Function batch_add 

pub fn batch_add(
    lhs: &[f64],
    rhs: &[f64],
    result: &mut [f64],
) -> Result<(), BatchError>

Batch element-wise addition: result[i] = lhs[i] + rhs[i].

Errors

Returns BatchError::LengthMismatch when any of the three slices has a different length.