@lewing Do you mean just System.Text.Json should be faster? It indeed takes 7-12 seconds to return 17000 items (about 1.6 MB) of WeatherForecast. Both are fast with small payloads. [wwwroot/employee.json] Blazor Server and Blazor WebAssembly. Making location easier for developers with new data primitives, Stop requiring only one assertion per unit test: Multiple assertions are fine, Mobile app infrastructure being decommissioned. Is there any certain types or techniques that could speed this up? 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 do hope that you're not the presenter in the video. In this crash course, we build an actual Blazor WebAssembly application based on .NET 5. Our initial attempts to compile and run web assembly from our library in .NET 6 preview 7 have been met with massive performance degradation. @rajeshaz09 I assume you've measured against 5.0 .NET since there have been gains. https://www.youtube.com/watch?v=2moh18sh5p4. First, and most importantly, thanks to the team working on Blazor and web assembly. Sign in How can I diagnose that? That is a serious problem for me FYI: I am using .NET 6 Preview 3 and System.Text.Json, I have had a similar journey recently moving through different serialisers and finally arriving at Messagepack which has been good enough in interpreted WASM for current users. For example, here we have created a simple employee.json file and read its values in a Razor component. Microsoft Graph SDKs are designed to simplify building high-quality, efficient, and resilient applications that access Microsoft Graph. The examples in this section require a package reference for Microsoft.Extensions.Http for the standalone or Client app. Why can we add/substract/cross out chemical equations for Hess law? 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. 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. (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. 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. Please do it if you can, so that I'll be sure that I need some practice, or just remove the link. Already on GitHub? The green is the download and the orange is "perform microtasks", which I assume means WebAssembly work. After adding the Microsoft Graph API scopes in the AAD area of the Azure portal: Add the following GraphClientExtensions.cs class to the standalone app or Client app of a hosted Blazor WebAssembly solution. Sunday, October 13, 2019 7:23 PM text/sourcefragment 10/16/2019 1:57:00 PM Anonymous 0 Doesn't solve the issue but from https://twitter.com/JamesNK/status/1310875638585204738 it looks like gRPC is a lot faster to deserialize: I wrote a Blazor WebAssembly app that shows the performance benefits of gRPC-Web compared to JSON. This is the type I want the response deserialized into. To learn more, see our tips on writing great answers. Why shouldn't it be on the order of tens of milliseconds? Transformer 220/380/440 V 24 V explanation. Solution 2. How to use Jackson to deserialise an array of objects, Best way to get consistent results when baking a purposely underbaked mud cake. When you 'll create a blazor project then you 'll have to choose blazor server app. implemented as next: And the service which hides the external API-call is implemented as next: So Im using the regular GetStringAsync() method on the created http client instance which returns But in Firefox the same deserialization took ~35 seconds! This implementation will cause AccessTokenNotAvailableException exception when the user is not signed-in even if the accessing is for an anonymously accessible endpoint. Thanks for contacting us. So download time went from 1-6 seconds for 2-6MB to 20ms for 1.6MB -- any thought on why that's the case? Here we will create a new project using Blazor WebAssembly App and .Net 6.0. I'm using Blazor 3.2.0 with System.Text.Json 5.0.0-preview.7. You should have not try to belittle me just in order to post this video. I will try it on Blazor 5 preview 8 soon. You signed in with another tab or window. You are saying that I have a problem that is not inherent to deserializing in WebAssembly? Well occasionally send you account related emails. Job DescriptionRole - Technology LeadTechnology -.Net, Blazor WebAssemblyLocation - StockholmSee this and similar jobs on LinkedIn. Running the same exact code on Blazor server produces the file in about a second. Use the HttpClient class with the GetFromJsonAsync () method to read a JSON file in Blazor WebAssembly. In the following custom user account factory, the framework's RemoteUserAccount represents the user's account. Use the HttpClient class with the GetFromJsonAsync() method to read a JSON file in Blazor WebAssembly. Connect and share knowledge within a single location that is structured and easy to search. 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. It's a pleasure to use. In the following component code, the todoItemsare displayed by the component. We can call methods in our library that do some pretty complicated geometry stuff and they run at near native speed. With large data sets: The Blazor team has created a BrowserHttpMessageHandler and it handles interop between .NET and the JavaScript fetch API. Similar patterns exist for OIDC and API authentication. the JSON file. Cut and paste everything inside the @code block to the new file. We will call it Create.razor. 