  /// @notice Computes the current auction period
  /// @return the current period
  function _computePeriod() internal view returns (uint256) {
-    uint256 _timestamp = block.timestamp;
-    if (_timestamp < periodOffset) {
+    if (block.timestamp < periodOffset) {
      return 0;
    }
-    return (_timestamp - periodOffset) / periodLength;
+    return (block.timestamp - periodOffset) / periodLength;
  }
