swift – What are my choices to transform OpenCV scale back to a local iOS code

Which native iOS framework is greatest used to eradicate this cpu hog written in OpenCV?

/// Cut back the channel components of given Mat to a single channel
static func scale back(enter: Mat) throws -> Mat {
    
    let output = Mat(rows: enter.rows(), cols: enter.cols(), sort: CvType.CV_8UC1)
    
    for x in 0 ..< enter.rows() {
        for y in 0 ..< enter.cols() {
            let worth = enter.get(row: x, col: y)
            let dataValue = worth.scale back(0, +)
            strive output.put(row: x, col: y, information: [dataValue])
        }
    }
    
    return output
}

takes about 20+ seconds to do these will get and places on actual world information I put this code by.