About the CryptoSwift performance result you compare. The value It's not right. about webcrypto.swift

[etienne-martin]

Hi Marcin,

I just updated my test with the latest version of CryptoSwift and I'm now getting 5255ms on my machine. Far better than the 24366ms from the Swift 3 version.

Here's the code I use for the benchmark:

import Foundation 
import CryptoSwift 

extension Date {
    func timestamp() -> Int64 {
        return Int64(self.timeIntervalSince1970 * 1000)
    }
}

let length = 10000000 // 10MB
let bytes = [UInt32](repeating: 0, count: length).map { _ in random() }
let data = Array(Data(bytes: bytes, count: length))

let start = Date().timestamp()

do {
    let aes = try AES(key: "passwordpasswordpasswordpassword", iv: "drowssapdrowssap") // aes256
    _ = try aes.encrypt(data)
    
    print(Date().timestamp()-start)
    
} catch { }

You can try the snippet above on swiftplayground.run, it takes around 1600ms to complete.

I must be doing something wrong because it's still far from 753ms.

I updated the doc to reflect the new number but I'm still curious about why I'm getting such a big difference in speed.

You say that maybe I'm testing with the debug build. Can you show me a way to check which build of CryptoSwift I use in my Xcode project?

Thanks for letting me know.

[krzyzanowskim]

The values don't look right for me. The online playground runs on the slowest possible Linux virtual machine (currently) that definitely shouldn't be 4 times faster than i7 MacBook. The playground isn't also set up for the performance.

Let's use the same setup:

$ git clone https://github.com/krzyzanowskim/CryptoSwift.git
$ git checkout tests/performance

Open the CryptoSwift.xcodeproj with Xcode 9.2, and run the testAESEncryptPerformance test on the mac:

Unfortunately, the SPM doesn't allow to adjust all the settings, but it can be run like this:

$ swift test -c release --filter "CryptoSwiftTests.AESTests/testAESEncryptPerformance" -Xswiftc -enable-testing -Xswiftc -Ounchecked -Xswiftc -whole-module-optimization -Xswiftc -no-link-objc-runtime -Xswiftc -enforce-exclusivity=none -Xswiftc -gnone