StringConversionTest.swift

func testStringToByteArray1(){

    let value : StaticString = "maxim"
    let data  = UnsafeMutablePointer<UInt8>.alloc(500_000)
    var cursor = 0
    let time1 = NSDate()
    
    for _ in 0...100_000 {
        let buf = value.utf8Start
        let length = value.byteSize
        
        data.advancedBy(cursor).initializeFrom(UnsafeMutablePointer<UInt8>(buf), count: length)
        cursor += length
    }
    let after1 = NSDate()
    print("\((after1.timeIntervalSince1970 - time1.timeIntervalSince1970) * 1000.0) mseconds for StaticString to binary")
}

testStringToByteArray1()

func testStringToByteArray2(){
    
    let value = "maxim"
    let data  = UnsafeMutablePointer<UInt8>.alloc(500_000)
    var cursor = 0
    let time1 = NSDate()
    for _ in 0...100_000 {
        let buf = [UInt8](value.utf8)
        let length = buf.count
        
        data.advancedBy(cursor).initializeFrom(UnsafeMutablePointer<UInt8>(buf), count: length)
        cursor += length
    }
    let after1 = NSDate()
    print("\((after1.timeIntervalSince1970 - time1.timeIntervalSince1970) * 1000.0) mseconds for String through utf8 to binary")
}

testStringToByteArray2()


func testStringToByteArray3(){
    
    let value = "maxim"
    let data  = UnsafeMutablePointer<UInt8>.alloc(500_000)
    var cursor = 0
    let time1 = NSDate()
    for _ in 0...100_000 {
        let buf = value.cStringUsingEncoding(NSUTF8StringEncoding)!
        let length = buf.count - 1
        
        data.advancedBy(cursor).initializeFrom(UnsafeMutablePointer<UInt8>(buf), count: length)
        cursor += length
    }
    let after1 = NSDate()
    print("\((after1.timeIntervalSince1970 - time1.timeIntervalSince1970) * 1000.0) mseconds for String through c-String to binary")
}

testStringToByteArray3()


0.271081924438477 mseconds for StaticString to binary
17.2080993652344 mseconds for String through utf8 to binary
60.7211589813232 mseconds for String through c-String to binary