Ling to SQL and Entity Framework performance analysis

Linq to SQL and Entity Framework performance comparison and optimization Alexander Konduforov Email: alexander.konduforov@gmail.com Weblog: www.merle-amber.blogspot.com

Goals ,[object Object],[object Object],[object Object],[object Object],[object Object]

General ORM architecture Objects provider Query Records Data Objects SQL Database provider Databases Databases Databases Query Mapping

Linq to SQL architecture Linq to SQL Data Context LINQ Records Data IEnumerable<T> SQL SQL LINQ Linq to SQL Data Provider MS SQL Server SQL

Entity Framework architecture ADO.NET Data Providert ADO.NET Data Provider ADO.NET Data Provider Object Services LINQ to Entities CCT xDataReader DBDataReader IEnumerable<T> ESQL CCT ESQL LINQ EntityClient Data Provider

Internal caching mechanisms ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Main performance losses ,[object Object],[object Object],[object Object],[object Object],[object Object]

Performance considerations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Tests suite and tools ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Initialization and views pre-generation ,[object Object],[object Object],[object Object],[object Object],207 38 12 Time, ms. EF L2S Readers Data Access

Tracking vs. no tracking ,[object Object],[object Object],[object Object],[object Object],[object Object],61 138 25 EF (no tracking) 79 30 20 L2S (no tracking) 140 98 33 Advanced (lazy) 88 50 EF 83 23 Advanced (optimal) 23 20 Simple L2S Readers Data Access

Objects materialization and context-level caching ,[object Object],[object Object],[object Object],[object Object],[object Object],76.9 54.5 36.1 EF (one) 77.9 36.6 13.8 L2S (one) 148 107.4 35.2 Advanced (lazy) 79.8 54.1 EF (many) 79.2 24.2 Advanced (optimal) 23.8 23.3 Simple L2S (many) Readers Data Access

Linq queries compilation ,[object Object],[object Object],[object Object],42 109 4 2 EF (compiled) 63 97 21 L2S (compiled) 137 102 Advanced (lazy) 82 48 EF 85 Advanced (optimal) 23 Simple L2S Data Access

Linq to Entities vs. EntitySQL ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],32 98 44 EntitySQL 42 109 4 2 Linq to Entities (compiled ) 137 Advanced (lazy) 82 48 Linq to Entities Advanced (optimal) Simple Data Access

Lazy vs. eager loading ,[object Object],[object Object],[object Object],[object Object],[object Object],85 102 L2S 63 97 L2S (compiled) 32 98 EntitySQL 42 109 Linq to Entities (compiled ) 137 Advanced (lazy) 82 Linq to Entities Advanced (eager) Data Access

Data modification ,[object Object],[object Object],[object Object],2,952 156 52 EF 12,075 268 153 L2S 75 Advanced 2,285 42 Commands Heavy Simple Data Modification

SQL generation ,[object Object],33% 33% 33% Simple retrieval N/A N/A N/A Advanced retrieval (lazy) 24% 55% 21% Advanced retrieval (optimal) N/A N/A 33% EF N/A N/A 33% L2S N/A Advanced modification N/A 33% Readers/ Commands Heavy modification Simple modification Queries

Performance advices ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Useful links ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Ling to SQL and Entity Framework performance analysis

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