I don't have the trace here, but yes, I'm pretty sure. Actually, I was updating the byte[] from 3 bytes to 8MB, so the dirty check should be pretty fast because of the different lengths.
On Fri, Sep 24, 2010 at 6:45 PM, Fabio Maulo <[email protected]> wrote: > are you sure that the performance issue is at ExecuteNonQuery ? > I'm more inclined to think that it is somewhere else as, for example, in the > dirty-check because NH will compare byte-per-byte until a difference is > found. > > On Fri, Sep 24, 2010 at 9:12 AM, Juanma <[email protected]> wrote: >> >> Hi, >> >> I have a simple entity which contains a byte[] property. I need to map >> that property to a varbinary(max) column in SQL Server, but I'm >> getting very poor perfomance. >> >> For 8MB of data, NH is spending more than 30 seconds, while the same >> operation with raw ADO.NET takes less than 2 seconds. >> >> After profiling the NH app with dotTrace, I can see that the most >> expensive operation is SqlCommand.ExecuteNonQuery, but I don't >> understand why the same ExecuteNonQuery is taking above 30 seconds >> with NH and 2 seconds with ADONET. >> >> I've checked with the debugger and the SqlCommand executed by NH looks >> the same than the one I'm executing with raw ADO.NET (same >> CommandText, Parameters, Parameter Types, Parameter Values, etc.) >> >> Any idea? >> >> -- >> You received this message because you are subscribed to the Google Groups >> "nhusers" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/nhusers?hl=en. >> > > > > -- > Fabio Maulo > > -- > You received this message because you are subscribed to the Google Groups > "nhusers" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/nhusers?hl=en. > -- You received this message because you are subscribed to the Google Groups "nhusers" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/nhusers?hl=en.
