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Tips to improve site speed?

I almost finished working with this online library: http://gramma.ro

I have class C in YSlow, but I'm still not happy with the average time it took for this website to load (~ 7 seconds on my internet connection).

Some of you may say that it works well, but please compare it with the speed of this: http://www.libris.ro/ , which is absolutely fast.

Do you have any recommendations for my application? Do you see critical places where I can improve, which can seriously reduce the load time of my site?

Database : sql server 2008.

Language : C # + asp.net

Hardware : dedicated server, AMD 64 2.2 GHz, 2 GB RAM

Thanks in advance...

The UPDATE . I used the OutputCache parameter (1 hour or 1 day) for 4 user controls on my page that improved website loading from 3 seconds.

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8 answers

The simple answer is to upgrade your hardware. However, I think there may be a few simple points for improvement.

How is memory used? You are caching the right things (something like NHibernate SessionFactory should not be updated with every request).

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