Entity framework first query takes long time

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August undefined, 2024

WebHowever, I profiled the performance and Entity Framework is too slow. (My app processes 2 messages in about 1.2 seconds, where the (legacy) app that I am re-writing does 5-6 messages in the same time. (The legacy app calls sprocs for its DB Access.) My profiling points to Entity Framework taking the bulk of the time per message. WebFeb 1, 2013 · ADO.NET Entity Framework and LINQ to ... Then you would lets say execute each query once and each of the queries would take a long time; Then you would run each query a second time and each would take seconds. ... for one form or query pulling down the same amount of data from the database and see if that gives the same amount …

Efficient Querying - EF Core Microsoft Learn

WebMar 9, 2024 · If a certain query is taking too much time (e.g. because an index is missing), this can be seen discovered by inspecting command execution logs and observing how … WebJan 16, 2024 · It's hard to know why it takes 500ms because they might have several reasons. (dbContext as IObjectContextAdapter).ObjectContext. Doing it mean the OnModelCreating method will be invoked, and the model will be compiled for the first time. Some query will be executed on the database as well. honeysweet plum latin name

entity framework - DbContext is very slow when adding and deleting ...

WebOct 31, 2014 · DbContext is very slow when adding and deleting. When using DbContext in a database-first scenario I found out that adding and deleting entities is very slow compared to ObjectContext. If adding 2000 entities and saving the changes at the end, DbContext is 3 to 5 times slower than ObjectContext (btw.: I know that adding a large … WebDec 3, 2012 · Now, I have roughly 50k Items and only 100 ItemGroups. If I execute a context.Items.ToList (), using SQL Profiler, the duration is around 2-3 seconds which is completely acceptable. If, however, I want to load the ItemGroups at the same time using context.Items.Include ("ItemGroup").ToList (), the execution time jumps up to around 12 … WebOct 8, 2010 · Regarding the Entity Framework, the first time you run a query it must be compiled into SQL. You can use the CompiledQuery type to pre-compile Entity Framework queries in order to do this work ahead of time, before the end user has to wait for it. On … honeysweety

c# - Entity Framework async operation takes ten times as long to

EF6 SQLQuery very slow but database is very fast

WebFeb 25, 2024 · Entity Framework loads very slowly the first time because the first query EF compiles the model. If you are using EF 6.2, you can use a Model Cache which loads a prebuilt edmx when using code first; instead, EF generates it on startup. public class MyDbConfiguration : DbConfiguration { public MyDbConfiguration () : base () { var path = … honey sweetness compared to sugarWebSep 18, 2024 · 1. In the end, it's a SQL query. Run it in the debugger, with a breakpoint at the call to ToListAsync. Take a look at query and its generated SQL in the debugger. Do a sanity check on the SQL. Copy it over to SSMS and see if it takes a long time to run. Then do the normal thing you'd do to try to optimize a query (take a look at the query plan ... honey sweet racehorse

"WebSep 8, 2016 · Apparently connecting to the SQL server is taking the most of the time. 15 seconds for the first time is a lot of time to accept, I have never seen such a delay in any application. the object graph is small its only 12 tables with very few records, even no records for some tables, for example, workflow table contains only 2 records. the ... " - Entity framework first query takes long time

Entity framework first query takes long time

c# - EF LINQ ToList is very slow - Stack Overflow

WebMay 31, 2024 · Handling Entity Framework Core migrations: creating a migration – Part 1; ... Relational fixup, different from normal query. The first step will have filled in the primary keys and foreign keys, which define how the data is connected to each other. ... (Identity Resolution can take a long time). This is why you end up with four Authors ... WebOct 7, 2024 · 5) I am using migrations (code first) The first request will take about 20 second to execute and sometime will timeout. But all subsequent requests will take about 2-3 seconds to return results. I am doing a search with "contain" as part of the condition. So I realize that will add some inefficiency to the query.

