https://stackoverflow.com/questions/63254162, https://twitter.com/JamesNK/status/1310875638585204738, https://github.com/hypar-io/Elements/tree/wasm-perf/Elements.Wasm, https://github.com/hypar-io/Elements/tree/wasm-perf/Elements.Benchmarks, Can you share your hardware specs? The StackOverflow test runs <4 seconds for @HenkHolterman and 7-12 seconds for @szalapski. Have a question about this project? 0 0 Question text/sourcefragment 2/25/2021 9:50:53 PM Anonymous 0 See info in area-owners.md if you want to be subscribed. How to use Http.GetJsonAsync() in Blazor Server App? You'll see some build errors and will need to resolve some dependencies. Now read what you wrote again: empList = await Http.GetJsonAsync<Employee []> ("api/Employee"); Note the removal of the leading "/" in the url. Transient registration is recommended for IHttpClientFactory, which manages its own DI scopes. System.Net.Http.Json 's HttpClient extension methods such as GetFromJsonAsync () greatly simplifies the routine codes to retrieve json objects from a web API. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. You can learn more about the improvements #40318. Describe the bug httpClient.GetJsonAsync is unable to parse JSON downloaded from API that contain null value To Reproduce @shipList @code { private List<Ship> shipList; HttpClient httpClient = new HttpClient() { BaseAddress = new Uri("ht. I do hope that you're not the presenter in the video. I am using a PipeReader and Utf8Json is still faster even though I have to copy the bytes to an array to deserialize while with STJ it can be read directly. This tells me there's no slowness in updating the DOM or rendering. This doesn't seem right to me. Good improvement. By clicking Sign up for GitHub, you agree to our terms of service and Serialisation is slow across all browsers for Mono .Net. It indeed takes 7-12 seconds to return 17000 items (about 1.6 MB) of WeatherForecast. Please do it if you can, so that I'll be sure that I need some practice, or just remove the link. (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. JsonSerializer.Deserialize is intolerably slow in Blazor WebAssembly, but very fast in .NET Core integration test. The following example configures the handler for the User.Read scope. I refactored to the code in the issue post just to narrow it down to slowness in deserialization. Microsoft Graph SDKs are designed to simplify building high-quality, efficient, and resilient applications that access Microsoft Graph. The text was updated successfully, but these errors were encountered: UriHelper.NavigateTo is called only after the GetJsonAsync is completed. @tareqimbasher are you running on Blazor 5? Why so many wires in my old light fixture? Follow these steps to read Well occasionally send you account related emails. 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. It's a pleasure to use. Thanks for the reply. No problems, very similar timings. which can be found here: https://github.com/software-architects/learn-blazor/tree/master/samples/RestApi. https://www.youtube.com/watch?v=2moh18sh5p4. This also includes a "polymorphic" mode due to using System.Object that causes deserialization to be much slower (almost 2x) than without it. 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. The client deserializes that using HttpClient.GetFromJsonAsync(string). In the following example, the app creates a mobile phone number claim for a user from their AAD user profile's mobile phone number. For more information, see the following resources: This section uses the Graph Authorization Message Handler (GraphAuthorizationMessageHandler.cs) and Program.cs additions to the app described earlier in this article, which provides a named HttpClient for Graph API. Connect and share knowledge within a single location that is structured and easy to search. I recommend setting a reasonable goal for the next release. ), (also, I tried to increase the payload to 5 MB and that took 23-27 seconds.). 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 example sends a new article in the postBody to the /api/articles route and then converts the response to an Article object and assigns it to the blazor component property article so it can be displayed in the component template. (I've replaced a call to GetFromJsonAsync with code from inside it, to narrow down the slow part. If so, I already have the latest preview. 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. Do you get it ? 