Entity Framework Core count does not have optimal performance

Question

I need to get the amount of records with a certain filter.

Theoretically this instruction:

_dbContext.People.Count (w => w.Type == 1);
         


        

Answer 1

Try this

(from x in _dbContext.People where x.Type == 1 select x).Count();

or you could do the async version of it like:

await (from x in _dbContext.People where x.Type == 1 select x).CountAsync();

and if those don't work out for you, then you could at least make the query more efficient by doing:

(from x in _dbContext.People where x.Type == 1 select x.Id).Count();

or

await (from x in _dbContext.People where x.Type == 1 select x.Id).CountAsync();