Docs to guardrex guardrex mentioned this issue Call out the package requirement clearly #15687 Typical MS DOCs: GetJsonAsync #15843 Blazor call webAPI enhancements #15845 guardrex mentioned this issue on May 20, 2021 (Download time on localhost is about 20 ms.) using the default code, await Http.GetFromJsonAsync("WeatherForecast"); So this seems consistent with the timings on my slightly more complex case in the original question. 2022 Moderator Election Q&A Question Collection. How do I enable validation without using the DataAnnotationValidator? Microsoft Graph SDKs are designed to simplify building high-quality, efficient, and resilient applications that access Microsoft Graph. The 1-6 seconds was over the internet, whereas the 20ms was running against a local web service. The benchmark containing the same code run on the desktop, shows the following for writing to gltf: It takes nearly 67x as long to run in web assembly. I've found Utf8Json to be much faster than both Newtonsoft and System.Text.Json. In your Blazor app use this code to automatically deserialize: await Http.GetFromJsonAsync<ComponentDto>(.) For more information, see Supported collection types in System.Text.Json.. You can implement custom converters to handle additional types or to provide functionality that isn't supported by the built-in converters.. How to read JSON as .NET objects (deserialize) A common way to deserialize JSON is to first create a class with properties and fields that represent one or more of the JSON properties. This may be the root of the problem. @enetstudio : Actually i am using client side blazor application, your solution not work with my scenario. I'm already avoiding non-generic lists and objects that are of type System.Object. Sunday, October 13, 2019 7:23 PM text/sourcefragment 10/16/2019 1:57:00 PM Anonymous 0 @using System.Net.Http @using System.Net.Http.Json I'm using Blazor 3.2.0 with System.Text.Json 5.0.0-preview.7. Already on GitHub? Is there also rendering going on (or other CPU tasks) that would affect perf significantly? Provide the required scopes to the Scopes . You can find the corresponding benchmark WasmComparison here: a Web API Core 3.0 Project, nothing fency, getting data at startup in the Index razor page is to your account. "The StackOverflow test runs <4 seconds for @HenkHolterman and 7-12 seconds for @szalapski. Find centralized, trusted content and collaborate around the technologies you use most. It's a pleasure to use. Also @szalapski on download perf you originally said: but with your latest test from StackFlow you said: It indeed takes 7-12 seconds to return 17000 items (about 1.6 MB) of WeatherForecast. Blazor is a framework built by Microsoft for creating interactive client-side web UI with .NET codebase. In chrome the deserialization took took ~4 seconds (that's actually "good enough" for me, at least right now) The test is running on my laptop. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Anyhow, your new code snippet, which you say is working, is actually the first code snippet implemented in two methods, and thus, if it works as two methods, it should work as a single combined method. When we submit the form, it fires a POST request to the API and returns the full entity back, including the ID as a response. Solution 2. - limit attaching the access token to only URLs under the specified subpath. In Program.cs, configure the MSAL authentication to use the custom user account factory: If the app uses a custom user account class that extends RemoteUserAccount, swap the custom user account class for RemoteUserAccount in the following code: The examples in this section use a named HttpClient for Graph API to obtain a user's mobile phone number to process a call. In VS2019 (Version 16.3.8) for ordering pizzas. If so I think that should be next. This video is part of The FREE Blazor Crash Course. When the migration is complete, you will access your Teams at stackoverflowteams.com, and they will no longer appear in the left sidebar on stackoverflow.com. I do hope that you're not the presenter in the video. This is where we populate a form with our Team entity, which includes name, shirt colour and location. (Download time on localhost is about 20 ms.). Asking for help, clarification, or responding to other answers. The app must have the User.Read Graph API scope configured in AAD. Do you get it ? Making statements based on opinion; back them up with references or personal experience. For example, here we have created a simple employee.json file and read its values in a Razor component. Confirm correct package versions at NuGet.org. I have tried like this below code, Error CS0029 - Cannot implicitly convert type System.Threading.Tasks.Task' to 