commit 43113760f2ea114c183f8965b0d48fbb7469dc7f
author Jens Johansen <jensj@google.com> Wed Nov 28 12:02:21 2018 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> Wed Nov 28 12:02:21 2018 +0000
tree 3b6a4293110c412992b87f9c29027f554a208e7d
parent 25f0c21c81201046436d44d011bfb3f1913c5cfe

Use readAsBytesSync in standard_file_system.dart as it is faster

Timing how long fasta spends on *reading* files when compiling dart2js
(when compiling via the VM) I get a good speedup:

Difference at 95.0% confidence
        -84031.2 +/- 10333.7
        -47.4004% +/- 5.82904%
        (Student's t, pooled s = 7085.44)

Change-Id: I0bb1a1fe6f9d430b47515b9b319069bf810d0aeb
Reviewed-on: https://dart-review.googlesource.com/c/85442
Reviewed-by: Peter von der Ahé <ahe@google.com>
Commit-Queue: Jens Johansen <jensj@google.com>

pkg/front_end/lib/src/api_prototype/standard_file_system.dart

diff --git a/pkg/front_end/lib/src/api_prototype/standard_file_system.dart b/pkg/front_end/lib/src/api_prototype/standard_file_system.dart
index 5be815e..bdd78ad 100644
--- a/pkg/front_end/lib/src/api_prototype/standard_file_system.dart
+++ b/pkg/front_end/lib/src/api_prototype/standard_file_system.dart
@@ -63,7 +63,7 @@
   Future<List<int>> readAsBytes() async {
     try {
       CompilerContext.recordDependency(uri);
-      return await new io.File.fromUri(uri).readAsBytes();
+      return new io.File.fromUri(uri).readAsBytesSync();
     } on io.FileSystemException catch (exception) {
       throw _toFileSystemException(exception);
     }