Comparing 2 linq applications: Unexpected result

Posted by lukesky on Stack Overflow See other posts from Stack Overflow or by lukesky
Published on 2010-05-16T11:21:19Z Indexed on 2010/05/16 11:30 UTC
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Filed under:

ASP.NET

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LINQ

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sql-server

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objectdatasource

I drafted 2 ASP.NET applications using LINQ. One connects to MS SQL Server, another to some proprietary memory structure. Both applications work with tables of 3 int fields, having 500 000 records (the memory structure is identical to SQL Server table). The controls used are regular: GridView and ObjectDataSource. In the applications I calculate the average time needed for each paging click processing.

LINQ + MS SQL application demands 0.1 sec per page change.
LINQ + Memory Structure demands 0.8 sec per page change.

This Is shocking result. Why the application handling data in memory works 8 times slower than the application using hard drive? Can anybody tell me why that happens?

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