Its pretty clear that the newer GCC correctly vectorizes ATLAS for the CPU 
whereas the old one did not.

On Monday, January 7, 2013 8:50:14 PM UTC, Snark wrote:
>
> >> 
> ModularFormsRing(Gamma0(3)).modular_forms_of_weight(80).cuspidal_submodule().q_expansion_basis(prec=30)
>  
>
> I'm still impressed a change of compiler version gives such wildly 
> varying results ; what causes this phenomenon? 
>

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