绩效实体框架代码优先

Question

我首先使用代码和实体框架存在性能问题。我只想阅读最多3秒的简单映射信息。

// The enity
[Table("ResourceMappingEntity")]
    public class ResourceMappingEntity
    {

        /// <summary>
        /// Gets or sets the testing number.
        /// </summary>
        /// <value>
        /// The testing number.
        /// </value>
        [Key]
        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
        public long Id { get; set; }


        [Required]
        [Column(TypeName = "varchar")]
        [StringLength(80)]
        public string LocationNameOrIp { get; set; }


        [Required]
        [Column(TypeName = "varchar")]
        [StringLength(80)]
        public string Resource { get; set; } //todo mb: noch nicht drin

        [Column(TypeName = "varchar")]
        [StringLength(80)]
        public string App { get; set; } //todo mb: noch nicht drin

        /// <summary>
        /// Gets or sets the created at.
        /// </summary>
        /// <value>
        /// The created at.
        /// </value>
        [Column(TypeName = "datetime2")]
        public DateTime CreatedAt { get; set; }

    }

//the query
  using (var ctx = new OsmaTestingContextFactory().Create())
                {
                    ctx.Configuration.ProxyCreationEnabled = false;


                    var two = DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond;

                    var dif = two - one;

                    IEnumerable<string> res = await ctx.ResourceMappingEntityStorage.AsNoTracking()
                                                .Where(
                                                    x => x.LocationNameOrIp == IPOrName)
                                                .Select(y => y.Resource)
                                                .ToListAsync();

                    var three = DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond;

                    var dif2 = three - two;

                    if (res.Count() != 1)
                    {
                        throw new Exception("Can not find a specific resouce");
                    }

                    return res.First();
                }


// I also set IsUnicode to false....

有什么想法吗？

希望得到帮助或替代解决方案？！应该在几分钟内就像SQL管理工作室一样好了

有没有一种好的或标准的方法来测试ef的性能？

THX

马库斯