[Ipopt] Ipopt - WarmStart

Fri Jul 1 11:04:10 EDT 2011

Dear All

I am running IPOPT with this warmstart options:

warm_start_init_point yes
warm_start_bound_push 1e-6 
warm_start_mult_bound_push 1e-6

I am trying to figure out why I cannot obtain better computational times after a third run.
For example, a problem of 42915 variables and 42615 constraints takes for:

1st run -> time = 23.7 min
2nd run -> time= 4.61 min
3rd run -> time= 4.6 min

If I am giving to IPOPT the optimal solution, why the following run takes the same time as the second?
Thanks
Juan

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