Detox: `viewElement.scroll` slows down on repeated calls when reusing the Detox element

Description

viewElement.scroll slows down on repeated calls when reusing the Detox element.

• I have tested this issue on the latest Detox release and it still reproduces

Reproduction

Code with a slow down:

  const scrollView = element(by.id('scrollViewId'));
  while (true) {
    await scrollView.scroll(400, 'down');
    console.log('scrolled');
  }
  // it slow downs for me after 10 or so scrolls

It slows down by introducing a noticeable (more than a few seconds) lag before doing the scroll.

This will work well:

  while (true) {
    await element(by.id('scrollViewId')).scroll(400, 'down');
    console.log('scrolled');
  }
  // no slow downs

The first snippet works well on Android. Please, either fix that or document.

Expected behavior

No scroll slowdowns.

Screenshots

If applicable, add screenshots to help explain your problem.

Environment (please complete the following information):

• Detox: 16.4.0
• React Native: 0.61.5
• Node: 14.1.0
• Device: MacBook with Catalina 10.15.4
• Xcode: 11.4.1
• iOS: 13.4 (emulator)
• macOS: 10.15.4

Logs

If you are experiencing a timeout in your test

• I have followed the instructions under Lower-level Idling Resources Debug and am providing the log below: ios.log

If you are seeing a build problem (e.g. during npm install)

• I am providing the npm install log below:

Device and verbose Detox logs

• I have run my tests using the --loglevel trace argument and am providing the verbose log below: ios-trace.log