Move printing snapshot sizes behind a flag.

runtime/vm/clustered_snapshot.cc

 // 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.
 
 #include "vm/clustered_snapshot.h"
 
 #include "platform/assert.h"
 #include "vm/bootstrap.h"
 #include "vm/class_finalizer.h"
 #include "vm/dart.h"
@@ skipping 5289 matching lines @@
   intptr_t num_base_objects;
   if (vm_isolate_snapshot_buffer() != NULL) {
     num_base_objects = WriteVmIsolateSnapshot();
     ASSERT(num_base_objects != 0);
   } else {
     num_base_objects = 0;
   }
 
   WriteIsolateFullSnapshot(num_base_objects);
 
+  if (FLAG_print_snapshot_sizes) {
+    OS::Print("VMIsolate(CodeSize): %" Pd "\n", VmIsolateSnapshotSize());
+    OS::Print("Isolate(CodeSize): %" Pd "\n", IsolateSnapshotSize());
+  }
+  intptr_t total_size = VmIsolateSnapshotSize() + IsolateSnapshotSize();
+
   if (Snapshot::IncludesCode(kind_)) {
     instructions_writer_->Write(
         *vm_isolate_snapshot_buffer_, vm_isolate_snapshot_size_,
         *isolate_snapshot_buffer_, isolate_snapshot_size_);
 
-    OS::Print("VMIsolate(CodeSize): %" Pd "\n", VmIsolateSnapshotSize());
-    OS::Print("Isolate(CodeSize): %" Pd "\n", IsolateSnapshotSize());
-    OS::Print("ReadOnlyData(CodeSize): %" Pd "\n",
-              instructions_writer_->data_size());
-    OS::Print("Instructions(CodeSize): %" Pd "\n",
-              instructions_writer_->text_size());
-    intptr_t total = VmIsolateSnapshotSize() + IsolateSnapshotSize() +
-                     instructions_writer_->data_size() +
-                     instructions_writer_->text_size();
-    OS::Print("Total(CodeSize): %" Pd "\n", total);
+    if (FLAG_print_snapshot_sizes) {
+      OS::Print("ReadOnlyData(CodeSize): %" Pd "\n",
+                instructions_writer_->data_size());
+      OS::Print("Instructions(CodeSize): %" Pd "\n",
+                instructions_writer_->text_size());
+    }
+    total_size +=
+        instructions_writer_->data_size() + instructions_writer_->text_size();
+  }
+
+  if (FLAG_print_snapshot_sizes) {
+    OS::Print("Total(CodeSize): %" Pd "\n", total_size);
   }
 }
 
 
 RawApiError* IsolateSnapshotReader::ReadFullSnapshot() {
   Deserializer deserializer(thread_, kind_, buffer_, size_,
                             instructions_buffer_, data_buffer_);
 
   RawApiError* error = deserializer.VerifyVersionAndFeatures();
   if (error != ApiError::null()) {
@@ skipping 17 matching lines @@
 
   deserializer.ReadVMSnapshot();
 
   Dart::set_instructions_snapshot_buffer(instructions_buffer_);
   Dart::set_data_snapshot_buffer(data_buffer_);
 
   return ApiError::null();
 }
 
 }  // namespace dart