【发布时间】：2012-04-02 02:41:21
【问题描述】：
我试图确定实体框架比存储过程慢了多少。我希望说服我的老板让我们使用 Entity Framework 来简化开发。
问题是我进行了性能测试，看起来 EF 比 Stored Procs 慢了大约 7 倍。我觉得这非常难以置信，我想知道我是否遗漏了什么。这是一个决定性的测试吗？我可以做些什么来提高 EF 测试的性能？
var queries = 10000;
// Stored Proc Test
Stopwatch spStopwatch = new Stopwatch();
spStopwatch.Start();
for (int i = 0; i < queries; i++ )
{
using (var sqlConn = new SlxDbConnection().Connection)
{
var cmd = new SqlCommand("uspSearchPerformanceTest", sqlConn) { CommandType = CommandType.StoredProcedure };
cmd.Parameters.AddWithValue("@searchText", "gstrader");
sqlConn.Open();
SqlDataReader dr = cmd.ExecuteReader();
List<User> users = new List<User>();
while (dr.Read())
{
users.Add(new User
{
IsAnonymous = Convert.ToBoolean(dr["IsAnonymous"]),
LastActivityDate = Convert.ToDateTime(dr["LastActivityDate"]),
LoweredUserName = dr["LoweredUserName"].ToString(),
MobileAlias = dr["MobileAlias"].ToString(),
UserId = new Guid(dr["UserId"].ToString()),
UserName = (dr["UserName"]).ToString()
});
}
var username = users.First().UserName;
sqlConn.Close();
}
}
spStopwatch.Stop();
Console.WriteLine("SP - {0} Queries took {1}", queries, spStopwatch.ElapsedMilliseconds );
// EF Test
Stopwatch entityStopWatch = new Stopwatch();
var context = new SlxDbContext();
var userSet = context.Set<User>();
entityStopWatch.Start();
for (int i = 0; i < queries; i++)
{
User user = userSet.Where(x => x.UserName == "gstrader").First();
}
entityStopWatch.Stop();
Console.WriteLine("Entity - {0} Queries took {1}", queries, entityStopWatch.ElapsedMilliseconds);
结果：
SP - 10000 次查询耗时 2278
实体 - 10000 次查询耗时 16277
【问题讨论】：
-
我想补充一点，拆箱应该足够了，而不是明确地进行转换。这样做： (string)dr["MobileAlias"] 而不是 .ToString()
标签： entity-framework stored-procedures performance-testing database-performance