Performance of layer 3 switches when they are acting like a router

Hi everybody
I want to know what are the performance differences of layer 3 switches when they are acting just like a router with lots of route entries in their routing table in compare to when they are acting in layer 2?
The layer 3 switch in our case is “WS-C3750X-24T-S”
I guess there is a difference between these two situations:
when the switch is acting in layer 3 and just routes packet between different VLAN (in routing table we just have entries for connected interfaces and nothing else)
when the switch is acting in layer 3 and also has to do routing based on static routes or routes learned via a routing table
I think in situation 1 the switch performance is just like when it is acting in layer 2 but I don’t know about situation 2. Does anyone know about this?
Thanks a lot

Hello.
Actually there is no difference unless you reach a capacity limit of routing table and other TCAM entries.
Also you need to note that some IOSs do not support full (but stub only) EIGRP functionality.
PS: see details regarding routing capacity.

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