diff --git a/js/src/jstracer.cpp b/js/src/jstracer.cpp
index f4232e130b99..a264ad4943e1 100644
--- a/js/src/jstracer.cpp
+++ b/js/src/jstracer.cpp
@@ -5000,7 +5000,6 @@ AttemptToExtendTree(JSContext* cx, VMSideExit* anchor, VMSideExit* exitedFrom, j
                           " LINE=%d ANCHOR=%p OFFS=%d\n",
                           f, c, cx->fp->regs->pc, cx->fp->script->filename,
                           js_FramePCToLineNumber(cx, cx->fp), anchor, FramePCOffset(cx->fp));
-        c->spawnedFrom = anchor;
         c->parent = f;
         anchor->target = c;
         c->root = f;
diff --git a/js/src/nanojit/Assembler.cpp b/js/src/nanojit/Assembler.cpp
index 23a44bab4895..a95b35f6b99d 100644
--- a/js/src/nanojit/Assembler.cpp
+++ b/js/src/nanojit/Assembler.cpp
@@ -735,7 +735,6 @@ namespace nanojit
             prev = &vbr;
         )
 
-        verbose_only(_thisfrag->compileNbr++; )
         _inExit = false;
 
         LabelStateMap labels(alloc);
diff --git a/js/src/nanojit/Fragmento.cpp b/js/src/nanojit/Fragmento.cpp
index bde86e9559f3..f16eb330553f 100644
--- a/js/src/nanojit/Fragmento.cpp
+++ b/js/src/nanojit/Fragmento.cpp
@@ -53,22 +53,6 @@ namespace nanojit
     //
     Fragment::Fragment(const void* _ip)
         :
-#ifdef NJ_VERBOSE
-          _called(0),
-          _native(0),
-          _exitNative(0),
-          _lir(0),
-          _lirbytes(0),
-          _token(NULL),
-          traceTicks(0),
-          interpTicks(0),
-          eot_target(NULL),
-          sid(0),
-          compileNbr(0),
-#endif
-          treeBranches(NULL),
-          branches(NULL),
-          nextbranch(NULL),
           anchor(NULL),
           root(NULL),
           parent(NULL),
@@ -76,11 +60,8 @@ namespace nanojit
           peer(NULL),
           lirbuf(NULL),
           lastIns(NULL),
-          spawnedFrom(NULL),
           kind(LoopTrace),
           ip(_ip),
-          guardCount(0),
-          xjumpCount(0),
           recordAttempts(0),
           fragEntry(NULL),
           loopEntry(NULL),
diff --git a/js/src/nanojit/Fragmento.h b/js/src/nanojit/Fragmento.h
index 34b96db94f4c..d1cc9154d508 100644
--- a/js/src/nanojit/Fragmento.h
+++ b/js/src/nanojit/Fragmento.h
@@ -65,41 +65,22 @@ namespace nanojit
         public:
             Fragment(const void*);
 
-            NIns*            code()                            { return _code; }
-            void            setCode(NIns* codee)               { _code = codee; }
-            int32_t&        hits()                             { return _hits; }
+            NIns*           code()                          { return _code; }
+            void            setCode(NIns* codee)            { _code = codee; }
+            int32_t&        hits()                          { return _hits; }
             bool            isAnchor() { return anchor == this; }
             bool            isRoot() { return root == this; }
 
-            verbose_only( uint32_t        _called; )
-            verbose_only( uint32_t        _native; )
-            verbose_only( uint32_t      _exitNative; )
-            verbose_only( uint32_t        _lir; )
-            verbose_only( uint32_t        _lirbytes; )
-            verbose_only( const char*    _token; )
-            verbose_only( uint64_t      traceTicks; )
-            verbose_only( uint64_t      interpTicks; )
-            verbose_only( DWB(Fragment*) eot_target; )
-            verbose_only( uint32_t        sid;)
-            verbose_only( uint32_t        compileNbr;)
-
-            DWB(Fragment*) treeBranches;
-            DWB(Fragment*) branches;
-            DWB(Fragment*) nextbranch;
-            DWB(Fragment*) anchor;
-            DWB(Fragment*) root;
-            DWB(Fragment*) parent;
-            DWB(Fragment*) first;
-            DWB(Fragment*) peer;
+            Fragment*      anchor;
+            Fragment*      root;
+            Fragment*      parent;
+            Fragment*      first;
+            Fragment*      peer;
             LirBuffer*     lirbuf;
             LIns*          lastIns;
-            SideExit*      spawnedFrom;
-            GuardRecord*   outbound;
 
             TraceKind kind;
             const void* ip;
-            uint32_t guardCount;
-            uint32_t xjumpCount;
             uint32_t recordAttempts;
             NIns* fragEntry;
             NIns* loopEntry;