'Application1.Models.DBModel'. There are two hosting models available for Blazor. The 1-6 seconds was over the internet, whereas the 20ms was running against a local web service. Some are in preview7 some are in later builds. This code works on both the server-side and client-side rendering and avoids the need to call GetJsonAsync. Not really a bug per say, but the new GetFromJsonAsync method is ~20% slower than the GetJsonAsync method in Blazor WASM in my (admittedly extremely primitive) perf testing.I was gonna write up a blog post on the perf improvements after 3.2 Preview 3 dropped, but was surprised to see the significant drop in perf. You can find the corresponding benchmark WasmComparison here: How do I read a JSON file in Blazor WebAssembly? Running the same exact code on Blazor server produces the file in about a second. To do this, we'll create an Index.razor.cs file. You must be joking, ain't you ! Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. This is the type I want the response deserialized into. The learn-blazor site had been created at a point in time when there was no Blazor documentation at all available. @szalapski I can confirm without a doubt that the slowness is with the deserialization and not a system or environment issue. I don't imagine there's any difference between using array and List, etc. protected override async Task OnInitAsync() { DBModel data = await Http.GetJsonAsync&lt;DBModel&gt;(&quot;sample-data/. Follow these steps to read the JSON file. In the following example, the app creates a mobile phone number claim for a user from their AAD user profile's mobile phone number. Well occasionally send you account related emails. @tareqimbasher are you running on Blazor 5? For now we've had to build our own. In the Blazor client-side application, you can call the web APIs using HttpClient service. the JSON file. GetFromJsonAsync (HttpClient, Uri, Type, JsonSerializerOptions, CancellationToken) Sends a GET request to the specified Uri and returns the value that results from deserializing the response body as JSON in an asynchronous operation. @steveharter glTF creation involves the manipulation of. Hopefully you will see a large improvement on Blazor 5. You'll want to avoid creating a string from the content and use a Stream instead. https://github.com/hypar-io/Elements/tree/wasm-perf/Elements.Benchmarks. This article explains how to get the sample working. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. By clicking Sign up for GitHub, you agree to our terms of service and @SamMonoRT could we add it to interpreter benchmarks? Blazor in net5 should be considerably faster. If you face issue with JSON serialization performence , before trying to solve by refatoring your code, please check performeance in another browser, Blazor work realy fast on Edge, Opera, Chrome, but performance in Firefox is realy wick - slowdown serialization more than 10 times. Time to create a Razor component in our Blazor Wasm application. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. While we do our best to look through all the issues filed here, to get a faster response we suggest posting your questions to StackOverflow using the asp.net-core-mvc tag. Therefore, much of the content of learn-blazor isn't necessary anymore and parts of it are outdated. This indicates a likely environmental or systemic issue, and not likely a (de)serialization issue. How can this be achieved then on a Blazor Server based app ? Share server-side and client-side app logic written in .NET. Add a UserInfo.cs class to the app and designate the required user profile properties with the JsonPropertyNameAttribute attribute and the JSON name used by AAD for those properties: The preceding example is for an app that uses AAD authentication with MSAL. This implementation will cause AccessTokenNotAvailableException exception when the user is not signed-in even if the accessing is for an anonymously accessible endpoint. If so, is the only solution to retrieve very small data sets everywhere on my site? (as shown at the beginning of my request), it doesnt have the extension method for executing GetJsonAsync() I recommend setting a reasonable goal for the next release. Blazor Server for production was already available. Nothing significant on the CPU, this is my only focus when I am doing this. Email address is only for further clarification on your FAQ request. but thought I'd ask--anything else we could do to "help" the deserializer along for collections with thousands of items? This indicates a likely environmental or systemic issue, and not likely a (de)serialization issue.". Anyhow, your new code snippet, which you say is working, is actually the first code snippet implemented in two methods, and