diff --git a/include/llvm/Support/Timer.h b/include/llvm/Support/Timer.h
index 9a8247071c3..584199f4400 100644
--- a/include/llvm/Support/Timer.h
+++ b/include/llvm/Support/Timer.h
@@ -152,7 +152,6 @@ class TimerGroup {
   unsigned NumTimers;
   std::vector<Timer> TimersToPrint;
 public:
-  TimerGroup() : Name("Miscellaneous Ungrouped Timers"), NumTimers(0) {}
   explicit TimerGroup(const std::string &name) : Name(name), NumTimers(0) {}
   ~TimerGroup() {
     assert(NumTimers == 0 &&
diff --git a/lib/Support/Timer.cpp b/lib/Support/Timer.cpp
index c4920f0ba57..3c8879bd06e 100644
--- a/lib/Support/Timer.cpp
+++ b/lib/Support/Timer.cpp
@@ -15,7 +15,6 @@
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/Streams.h"
-#include "llvm/System/Mutex.h"
 #include "llvm/System/Process.h"
 #include <algorithm>
 #include <fstream>
@@ -51,28 +50,25 @@ namespace {
                    cl::Hidden, cl::location(getLibSupportInfoOutputFilename()));
 }
 
-static ManagedStatic<sys::SmartMutex<true> > TimerLock;
-static ManagedStatic<TimerGroup> DefaultTimerGroup;
+static TimerGroup *DefaultTimerGroup = 0;
 static TimerGroup *getDefaultTimerGroup() {
-  return &*DefaultTimerGroup;
+  if (DefaultTimerGroup) return DefaultTimerGroup;
+  return DefaultTimerGroup = new TimerGroup("Miscellaneous Ungrouped Timers");
 }
 
 Timer::Timer(const std::string &N)
   : Elapsed(0), UserTime(0), SystemTime(0), MemUsed(0), PeakMem(0), Name(N),
     Started(false), TG(getDefaultTimerGroup()) {
-  sys::SmartScopedLock<true> Lock(&*TimerLock);
   TG->addTimer();
 }
 
 Timer::Timer(const std::string &N, TimerGroup &tg)
   : Elapsed(0), UserTime(0), SystemTime(0), MemUsed(0), PeakMem(0), Name(N),
     Started(false), TG(&tg) {
-  sys::SmartScopedLock<true> Lock(&*TimerLock);
   TG->addTimer();
 }
 
 Timer::Timer(const Timer &T) {
-  sys::SmartScopedLock<true> Lock(&*TimerLock);
   TG = T.TG;
   if (TG) TG->addTimer();
   operator=(T);
@@ -81,7 +77,6 @@ Timer::Timer(const Timer &T) {
 
 // Copy ctor, initialize with no TG member.
 Timer::Timer(bool, const Timer &T) {
-  sys::SmartScopedLock<true> Lock(&*TimerLock);
   TG = T.TG;     // Avoid assertion in operator=
   operator=(T);  // Copy contents
   TG = 0;
@@ -89,7 +84,6 @@ Timer::Timer(bool, const Timer &T) {
 
 
 Timer::~Timer() {
-  sys::SmartScopedLock<true> Lock(&*TimerLock);
   if (TG) {
     if (Started) {
       Started = false;
@@ -135,10 +129,8 @@ static TimeRecord getTimeRecord(bool Start) {
 }
 
 static ManagedStatic<std::vector<Timer*> > ActiveTimers;
-static ManagedStatic<sys::SmartMutex<true> > ActiveTimerLock;
 
 void Timer::startTimer() {
-  sys::SmartScopedLock<true> Lock(&*ActiveTimerLock);
   Started = true;
   ActiveTimers->push_back(this);
   TimeRecord TR = getTimeRecord(true);
@@ -150,7 +142,6 @@ void Timer::startTimer() {
 }
 
 void Timer::stopTimer() {
-  sys::SmartScopedLock<true> Lock(&*ActiveTimerLock);
   TimeRecord TR = getTimeRecord(false);
   Elapsed    += TR.Elapsed;
   UserTime   += TR.UserTime;
@@ -180,7 +171,6 @@ void Timer::sum(const Timer &T) {
 /// currently active timers, which will be printed when the timer group prints
 ///
 void Timer::addPeakMemoryMeasurement() {
-  sys::SmartScopedLock<true> Lock(&*ActiveTimerLock);
   size_t MemUsed = getMemUsage();
 
   for (std::vector<Timer*>::iterator I = ActiveTimers->begin(),
@@ -203,10 +193,7 @@ static ManagedStatic<Name2Timer> NamedTimers;
 
 static ManagedStatic<Name2Pair> NamedGroupedTimers;
 
-static ManagedStatic<sys::SmartMutex<true> > NamedTimerLock;
-
 static Timer &getNamedRegionTimer(const std::string &Name) {
-  sys::SmartScopedLock<true> Lock(&*NamedTimerLock);
   Name2Timer::iterator I = NamedTimers->find(Name);
   if (I != NamedTimers->end())
     return I->second;
@@ -216,7 +203,6 @@ static Timer &getNamedRegionTimer(const std::string &Name) {
 
 static Timer &getNamedRegionTimer(const std::string &Name,
                                   const std::string &GroupName) {
-  sys::SmartScopedLock<true> Lock(&*NamedTimerLock);
 
   Name2Pair::iterator I = NamedGroupedTimers->find(GroupName);
   if (I == NamedGroupedTimers->end()) {
@@ -354,7 +340,7 @@ void TimerGroup::removeTimer() {
       // If this is not an collection of ungrouped times, print the total time.
       // Ungrouped timers don't really make sense to add up.  We still print the
       // TOTAL line to make the percentages make sense.
-      if (this != &*DefaultTimerGroup) {
+      if (this != DefaultTimerGroup) {
         *OutStream << "  Total Execution Time: ";
 
         printAlignedFP(Total.getProcessTime(), 4, 5, *OutStream);
@@ -391,5 +377,11 @@ void TimerGroup::removeTimer() {
     if (OutStream != cerr.stream() && OutStream != cout.stream())
       delete OutStream;   // Close the file...
   }
+
+  // Delete default timer group!
+  if (NumTimers == 0 && this == DefaultTimerGroup) {
+    delete DefaultTimerGroup;
+    DefaultTimerGroup = 0;
+  }
 }