Proper local complete intersection morphisms preserve perfect complexes

Let $f:X⟶Y$ be a proper and local complete intersection morphism of schemes. We prove that $\mathbb{R}{f}_{\ast }$ preserves perfect complexes, without any projectivity or noetherian assumptions. This provides a different proof of a theorem by Neeman and Lipman based on techniques from derived algebraic geometry to proceed a reduction to the noetherian case.