thus, if it works as two methods, it should work as a single combined method. But i want to do it in synchronous approach, because i need to do route the page after data fetch completed. What is the purpose of a display name in built-in form components? Any new news or suggestions (@szalapski )? When the task completes, continue execution; that is, call UriHelper.NavigateTo('/Dashboard') synchronously. Thanks for contacting us. Or advice how to route a page after data fetch got success. It will not be used for any other purpose. Refer to this documentation for more details. There has been a big push to optimize this further. Our initial benchmarks of rc1 are showing it to be slower in this area than interpreted mode. The following utility classes and configuration are used in each of the following subsections of this article: After adding the Microsoft Graph API scopes in the AAD area of the Azure portal: The scope placeholders "{SCOPE 1}", "{SCOPE 2}", "{SCOPE X}" in the preceding code represent one or more permitted scopes. Well occasionally send you account related emails. With large data sets: Thanks guys, sharing your valuable suggestion. C# Copy How to generate a horizontal histogram with words? Are you running this test from inside VS or from a published build? It looks like this is a question about how to use ASP.NET Core. Our API project is written in .NET 5, but we will explain what is different in the newer version next to each code snippet. Let's create a description of a dynamic component: For example, here we have created a simple employee.json file and read its values in a Razor component. Is it OK to check indirectly in a Bash if statement for exit codes if they are multiple? But, unfortunately I can NOT use the GetJsonAsync() method here, as shown from the GitHub samples I posted an MCVE as answer on StackOverflow, based on the WeatherForecast page. Already on GitHub? After that, provide a project name and click on the Next button. privacy statement. Fastest decay of Fourier transform of function of (one-sided or two-sided) exponential decay. Transient registration is recommended for IHttpClientFactory, which manages its own DI scopes. Foo is actually as follows, with minimal name changes only to protect the proprietary. Transformer 220/380/440 V 24 V explanation. In the following example, the app creates a mobile phone number claim for the user from their AAD user profile's mobile phone number. I just did that comparison to ensure that the download speed is not relevant--regardless of whether the download is 20 ms or 20,000 ms, the deserialization is quite slow. I am having issues with other things being slow as well, and I suspect this issue not strictly related to deserialization. To learn more, see our tips on writing great answers. (FYI, this is on Blazor 3.2.0; I also updated System.Text.Json via NuGet to v 5.0.0-preview.7, but it didn't help much. This is how it should be, though I would design my code much differently. It is expected to be included as part of the BCL in an upcoming .NET 5 preview. Change to Async\Stream mode as mentioned earlier. Sign in This is your code, a copy of your code, which is why it is "("Dashboard")" instead of "("/Dashboard")". But in Firefox the same deserialization took ~35 seconds! Wait times for data loads of this size (they really aren't massive payloads delivered from the API) are at the point where it is difficult to satisfy users and Server Side Blazor is becoming the only option. public async Task<List<YourDataModel>> GetMyDataAsync () { return await _httpClient.GetJsonAsync<List<YourDataModel>> (pathToYourJsonFileHere)} In your startup.cs file, modify the ConfigureServices method: //DI for HttpClient if (!services.Any (x => x.ServiceType == typeOf (HttpClient))) { services.AddSingleton<HttpClient> (); //DI for your service Yes, Intel Core i5 8350-U with 16 GB RAM. No problems, very similar timings. @inject HttpClient Httpclient <button @onclick="@GetData">Get Data</button> @code { private async Task GetData . We can write both client-side and server-side code in C#.NET itself. This doesn't seem right to me. I have powerful dev machine. Yes this will allow the deserializer to start before all of the data is read from the Stream and prevent the string alloc. Performance Vs System.Text.Json is impressive. It is taking 2 seconds. This also includes a "polymorphic" mode due to using System.Object that causes deserialization to be much slower (almost 2x) than without it. Why can we add/substract/cross out chemical equations for Hess law? I have commented out anything bound to Results to simplify, and instead I just have an indicator bound to IsLoading. I just copy paste your code, and said that there is nothing wrong with