pfandrade / CodableBenchmarks

Performance benchmarks for Codable and JSONSerialization

Codable Benchmarks

There are a few alternative Codable encoder/decoders out there but suprisingly very little about their performance*.

This repo use a simple test to benchmark encoding, decoding and file size.

Benchmarked libraries:

• Swift's own JSON Codable implementation
• CBORCoding
• BinaryCodable
• PotentCodables
• MessagePacker
• Cod

Foundation's JSONSerialization is also included for comparison.

Test method

All test encode and decode a list of 100, 1000 and 10000 Airport structs.

public struct Airport: Codable {
    let name: String
    let iata: String
    let icao: String
    let coordinates: [Double]
    
    public struct Runway: Codable {
        enum Surface: String, Codable {
            case rigid, flexible, gravel, sealed, unpaved, other
        }
        
        let direction: String
        let distance: Int
        let surface: Surface
    }
    
    let runways: [Runway]
}

Results

Test were ran on a 14'inch M1 MacBook Pro.

100 Airports	Encoding	Decoding	Size
JSONCodable	0.0018	0.0022	20492 (20 KB)
CBORCoding	0.0033	0.0035	14773 (15 KB)
BinaryCodable	0.0034	crashes	15039 (15 KB)
PotentCBOR	0.0024	0.0027	14773 (15 KB)
MessagePacker	0.0014	0.0020	14751 (15 KB)
Cod	0.0014	0.0012	9857 (10 KB)
JSONSerialization	0.0009	0.0010	20492 (20 KB)

1000 Airports	Encoding	Decoding	Size
JSONCodable	0.011	0.017	209877 (210 KB)
CBORCoding	0.020	0.025	152655 (153 KB)
BinaryCodable	0.026	crashes	155401 (155 KB)
PotentCBOR	0.019	0.022	152655 (152 KB)
MessagePacker	0.009	0.013	152422 (152 KB)
Cod	0.013	0.008	102395 (102 KB)
JSONSerialization	0.006	0.008	209877 (210 KB)

10000 Airports	Encoding	Decoding	Size
JSONCodable	0.088	0.148	2084963 (2.1 MB)
CBORCoding	0.180	0.233	1522226 (1.5 MB)
BinaryCodable	0.246	crashes	1549741 (1.5 MB)
PotentCBOR	0.169	0.192	1522226 (1.5 MB)
MessagePacker	0.069	0.113	1519881 (1.5 MB)
Cod	0.124	0.063	1021610 (1.0 MB)
JSONSerialization	0.041	0.063	2084963 (2.1 MB)

License

MIT

Contact

Paulo @pfandrade_