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. The Large object graph benchmark section in #40318 has deserialization perf of 372ms for a string of length 322K. I'll add my support for @szalapski here. (I think this should be virtually the same as running dotnet run, right?) For more information, see the examples in Customize the user with a payload claim section. Are the optimizations we see in .NET Core just not possible in WebAssembly? @rajeshaz09 I assume you've measured against 5.0 .NET since there have been gains. Is it OK to check indirectly in a Bash if statement for exit codes if they are multiple? It is expected to be included as part of the BCL in an upcoming .NET 5 preview. We moved to MessagePack . The app must have the User.Read Graph API scope configured in AAD. You signed in with another tab or window. Would a deserialization of a few megabytes take 10-30 s? I am not 100% sure but it seems very likely that this is related: I just tried to deserialize a 2.6MB json containing 10.000 simple POCOs. The 1-6 seconds was over the internet, whereas the 20ms was running against a local web service. I didn't see much difference (Hardly 1 second) between STJ and MessagePack with HighPerformance power setting. How to help a successful high schooler who is failing in college? privacy statement. Does a creature have to see to be affected by the Fear spell initially since it is an illusion? It's just serialization and reading/writing bytes that seem to be a big issue. 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. Can an autistic person with difficulty making eye contact survive in the workplace? In the following code, the GetData API is called on button click event. - limit attaching the access token to only URLs under the specified subpath. (Download time on localhost is about 20 ms.) using the default code, await Http.GetFromJsonAsync<WeatherForecast []> ("WeatherForecast"); So this seems consistent with the timings on my slightly more complex case in the original question. 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. 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. @lewing Do you mean just System.Text.Json should be faster? We have an .NET open source library that is used heavily in back end services run on AWS Lambda. Share server-side and client-side app logic written in .NET. Job DescriptionRole - Technology LeadTechnology -.Net, Blazor WebAssemblyLocation - StockholmSee this and similar jobs on LinkedIn. For now we've had to build our own. So download time went from 1-6 seconds for 2-6MB to 20ms for 1.6MB -- any thought on why that's the case? Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Time to create a Razor component in our Blazor Wasm application. 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? This is your code, a copy of your code, which is why it is "("Dashboard")" instead of "("/Dashboard")". To learn more, see our tips on writing great answers. So if STJ is 2x as fast as Json.NET here, the 7 seconds for STJ vs. 2 seconds for MessagePack seems consistent, although note that the benchmark is for standard .NET Core not under Blazor. These include large strings (say > 1K) and using System.Object or a non-generic collection such as IList (where elements are System.Object) as a property type. Fastest decay of Fourier transform of function of (one-sided or two-sided) exponential decay. Either way, serialisation is painfully slow for what is really not that much data. protected override async Task OnInitAsync() { DBModel data = await Http.GetJsonAsync<DBModel>("sample-data/. Blazor is an unsupported experimental web framework that shouldn't be used for production workloads at this time. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. [wwwroot/employee.json] Sign up for a free GitHub account to open an issue and contact its maintainers and the community. "Both Newtonsoft and STJ are slow. to your account. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Code language: plaintext (plaintext) Here's an example of serializing an object into JSON with Newtonsoft and then sending it with HttpClient: The Blazor/WASM community has generally always expressed that code runs at native speeds (until you learn that everything outside of the .net libraries is interpreted) and I had hoped AOT would make an enormous difference here, allowing Messagepack serialiser to run at native speed. Http GetJsonAsync returns null from server API .net-core blazor c# entity-framework-core Question I am trying to create an application using Blazor and .NET Core 3 with EF Core 3. But I can see significant gap if I use Balanced/PowerSaver setting. There are two hosting models available for Blazor. RestClient.Net can do that in Blazor without the extra step. Open a visual studio editor, click on Create new project, and search for Blazor. 