2022 Moderator Election Q&A Question Collection. empList = await Http.GetJsonAsync<Employee []> ("api/Employee"); Note the removal of the leading "/" in the url. System.Text.Json should be ~2x faster for deserialization than Newtonsoft so it would be good to see your object model to see if you hit an area that is slow on STJ. It looks like there is an issue where the runtime is always initialized in debug mode when run from inside VS. Additionally if you update the app from 3.2 to 5.0 there are several interpreter optimizations and library improvements. 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. https://github.com/hypar-io/Elements/tree/wasm-perf/Elements.Benchmarks. Any new news or suggestions (@szalapski )? In VS2019 (Version 16.3.8) for ordering pizzas. If so, is the only solution to retrieve very small data sets everywhere on my site? So we can not realize our application with Blazor. Wait, I thought all agreed that the slowness is in the deserialization code, not in a problem with my system or environment. Describe the bug. The performance is so poor that I am still skeptical that this is just a slow area--I still suspect that something is wrong with the way I am doing it. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. This is where we populate a form with our Team entity, which includes name, shirt colour and location. You can find the corresponding benchmark WasmComparison here: Share server-side and client-side app logic written in .NET. What is the deepest Stockfish evaluation of the standard initial position that has ever been done? What is the purpose of a display name in built-in form components? This doesn't seem right to me. So, my question is quit obvious, how can I have the same behavior in my Blazor Server based app, because there are no Microsoft.AspNetCore.Blazor dependencies in my Blazor Server based app, as you can see next: And because my PizzaMenuService lives in the Services folder of my Blazor Server app and makes the call to the Rest API Here is a similar call in a Blazor page: 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 Note: Compare this with the one-liner httpClient.GetFromJsonAsync<Stock>(url); This outputs: Stock VTSAX (MutualFund) = 107. In chrome the deserialization took took ~4 seconds (that's actually "good enough" for me, at least right now) In Program.cs, configure the named HttpClient for Graph API: In the preceding example, the GraphAPIAuthorizationMessageHandler DelegatingHandler is registered as a transient service for AddHttpMessageHandler. This indicates a likely environmental or systemic issue, and not likely a (de)serialization issue.". Therefore, much of the content of learn-blazor isn't necessary anymore and parts of it are outdated. Running it from Visual Studio, "run without debugging" in Release configuration. As discussed in #40318, due to current Blazor architecture, there is an expected perf hit that has a wide range depending on the exact scenarios, but ~35x slower than Core is a rough number that is in line with expectations. How can I pretty-print JSON in a shell script? Already on GitHub? How do I read a JSON file in Blazor WebAssembly? If you have write-permissions please help me learn by adding exactly one area label. I have commented out anything bound to Results to simplify, and instead I just have an indicator bound to IsLoading. In your Blazor app use this code to automatically deserialize: await Http.GetFromJsonAsync<ComponentDto>(.) gRPC deserialization is 10 times faster, Check it out here: https://grpcblazorperf.azurewebsites.net. 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. I just copy paste your code, and said that there is nothing wrong with it. Do you get it ? We have an .NET open source library that is used heavily in back end services run on AWS Lambda. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. If so I think that should be next. By clicking Sign up for GitHub, you agree to our terms of service and I see that MessagePack claims to be ~13x faster deserializing than Json.NET (no benchmark for STJ) for the case of "large array of simple objects". Customize user claims with the Graph SDK. It took around 13 seconds to get 53,000 weather forecasts in v 3.1 but 7 seconds in 5.0.0-rc1. Have a question about this project? This video is part of The FREE Blazor Crash Course. That model is simple and should be fast (no System.Object, non-generic collections or custom converters that could slow it down). glTF creation involves the manipulation of. Well occasionally send you account related emails. I advice you to take some time to learn more about async/await. Yes, I used the extensions, but when I saw they were slow, I refactored to the code above so I could narrow the issue down to serialization. In the following example, the app creates a mobile phone number claim for a user from their AAD user profile's mobile phone number. builder.Services.AddSingleton<ProfileService> (); Now when the user accesses this in the browser they will get a single instance of this service until they refresh their browser. 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). 