anchor.diff:      if (printMode == 1) {
         _printErrorsAndPerf();
       } else if (printMode == 2) {
  -      _printColdPerf();
  +      //_printColdPerf();
       }
   
       // compute max severity and set exitCode
  
positive.code: 
    static int _currentTimeInMillis() =>
        new DateTime.now().millisecondsSinceEpoch;
  
    static JavaFile _getPackageDirectoryFor(JavaFile sourceFile) {
      // we are going to ask parent file, so get absolute path
      sourceFile = sourceFile.getAbsoluteFile();
      // look in the containing directories
      JavaFile dir = sourceFile.getParentFile();
      while (dir != null) {
        JavaFile packagesDir = new JavaFile.relative(dir, "packages");
        if (packagesDir.exists()) {
          return packagesDir;
        }
        dir = dir.getParentFile();
      }
      // not found
      return null;
    }
  
    /// Returns the [Uri] for the given input file.
    /// Usually it is a `file:` [Uri], but if [file] is located in the `lib`
  
negative.code: import 'package:analyzer/src/generated/constant.dart';
  import 'package:analyzer/src/generated/element.dart';
  import 'package:analyzer/src/generated/engine.dart';
  import 'package:analyzer/src/generated/java_io.dart';
  import 'package:analyzer/src/generated/sdk.dart';
  import 'package:analyzer/src/generated/sdk_io.dart';
  