Performance problem between Oracle.DataAccess v1 and v2

Question

Hi, I have serious performance problem with OracleDataReader when I use the GetValues method.
My server is Oracle 9.2.0.7, and i use ODAC v10.2.0.221
I create a dummy table for benchmark :
create table test (a varchar2(50), b number)
begin
for i in 1..62359 loop
insert into test values ('Values ' || i, i);
end loop;
commit;
end;
I use the same code for benchmark Framework v1 and Framework v2.
Code :
try {
OracleConnection c = new OracleConnection("user id=saturne_dbo;password=***;data source=satedfx;");
c.Open();
go(c);
c.Close();
catch (Exception ex) {
MessageBox.Show(ex.Message);
private void go(IDbConnection c) {
IDbCommand cmd = c.CreateCommand();
cmd.CommandText = "select * from test";
cmd.CommandType = CommandType.Text;
DateTime dt = DateTime.Now;
IDataReader reader = cmd.ExecuteReader();
int count = 0;
while (reader.Read()) {
object[] fields = new object[reader.FieldCount];
reader.GetValues(fields);
count++;
reader.Close();
TimeSpan eps = DateTime.Now - dt;
MessageBox.Show("Time " + count + " : " + eps.TotalSeconds);
Result are :
Framework v1 with OracleDataAccess 1.10.2.2.20 "Time 62359 : 0.5"
Framework v2 with OracleDataAccess 2.10.2.2.20 "Time 62359 : 3.57" FACTOR 6 !!!!!
I notice same problem with oleDb provider and Microsoft Oracle Client provider..
It's a serious problem for my production server, the time calculation explode...
Where is the explication ?
Do u know solution ?

Answer 1

Can you please try out following -
1. Create a .NET 1.x DLL with your benchmark code. This will obviously use ODP.NET for .NET 1.x.
2. Call this assembly routine from a .NET 1.x executable and note the results.
3. Now call this assembly routine from a .NET 2.0 executable and note the results.
The idea is to always use "ODP.NET for .NET 1.x" even in .NET 2.0 runtime. This will tell us whether the performance degradation is a runtime issue.