问题
I'm doing like this:
entities.AsParallel().ForAll(o => repository.Insert(o));
is this good, am I going to have more performance with this ?
回答1:
No.
This one can be faster, as it leverages the paralellism to the SQL, but in the end the SQL has to make a lock for the table (page), as it makes an insert. therefore each paralell request is executed after another again.
If you want to make a bulk insert, than make a SP accepting all entries (e.g. a table with SQL 2008.) or do it with Linq2SQL.
that would be the correct design solution.
回答2:
Probably not. Each insert would actually take place on a seperate thread, while bulk insert work well by transferring large amounts of data from a single thread, at a single time.
PS: SqlBulkCopy would work much, much better than a parallel insert. Use that if possible.
来源：https://stackoverflow.com/questions/3290353/is-it-ok-to-use-plinq-forall-for-a-bulk-insert-into-database