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. The GetFromJsonAsync method is used to get the parsed Json data. Is this just slow deserialization in ReadFromJsonAsync (which calls System.Text.Json.JsonSerializer.Deserialize internally), or is there something else going on here? I've been having similar issues. If you are using the net5.0 you should look at the System.Net.Http.Json extensions. In the Blazor client-side application, you can call the web APIs using HttpClient service. Thanks. Consuming REST APIs. I assume no attempt to run on Blazor 5.0 yet? to your account. 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. Create or load a JSON file under the wwwroot folder. Have a question about this project? I will try it on Blazor 5 preview 8 soon. Our API project is written in .NET 5, but we will explain what is different in the newer version next to each code snippet. Memory\CPU. @tareqimbasher are you running on Blazor 5? Blazor is a free and open-source web framework that enables developers to create web apps using C# and HTML. Asking for help, clarification, or responding to other answers. Create the following class and project configuration for working with Graph API. Why so many wires in my old light fixture? Now open Visual Studio 2022 and follow the below steps. I did start with a stream per the code just above --that was how I found this issue. Different hardware and\or different Blazor versions could account for that 2x-3x slowness; would need a standard CPU benchmark and same Blazor version to actually compare apples-to-apples. But I can see significant gap if I use Balanced/PowerSaver setting. 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. This is how it should be, though I would design my code much differently. GET from JSON (GetFromJsonAsync) GetFromJsonAsyncsends an HTTP GET request and parses the JSON response body to create an object. Create rich interactive UIs using C# instead of JavaScript. 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. The requested data as a json-string which is finally deserialized to the required object-type. protected override async Task OnInitAsync() { DBModel data = await Http.GetJsonAsync<DBModel>("sample-data/. As Im currently evaluating Blazor (Server) I made a simple POC application gRPC network usage is 70% smaller 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. The examples in this section require package references for the standalone or Client app: For guidance on adding packages to .NET apps, see the articles under Install and manage packages at Package consumption workflow (NuGet documentation). The common methods include: GetFromJsonAsync: Sends an HTTP GET request and parses the JSON response body to create an object. 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. The Large object graph benchmark section in #40318 has deserialization perf of 372ms for a string of length 322K. You'll see some build errors and will need to resolve some dependencies. "Both Newtonsoft and STJ are slow. Find centralized, trusted content and collaborate around the technologies you use most. It is taking 2 seconds. This tells me there's no slowness in updating the DOM or rendering. Is it OK to check indirectly in a Bash if statement for exit codes if they are multiple? protected override async Task OnInitializedAsync() { image = await http.GetFromJsonAsync<Data.Image>("api/image"); } Wait, what is that http reference? How to add custom validation in Blazor using custom validation attribute? The GetJsonAsync() method is an extension method for HttpClient, but it looks like what you are really trying to achieve here is one level of abstractiobn higher - i.e. Making statements based on opinion; back them up with references or personal experience. We are developing a blazor wasm application and deserializing a ~1.8 MB JSON payload takes about 5-6 seconds (time to complete network request is not part of that time). Some are in preview7 some are in later builds. This performance degradation is not everywhere. To do this, we'll create an Index.razor.cs file. You'll want to avoid creating a string from the content and use a Stream instead. We have the exact same problem. This article explains how to use Microsoft Graph API, which is a RESTful web API that enables apps to access Microsoft Cloud service resources. We use several third party dlls that we had to compile with .NET 6 as well to even get the publishing of the Blazor project to work. How to generate a horizontal histogram with words? PostAsJsonAsync: Sends a POST request to the specified URI containing the value serialized as JSON in the request body. What is a good way to make an abstract board game truly alien? Since then, the framework has grown and matured a lot. 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. By clicking Sign up for GitHub, you agree to our terms of service and Can an autistic person with difficulty making eye contact survive in the workplace? The text was updated successfully, but these errors were encountered: UriHelper.NavigateTo is called only after the GetJsonAsync is completed. Interested to see how your times would change when you try it on Blazor 5 preview 8! 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. - limit attaching the access token to only URLs under the specified subpath. It's just serialization and reading/writing bytes that seem to be a big issue. ), (also, I tried to increase the payload to 5 MB and that took 23-27 seconds.).
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