Ling to SQL and Entity Framework performance analysis
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The document compares the performance of Linq to SQL and Entity Framework, discussing their architectures and identifying potential performance bottlenecks like infrastructure initialization, mapping overhead, and materialization. It outlines various performance optimization techniques for each like using views pre-generation in EF, turning off tracking, compiling Linq queries, and adjusting lazy vs eager loading. A series of tests are described that analyze the performance impacts of these different strategies using simple and advanced data retrieval and modification scenarios on a sample Northwind database.
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Hin síðari ári hafa komið fram lausnir sem varpa gögnum sjálfkrafa í töflugagnagrunna. Þetta er svoköllum Object-Relational Mapping tól. Þar sem slík vörpun er svo algeng þá má nota svo tól til að framkvæma vörpunina sjálfkrafa. Tilvik af klasa í minni er sjálfkrafa varpað á töflu í gunninum. Eitt tól sem gerir þetta er Hibernate og munum við skoða það nánar.
Við skoðum einnig NoSQL grunna en þessir grunnar hafa komið fram með 21. allar vefkerfum sem þurfa að skala yfir mjög margar nóður. Þar hentar Releational grunnurinn illa og önnur módel hafa verið reynd.
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