--- a/mozglue/linker/CustomElf.cpp
+++ b/mozglue/linker/CustomElf.cpp
@@ -253,17 +253,19 @@ CustomElf::Load(Mappable *mappable, cons
     return nullptr;
 
 #ifdef __ARM_EABI__
   if (arm_exidx_phdr)
     elf->arm_exidx.InitSize(elf->GetPtr(arm_exidx_phdr->p_vaddr),
                             arm_exidx_phdr->p_memsz);
 #endif
 
-  elf->stats("oneLibLoaded");
+  if (MOZ_UNLIKELY(Logging::isVerbose())) {
+    elf->stats("oneLibLoaded");
+  }
   DEBUG_LOG("CustomElf::Load(\"%s\", 0x%x) = %p", path, flags,
             static_cast<void *>(elf));
   return elf;
 }
 
 CustomElf::~CustomElf()
 {
   DEBUG_LOG("CustomElf::~CustomElf(%p [\"%s\"])",

--- a/mozglue/linker/CustomElf.h
+++ b/mozglue/linker/CustomElf.h
@@ -47,17 +47,17 @@ protected:
   virtual Mappable *GetMappable() const;
 
 public:
   /**
    * Shows some stats about the Mappable instance. The when argument is to be
    * used by the caller to give an identifier of the when the stats call is
    * made.
    */
-  void stats(const char *when) const;
+  virtual void stats(const char *when) const;
 
 private:
   /**
    * Scan dependent libraries to find the address corresponding to the
    * given symbol name. This is used to find symbols that are undefined
    * in the Elf object.
    */
   void *GetSymbolPtrInDeps(const char *symbol) const;

--- a/mozglue/linker/ElfLoader.cpp
+++ b/mozglue/linker/ElfLoader.cpp
@@ -568,20 +568,22 @@ ElfLoader::~ElfLoader()
    * belong to it. */
   if (self_elf)
     self_elf->base.release();
 }
 
 void
 ElfLoader::stats(const char *when)
 {
+  if (MOZ_LIKELY(!Logging::isVerbose()))
+    return;
+
   for (LibHandleList::iterator it = Singleton.handles.begin();
        it < Singleton.handles.end(); ++it)
-    if (!(*it)->IsSystemElf())
-      static_cast<CustomElf *>(*it)->stats(when);
+    (*it)->stats(when);
 }
 
 #ifdef __ARM_EABI__
 int
 ElfLoader::__wrap_aeabi_atexit(void *that, ElfLoader::Destructor destructor,
                                void *dso_handle)
 {
   Singleton.destructors.push_back(

--- a/mozglue/linker/ElfLoader.h
+++ b/mozglue/linker/ElfLoader.h
@@ -198,16 +198,23 @@ public:
 #ifdef __ARM_EABI__
   /**
    * Find the address and entry count of the ARM.exidx section
    * associated with the library
    */
   virtual const void *FindExidx(int *pcount) const = 0;
 #endif
 
+  /**
+   * Shows some stats about the Mappable instance. The when argument is to be
+   * used by the caller to give an identifier of the when the stats call is
+   * made.
+   */
+  virtual void stats(const char *when) const { };
+
 protected:
   /**
    * Returns a mappable object for use by MappableMMap and related functions.
    */
   virtual Mappable *GetMappable() const = 0;
 
   /**
    * Returns whether the handle is a SystemElf or not. (short of a better way