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// Flags: --allow-natives-syntax

// Tests timer milliseconds granularity.

// Don't run this test in gc stress mode. Time differences may be long
// due to garbage collections.
%SetFlags("--gc-interval=-1");
%SetFlags("--nostress-compaction");

(function run() {
  var start_test = Date.now();
  // Let the retry run for maximum 100ms to reduce flakiness.
  for (var start = Date.now(); start - start_test < 100; start = Date.now()) {
    var end = Date.now();
    while (end - start == 0) {
      end = Date.now();
    }
    if (end - start == 1) {
      // Found milliseconds granularity.
      return;
    } else {
      print("Timer difference too big: " + (end - start) + "ms");
    }
  }
  assertTrue(false);
})()