Improve hot reload test mode

runtime/bin/main.cc

Index: runtime/bin/main.cc
diff --git a/runtime/bin/main.cc b/runtime/bin/main.cc
index c5969f7b7f307af4f86809ec2b730c4d188d4884..3a0de8a43a4369d0e5f41a9ca5c0934ffe93bf7d 100644
--- a/runtime/bin/main.cc
+++ b/runtime/bin/main.cc
@@ -446,12 +446,12 @@ static bool ProcessHotReloadTestModeOption(const char* arg,
   // Identity reload.
   vm_options->AddArgument("--identity_reload");
   // Start reloading quickly.
-  vm_options->AddArgument("--reload_every=10");
+  vm_options->AddArgument("--reload_every=5");
   // Reload from optimized and unoptimized code.
   vm_options->AddArgument("--reload_every_optimized=false");
   // Reload less frequently as time goes on.
   vm_options->AddArgument("--reload_every_back_off");
-  // Ensure that an isolate has reloaded once.
+  // Ensure that every isolate has reloaded once before exiting.
   vm_options->AddArgument("--check_reloaded");
 
   return true;