Optimize ApiSignature.addBytes()

pkg/analyzer/lib/src/summary/api_signature.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.
 
 library analyzer.src.summary.api_signature;
 
 import 'dart:convert';
 import 'dart:typed_data';
 
 import 'package:convert/convert.dart';
@@ skipping 54 matching lines @@
     _data.setUint8(_offset, b ? 1 : 0);
     _offset++;
   }
 
   /**
    * Collect a sequence of arbitrary bytes.  Note that the length is not
    * collected, so for example `addBytes([1, 2]);` will have the same effect as
    * `addBytes([1]); addBytes([2]);`.
    */
   void addBytes(List<int> bytes) {
-    _makeRoom(bytes.length);
-    new Uint8List.view(_data.buffer)
-        .setRange(_offset, _offset + bytes.length, bytes);
-    _offset += bytes.length;
+    int length = bytes.length;
+    _makeRoom(length);
+    for (int i = 0; i < length; i++) {
+      _data.setUint8(_offset + i, bytes[i]);
+    }
+    _offset += length;
   }
 
   /**
    * Collect a double-precision floating point value.
    */
   void addDouble(double d) {
     _makeRoom(8);
     _data.setFloat64(_offset, d, Endianness.LITTLE_ENDIAN);
     _offset += 8;
   }
@@ skipping 53 matching lines @@
     int oldLength = _data.lengthInBytes;
     if (_offset + spaceNeeded > oldLength) {
       int newLength = 2 * (_offset + spaceNeeded);
       ByteData newData = new ByteData(newLength);
       new Uint8List.view(newData.buffer)
           .setRange(0, oldLength, new Uint8List.view(_data.buffer));
       _data = newData;
     }
   }
 }