问为什么AES在Android 24+上的加密/解密速度比3倍慢？

EN

Android 23: 136959 B/s
Android 26: 34419 B/s

/**
 * Decrypt the given data with the given key
 *
 * @param data The data to decrypt
 * @return The decrypted bytes
 */
public static byte[] decrypt(byte[] data, byte[] key, byte[] iv) {
    if (key == null || iv == null) {
        throw new AssertionError("DECRYPT: Key or iv were not specified.");
    }

    // make sure key is AES256
    byte[] bookKeyData = new byte[32];
    byte[] outBuf;
    System.arraycopy(key, 0, bookKeyData, 0, key.length);

    try {
        PaddedBufferedBlockCipher cipher = new PaddedBufferedBlockCipher(new CBCBlockCipher(new AESFastEngine()));
        cipher.init(false, new ParametersWithIV(new KeyParameter(bookKeyData), iv));
        int outputSize = cipher.getOutputSize(data.length);
        outBuf = new byte[cipher.getOutputSize(outputSize)];
        int processed = cipher.processBytes(data, 0, data.length, outBuf, 0);
        if (processed < outputSize) {
            processed += cipher.doFinal(outBuf, processed);
        }
        return Arrays.copyOfRange(outBuf, 0, processed);

    } catch (Exception e) {
        e.printStackTrace();
    }

    return null;
}