clang/win: Temporarily slow down renderer startup by 0.1s

content/renderer/renderer_main.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stddef.h>
 #include <utility>
 
 #include "base/base_switches.h"
 #include "base/command_line.h"
 #include "base/debug/debugger.h"
@@ skipping 80 matching lines @@
 // mainline routine for running as the Renderer process
 int RendererMain(const MainFunctionParams& parameters) {
   // Don't use the TRACE_EVENT0 macro because the tracing infrastructure doesn't
   // expect synchronous events around the main loop of a thread.
   TRACE_EVENT_ASYNC_BEGIN0("startup", "RendererMain", 0);
 
   base::trace_event::TraceLog::GetInstance()->SetProcessName("Renderer");
   base::trace_event::TraceLog::GetInstance()->SetProcessSortIndex(
       kTraceEventRendererProcessSortIndex);
 
+#if defined(OS_WIN) && defined(__clang__)
+  // TODO(thakis): Remove this again soon, it's here to check what effect
+  // renderer startup delays have on a particular metric in the next dev
+  // channel release.
+  base::PlatformThread::Sleep(base::TimeDelta::FromMilliseconds(100));
+#endif
+
   const base::CommandLine& parsed_command_line = parameters.command_line;
 
 #if defined(OS_MACOSX)
   base::mac::ScopedNSAutoreleasePool* pool = parameters.autorelease_pool;
 #endif  // OS_MACOSX
 
 #if defined(OS_CHROMEOS)
   // As Zygote process starts up earlier than browser process gets its own
   // locale (at login time for Chrome OS), we have to set the ICU default
   // locale for renderer process here.
@@ skipping 114 matching lines @@
     // ignore shutdown-only leaks.
     __lsan_do_leak_check();
 #endif
   }
   platform.PlatformUninitialize();
   TRACE_EVENT_ASYNC_END0("startup", "RendererMain", 0);
   return 0;
 }
 
 }  // namespace content