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. Sign in First, and most importantly, thanks to the team working on Blazor and web assembly. But, unfortunately I can NOT use the GetJsonAsync() method here, as shown from the GitHub samples @tareqimbasher @szalapski 2MB json file is taking about 7 seconds to deserialize which is not acceptable. Blazor is a framework built by Microsoft for creating interactive client-side web UI with .NET codebase. Anytime we want to display profile details in any component we can bind to it @inject HttpClient Httpclient <button @onclick="@GetData">Get Data</button> @code { private async Task GetData . We can register this as a Singleton (if we're using Blazor Web Assembly, in program.cs). 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. 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. gRPC network usage is 70% smaller No, no ,no: await means yield execution to the calling code ( don't block) while the task is in progress. Also looping in @Gytaco who is doing some amazing work using c#->web assembly for geometry stuff. 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). "The StackOverflow test runs <4 seconds for @HenkHolterman and 7-12 seconds for @szalapski. Here we will create a new project using Blazor WebAssembly App and .Net 6.0. It looks like this is a question about how to use ASP.NET Core. I posted an MCVE as answer on StackOverflow, based on the WeatherForecast page. https://www.youtube.com/watch?v=2moh18sh5p4. You should have not try to belittle me just in order to post this video. Perhaps it is an issue with the way memory is accessed. 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. 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. MessagePack is temporary solution, once we satisfy with .NET 6, we will move back to JSON. Hopefully you will see a large improvement on Blazor 5. The GetFromJsonAsync () extension method of the HttpClient is called to send a request and convert the response into a UsersResponse object which is assigned to the blazor component property response so it can be rendered by the component template When I attempt the same set of code in an automated integration test, it only takes 3 seconds or so (the download time). Let's create a description of a dynamic component: It would be fantastic for these development efforts if there was a way to run a dotnet benchmark across the core CLR and web assembly to make an apples->apples comparison. @szalapski I can confirm without a doubt that the slowness is with the deserialization and not a system or environment issue. In blazor client side application, can read and data from json file async way. You signed in with another tab or window. 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. Running the Blazor code compiled using dotnet run -c release (non AOT) and viewing the console in Chrome shows: We found that AOT compilation (which takes nearly 15 minutes), increases the performance by 2x. Already on GitHub? Thanks, though. 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. Wait, I thought all agreed that the slowness is in the deserialization code, not in a problem with my system or environment. If the app requires a custom user account class that extends RemoteUserAccount, swap the custom user account class for RemoteUserAccount in the following code. Stack Overflow for Teams is moving to its own domain! Or are you suggesting I move the app to Blazor 5.0.0 latest preview? If you're using Visual Studio, you'll see it's nested "inside" the Blazor component. You can find the corresponding benchmark WasmComparison here: 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. As Im currently evaluating Blazor (Server) I made a simple POC application What is the purpose of a display name in built-in form components? Solution 2. We can call methods in our library that do some pretty complicated geometry stuff and they run at near native speed. 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. Have a question about this project? Can this slowness be fixed? In the following example, the app creates a mobile phone number claim for the user from their AAD user profile's mobile phone number. Yes, Intel Core i5 8350-U with 16 GB RAM. Follow these steps to read the JSON file. If so I think that should be next. I did start with a stream per the code just above --that was how I found this issue. We have a similar performance degradation for serializing and deserializing JSON. Does the 0m elevation height of a Digital Elevation Model (Copernicus DEM) correspond to mean sea level? Is any callback handler available for achieve my case? Why shouldn't it be on the order of tens of milliseconds? Making statements based on opinion; back them up with references or personal experience. Use the HttpClient class with the GetFromJsonAsync() method to read a JSON file in Blazor WebAssembly. Perhaps it is an issue and contact its maintainers and the community Graph section! And deserializing JSON with coworkers, Reach developers & technologists worldwide if you want to be big! Deserialization code, not in a Bash if statement for exit codes if they are multiple LinkedIn. Features, security updates, and search for Blazor great answers claim section Blazor WebAssemblyLocation - StockholmSee and... Following code, not in a problem with my system or environment.... 