Restore partial analysis of analysis options files

pkg/analyzer_cli/tool/perf.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 /// An entrypoint used to run portions of analyzer and measure its performance.
 library analyzer_cli.tool.perf;
 
 import 'dart:async';
 import 'dart:io' show exit;
 
@@ skipping 81 matching lines @@
   scanTimer = new Stopwatch();
   var old = scanTotalChars;
   scanTotalChars = 0;
   var parseTimer = new Stopwatch()..start();
   for (var source in files) {
     parseFull(source);
   }
   parseTimer.stop();
 
   // Report size and scanning time again. See discussion above.
-  if (old != scanTotalChars) print('input size changed? ${old} chars');
+  if (old != scanTotalChars) print('input size changed? $old chars');
   report("scan", scanTimer.elapsedMicroseconds);
 
   var pTime = parseTimer.elapsedMicroseconds - scanTimer.elapsedMicroseconds;
   report("parse", pTime);
 }
 
 /// Parse the full body of [source] and return it's compilation unit.
 CompilationUnit parseFull(Source source) {
   var token = tokenize(source);
   var parser = new Parser(source, AnalysisErrorListener.NULL_LISTENER);
@@ skipping 16 matching lines @@
   // Recording and reporting this twice is unnecessary, but we do so for now to
   // validate that the results are consistent.
   scanTimer = new Stopwatch();
   var old = scanTotalChars;
   scanTotalChars = 0;
   for (var source in files) {
     tokenize(source);
   }
 
   // Report size and scanning time again. See discussion above.
-  if (old != scanTotalChars) print('input size changed? ${old} chars');
+  if (old != scanTotalChars) print('input size changed? $old chars');
   report("scan", scanTimer.elapsedMicroseconds);
 }
 
 /// Load and scans all files we need to process: files reachable from the
 /// entrypoint and all core libraries automatically included by the VM.
 Set<Source> scanReachableFiles(Uri entryUri) {
   var files = new Set<Source>();
   var loadTimer = new Stopwatch()..start();
   collectSources(sources.forUri2(entryUri), files);
 
@@ skipping 10 matching lines @@
     "dart:typed_data",
     "dart:io"
   ];
 
   for (var lib in libs) {
     collectSources(sources.forUri(lib), files);
   }
 
   loadTimer.stop();
 
-  print('input size: ${scanTotalChars} chars');
+  print('input size: $scanTotalChars chars');
   var loadTime = loadTimer.elapsedMicroseconds - scanTimer.elapsedMicroseconds;
   report("load", loadTime);
   report("scan", scanTimer.elapsedMicroseconds);
   return files;
 }
 
 /// Sets up analyzer to be able to load and resolve app, packages, and sdk
 /// sources.
 Future setup(Uri entryUri) async {
   var provider = PhysicalResourceProvider.INSTANCE;
@@ skipping 14 matching lines @@
   scanTotalChars += contents.length;
   // TODO(sigmund): is there a way to scan from a random-access-file without
   // first converting to String?
   var scanner = new Scanner(source, new CharSequenceReader(contents),
       AnalysisErrorListener.NULL_LISTENER)
     ..preserveComments = false;
   var token = scanner.tokenize();
   scanTimer.stop();
   return token;
 }