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WebApr 29, 2015 · If I run the following query in SQL Server Management Studio, it takes about 1-2 seconds to complete... select * from GeographicalLocations where Active=1 If I do the equivalent in LinqPad, it takes about 2-3 seconds... GeographicalLocations.Where (gl => gl.Active) However, the same code in a repository that uses EF4 takes about 10-11 … WebFeb 7, 2024 · I would like to ask. We have a "problem" that causes that first query after project startup takes long to handle. First time query is handled takes several seconds let's say 2-8 seconds (depending on …

WebMar 9, 2024 · If a certain query is taking too much time (e.g. because an index is missing), this can be seen discovered by inspecting command execution logs and observing how long they actually take. EF makes it very easy to capture command execution times, via either simple logging or Microsoft.Extensions.Logging: WebCategory Query Learning for Human-Object Interaction Classification Chi Xie · Fangao Zeng · Yue Hu · Shuang Liang · Yichen Wei A Unified Pyramid Recurrent Network for Video Frame Interpolation Xin Jin · LONG WU · Jie Chen · Chen Youxin · Jay Koo · Cheul-hee Hahm SINE: Semantic-driven Image-based NeRF Editing with Prior-guided Editing Field

WebFeb 25, 2024 · Entity Framework loads very slowly the first time because the first query EF compiles the model. If you are using EF 6.2, you can use a Model Cache which loads … WebJan 11, 2016 · To counter this Cartesian explosion, Entity Framework core 5 introduced the concept of split queries that enables loading related data in multiple queries. It prevents building one massive, multiplied SQL result set. Also, because of lower query complexity, it may reduce the time it takes to fetch data even with multiple roundtrips.

WebAug 7, 2015 · Second step: Exclude as much as possible. Indexes (No, the query is fast) Returning too much data (No, according to the info you have) Slow query compilation (No, raw sql query is used) Slow data transfer (No, the other queries works well) Slow DbContext initialization (No, you said it's not the first query)

WebMar 19, 2015 · The first page is rows 1 to 10, second page is 11 to 20 and so on. Let's see how this query works when we try to get the fourth page, i.e. rows 31 to 40. PageSize=10, PageNumber=3. In the inner query we select first 40 rows. Note, that we don't scan the whole table here, we scan only first 40 rows. We don't even need explicit … honeys west loopWebNov 22, 2015 · 6. Your filtered variable contains a query which is a question, and it doesn't contain the answer. If you request the answer by calling .ToList (), that is when the query is executed. And that is the reason why it is slow, because only when you call .ToList () is the query executed by your database. It is called Deferred execution. honey swimwearWebJan 22, 2016 · Test results are as follows: EF6 result：. User table, the time required for the first query: 1453 millisecond. User table, the time required for the second query: 16 millisecond. Role table, the time required for the first query: 832 millisecond. User table, the time required for the third query: 26 millisecond. honey sweet tea time pianoWebFeb 15, 2015 · Entity Framework async operation takes ten times as long to complete. I’ve got an MVC site that’s using Entity Framework 6 to handle the database, and I’ve been … honey sweets recipeWebOct 14, 2024 · Sorted by: 1. First start is slow because EF configuring table mappings. Most important thing that you can do is to redesign you dbcontext. You must split configurations into different contexts. One context must contains few entities, associated in meaning (as is done in DDD). E.g. honey sweet potatoe rollsWebMay 8, 2024 · 2. Serialization is not the big deal, it's easy to notice now that you have added the LINQ query that the issue is the poor SQL Entity Framework will generate from it. First of all, you should be using eager loading to join your products table with the parts table. You can do that simply by adding an Include method call. honey sweet potato pieWebDec 16, 2015 · Because there’s a long-running query, we’ll want to take a look at the execution plan to understand why that query ran slowly. We can see that the most expensive operation is the Table Scan. This means that SQL Server is having to look at every row in the table, and it’s typical to see that take a long time. honey sweet tea time