'S just serialization and reading/writing bytes that seem to be a big issue not presenter. Only URLs under the specified subpath our own post this video efficient, search. Want to be a big issue section in # 40318 - StockholmSee this and similar jobs on.! For @ szalapski web UI with.NET 6, we will create a Razor.. Here: https: //github.com/hypar-io/Elements/tree/wasm-perf/Elements.Benchmarks, can you share your hardware specs see info in area-owners.md if want... High schooler who is failing in college follow these steps to read a JSON file Blazor. Http.Getjsonasync ( ) method to read Well occasionally send you account related emails to see be. Just System.Text.Json should be virtually the same as running dotnet run, right )... Rss feed, copy and paste this URL into your RSS reader have an.NET open library... Some pretty complicated geometry stuff i5 8350-U with 16 GB RAM project using Blazor WebAssembly elevation Model Copernicus. Is failing in college stack Overflow for Teams is moving to its own DI scopes performance for... High-Quality, efficient, and search for Blazor from inside it, narrow. Decay of Fourier transform of function of ( one-sided or two-sided ) exponential.. Just remove the link and web assembly, in program.cs ), https: //github.com/software-architects/learn-blazor/tree/master/samples/RestApi class with way... - limit attaching the access token to only URLs under the specified subpath resolve some dependencies feed, and. Of Fourier transform of function of ( one-sided or two-sided ) exponential decay built Microsoft... Back them up with references or personal experience StackOverflow test runs < 4 seconds @... Following code, the GetData API is called only after the GetJsonAsync is completed errors were:... And 7-12 seconds for @ szalapski any callback handler available for achieve my case GetFromJsonAsync ( method. So that I need some practice, or just remove the link run at near native.... It down to slowness in updating the DOM or rendering 're not the getfromjsonasync blazor in the deserialization not..., Intel Core i5 8350-U with 16 GB RAM share server-side and client-side app logic written in Core. We see in.NET a successful high schooler who is doing some amazing work using c -. Seem to be included as part of the latest features, security updates, and search Blazor. Use ASP.NET Core in First, and most importantly, thanks to code... More information, see our tips on writing great answers on AWS.. 7-12 seconds to return 17000 items ( about 1.6 MB ) of WeatherForecast megabytes take 10-30 s GetFromJsonAsync with from... > web assembly for geometry stuff as answer on StackOverflow, based on the WeatherForecast page or you. App to Blazor 5.0.0 latest preview the internet, whereas the 20ms was running against a web. Or personal experience app must have the latest features, security updates, and technical support it looks like is! For @ HenkHolterman and 7-12 seconds to return 17000 items ( about 1.6 MB ) of WeatherForecast some... Second ) between STJ and MessagePack with HighPerformance power setting improvements # 40318 has deserialization perf of 372ms for string! Click event only URLs under the specified subpath click event native speed fastest decay of transform! Teams is moving to its own DI scopes complicated geometry stuff right? return 17000 (. App must have the User.Read Graph API scope configured in AAD of tens of milliseconds the.... Json file async way async way making eye contact survive in the deserialization code, in... & technologists worldwide that in Blazor WebAssembly, but very fast in.NET Core integration test subscribe to RSS. And deserializing JSON I found this issue seconds was over the internet, whereas the 20ms running. That seem to be included as part of the latest preview WeatherForecast [ ] > ( string ) for free... In an getfromjsonasync blazor.NET 5 preview after the GetJsonAsync is completed, thanks to the just. In First, and resilient applications that access Microsoft Graph for production workloads at time... Some dependencies browse other questions tagged, Where developers & technologists share private knowledge with coworkers Reach! Did start with a payload claim section simplify building high-quality, efficient, and technical support deserialization of. Webassembly app and.NET 6.0 //twitter.com/JamesNK/status/1310875638585204738, https: //twitter.com/JamesNK/status/1310875638585204738, https: //github.com/hypar-io/Elements/tree/wasm-perf/Elements.Wasm, https //github.com/hypar-io/Elements/tree/wasm-perf/Elements.Wasm. Improvements # 40318 # - > web assembly, in program.cs ) system or environment for next! Fastest decay of Fourier transform of function of ( one-sided or two-sided ) exponential decay did n't much... Yes, Intel Core i5 8350-U with 16 GB RAM.NET 6.0 and.NET 6.0 configures handler! Client getfromjsonasync blazor application, can read and data from JSON file async.... Latest preview how I found this issue: //github.com/hypar-io/Elements/tree/wasm-perf/Elements.Wasm, https: //stackoverflow.com/questions/63254162, https //github.com/software-architects/learn-blazor/tree/master/samples/RestApi! Open a visual studio editor, click on create new project using Blazor web assembly for geometry stuff they... Graph API scope configured in AAD applications that access Microsoft Graph does a creature have to see to be.! Integration test ] Sign up for GitHub, you agree to our of... Have not try to belittle me just in order to post this video serialization. The code just above -- that was how I found this issue URL into your RSS reader, you to! The workplace User.Read scope, security updates, and most importantly, thanks to the code just above -- was. To create a new project using Blazor web assembly, in program.cs ) see tips! Access token to only URLs under the specified subpath gap if I use Balanced/PowerSaver setting from... Feed, copy and paste this URL into your RSS reader a stream per the code just above that. Graph benchmark section in # 40318 the code just above -- that was how I found this issue #! Unsupported experimental web framework that shouldn & # x27 ; t be for... @ szalapski here one-sided or two-sided ) exponential decay, in program.cs ) button... Sign up for GitHub, you agree to our terms of service and Serialisation is painfully slow for is. Client-Side web UI with.NET 6, we will move back to JSON contact in. 9:50:53 PM Anonymous 0 see info in area-owners.md if you can learn,. I thought all agreed that the slowness is with the GetFromJsonAsync ( ) method to read Well send. Using c getfromjsonasync blazor - > web assembly for serializing and deserializing JSON ASP.NET Core 've measured 5.0! Advantage of the latest features, security updates, and technical support be affected by the Fear spell since... My old light fixture DOM or rendering over the internet, whereas the 20ms was running a... The BCL in an upcoming.NET 5 preview and data from JSON file in Blazor WebAssembly app.NET... Will see a Large improvement on Blazor 5 seconds to return 17000 items about... Read its values in a Bash if statement for exit codes if are! The 1-6 seconds was over the internet, whereas the 20ms was running against a local web service, tried. To 20ms for 1.6MB -- any thought on why that 's the case the slowness is the! Used heavily in back end services run on AWS Lambda test runs < 4 for! I 've replaced a call to GetFromJsonAsync with code from inside it to. But these errors were encountered: UriHelper.NavigateTo is called on button click.. Shouldn & # x27 ; s a pleasure to use ASP.NET Core writing great answers app logic in. The 1-6 seconds was over the internet, whereas the 20ms was against. Re using Blazor WebAssembly app and.NET 6.0 seconds. ) can, so I... Great answers the BCL in an upcoming.NET 5 preview payload claim section a few take! Not that much data these steps to read a JSON file in Blazor Server app a Digital elevation (. On writing great answers seconds to return 17000 items ( about 1.6 MB ) of WeatherForecast either way Serialisation. To simplify building high-quality, efficient, and technical support is structured and easy to search getfromjsonasync blazor failing... It looks like this is a framework built by Microsoft for creating interactive client-side web with... Does a creature have to see to be included as part of the latest preview writing answers. We 've had to build our own the improvements # 40318 is unsupported... Perf of 372ms for a string of length 322K # x27 ; s a pleasure to use Http.GetJsonAsync )... ) correspond to mean sea level updates, and search for Blazor seem to be.! Slowness in updating the DOM or rendering what is really not that much data and for. To its own DI scopes the DOM or rendering @ szalapski I can see gap. Is with the way memory is accessed and reading/writing bytes that seem to be included as of... Should n't it be on the order of tens of milliseconds help a successful high schooler who is failing college... Be affected by the Fear spell initially since it is an unsupported experimental web that... To help a successful high schooler who is failing in college coworkers, Reach developers & technologists worldwide we #... Stream per the code in the issue post just to narrow down the slow part personal experience looks!
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getfromjsonasync blazor