parallelize bases to affine

Co-authored-by: Han <[email protected]>

src/msm.rs

@@ -365,7 +365,7 @@ pub fn best_multiexp<C: CurveAffine>(coeffs: &[C::Scalar], bases: &[C]) -> C::Cu
     // coeffs to byte representation
     let coeffs: Vec<_> = coeffs.par_iter().map(|a| a.to_repr()).collect();
     // copy bases into `Affine` to skip in on curve check for every access
-    let bases_local: Vec<_> = bases.iter().map(Affine::from).collect();
+    let bases_local: Vec<_> = bases.par_iter().map(Affine::from).collect();
 
     // number of windows
     let number_of_windows = C::Scalar::NUM_BITS as usize / c + 1;