JSON Parsing using multiple cores

Question

iOS devices are getting better, have more cores but how can we get benefit out of it while we are parsing JSON?

Currently, I am using JSONDecoder() for JSON Parsing. Is there way we can do it faster? Maybe using multiple threads parsing in parts etc.

Any hints/pointers will be appreciated.

    import Foundation
    
    let filePath = Bundle.main.path(forResource: "json", ofType: "json")
    
    struct Vehicle: Codable {
        private let color: String
        private let tires: [Tire]
        private let number: String
    }
    
    struct Tire: Codable {
        private let company: String
        private let isNew: Bool
    }
    
    func parseData(_ data: Data) {
        let decoder = JSONDecoder()
        try? decoder.decode([Vehicle].self, from: data)
    }
    
    func modifiedParsing(_ data: Data) {
        
    }
    
    let data = try String(contentsOfFile: filePath!).data(using: .utf8)
    
    let date = Date()
    let start = date.timeIntervalSince1970
    
    //parseData(data!)
    
    let end = Date().timeIntervalSince1970
    
    print("Time Taken \(end-start)")
    
    /*
     Initial Times: [3.728722095489502, 3.5913820266723633, 3.5568389892578125, 3.534559965133667, 3.506725311279297]
     After Changes
     */

Answer 1

I wanted to make JSON Parsing faster. For anyone who is looking for a good solution please refer: https://github.com/bwhiteley/JSONShootout

Marshal is faster than codable.