How to improve this CDS view performance

Hi Experts,

I am using a CDS view with following join conditions.

And the where condition is " where  a.kdauf = :p_vbeln  or ( b.kdauf = :p_vbeln and b.werks = :p_werks ) or c.vbeln = :p_vbeln ".

Its taking at around 30 secs to execute. Is there any other way to make the cds view to work fast without hampering the functional requirement.

Thanks and regards

- Sabarna.