在不同平台上的Performance.now（）执行时间

Question

我正在测试使用webcryptoapi在Typescript中编写的基于位置的加密库的时间性能。我想了解MacOs和android等不同平台的时差。为此，我使用了Macbook pro（2017）和Samsung galaxy s2 android平板电脑。

为了测试该库，我创建了一个简单的HTML页面，其中包含一些文本框区域，加密按钮和解密按钮。单击按钮时，将进行加密。现在从 performance.now（）函数可以看到下面的内容，我计算时差并将其记录到控制台上。但是，我意识到与Macbook Pro计算机相比，平板电脑上的加密时间总是更短。从逻辑上讲，笔记本电脑不是比平板电脑更坚固吗？还是与API调用速度有关？尽管平板电脑功能较弱，但我始终不知道平板为何总是更快。预先感谢。

public async encrypt(transformedLocation: Int32Array, message: String, toleranceDistance: number) {
    let context = this
    try {
        let keyDerivationStartTime = performance.now();
        let key = await this.deriveKey(transformedLocation)
        let keyDerivationFinishTime = performance.now();
        let keyhash = await this.calculateKeyHash(key)
        let plaintTextBytes = DataConvertionCalculations.stringToByteArray(message)
        let encryptionStartTime = performance.now();
        let encryptedMessage = await this.encryptMessage(key, plaintTextBytes)
        let encryptionFinishTime = performance.now();
        let result = new ResultHolder(encryptedMessage, keyhash, toleranceDistance, context.salt, context.ivBytes)
        let wholeTime= performance.now();
        console.log("Key derivation time:" + (keyDerivationFinishTime-keyDerivationStartTime))
        console.log("Encryption operation time:" + (encryptionFinishTime-encryptionStartTime))
        console.log("Whole encryption operation took:" + (wholeTime-keyDerivationStartTime))
        return result
    } catch (err) {
        return err
    }
}