it. "Both Newtonsoft and STJ are slow. Would a deserialization of a few megabytes take 10-30 s? The Large object graph benchmark section in #40318 has deserialization perf of 372ms for a string of length 322K. However, scope of our WASM app is definitely expanding and we have users looking to handle 100s of thousands of of objects to perform data manipulation/analysis in browser like Excel would chomp through on a normal desktop. How do I validate a nested complex model in Blazor? Page restricted and some time after only data assigned specified parameter, Finally, i solve this issue by following way in my project. Thanks for contributing an answer to Stack Overflow! For example, pass the User.Read scope to AddGraphClient for the examples in the following sections of this article: This section uses the utility classes (GraphClientExtensions.cs) described earlier in this article. Maybe it's my misunderstanding of how serialisation works - is it object construction in .Net itself being slow here and I shouldn't see any difference between AOT and interpreted builds? Thanks, though. I established a small benchmark that creates 1000 cubes using the library (the library is for creating 3d stuff with lots of Vector3 structs and Polygon), serializes them to JSON, then writes the resulting 3D model to glTF. Note: Compare this with the one-liner httpClient.GetFromJsonAsync<Stock>(url); This outputs: Stock VTSAX (MutualFund) = 107. GET from JSON (GetFromJsonAsync) GetFromJsonAsyncsends an HTTP GET request and parses the JSON response body to create an object. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. The text was updated successfully, but these errors were encountered: UriHelper.NavigateTo is called only after the GetJsonAsync is completed. public class ApiResponse { public int offset { get; set; } public int total { get; set; } public NameRec [] names { get; set; } } public class NameRec { public string name { get; set; } } ps. The initial release target is to ship this as a standalone NuGet package at Build, alongside Blazor, which will utilise the APIs. More info about Internet Explorer and Microsoft Edge, Package consumption workflow (NuGet documentation), Call Graph API from a component using the Graph SDK, Customize user claims with Graph API and a named client, Utility base component classes to manage a DI scope, Detect transient disposables in Blazor WebAssembly apps. @szalapski could you please try your timings with the a published app outside of VS? We moved to MessagePack . Connect and share knowledge within a single location that is structured and easy to search. Is there any certain types or techniques that could speed this up? System.Net.Http.Json 's HttpClient extension methods such as GetFromJsonAsync () greatly simplifies the routine codes to retrieve json objects from a web API. Here is a similar call in a Blazor page: Why does Q1 turn on and Q2 turn off when I apply 5 V? Here we will create a new project using Blazor WebAssembly App and .Net 6.0. Step 1 Step 2 In this step we will select " Blazor WebAssembly App " project type. As you can see from the code, I've passed a type parameter to the GetJsonAsync method. Have a question about this project? RestClient.Net can do that in Blazor without the extra step. The following GraphExample component uses an injected GraphServiceClient to obtain the user's AAD profile data and display their mobile phone number: This section uses the utility classes (GraphClientExtensions.cs) described earlier in this article. Since then, the framework has grown and matured a lot. My controller in this example is returning an IEnumerable which is just a WeatherForecast[] (ordinary array) underneath. deserialization to an array of Customers. Have a question about this project? Job DescriptionRole - Technology LeadTechnology -.Net, Blazor WebAssemblyLocation - StockholmSee this and similar jobs on LinkedIn. In blazor client side application, can read and data from json file async way. Oh, yeah, stop here and wait for the task to finish !!! What is an EditContext and how do I define and use it in a form? :). As per below documentation, i have used route as ("Dashboard"), https://docs.microsoft.com/en-us/aspnet/core/blazor/routing?view=aspnetcore-3.0#uri-and-navigation-state-helpers, Blazor - How to read .json file in client side synchronous way or have any callback function for Http.GetJsonAsync method. Is any callback handler available for achieve my case? Does the 0m elevation height of a Digital Elevation Model (Copernicus DEM) correspond to mean sea level? Is WebAssembly really that slow at deserializing? Await = stop here and wait for the task to finish and return the result (if any).

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