Snort performance: can a single snort instance with nearly 3000 rules handle 1G traffic per second?

[Maxim <hittlle () 163 com>]

Hi all,
       Have you tested the snort performance? If I feed snort with 3,000 rules, how can I optimize its configuration to 
handle 1 gigabits of traffic per second?Does any one have experience on this?
My hardware would be
                          Memory: 4G for snort
                          CPU: Intel I5
Many thanks.

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