diff --git a/src/deptree.cpp b/src/deptree.cpp
index 56ca8f4..503a749 100644
--- a/src/deptree.cpp
+++ b/src/deptree.cpp
@@ -1,7 +1,6 @@
 #include "deptree.h"
-#include "globals.h"
 
-int DepTree::CreateNodeFromVar(const std::string& var, std::set<std::string>& used, std::set<DepTree*>& callstack)
+int DepTree::CreateNodeFromVar(const std::string& var, UsedType& used, CallStack& callstack)
 {
  COUT(DEBUG)<<"DepTree::CreateNodeFromVar "<<var<<std::endl;
  if(G_vars.count(var)==0)
@@ -10,7 +9,7 @@ int DepTree::CreateNodeFromVar(const std::string& var, std::set<std::string>& us
   return 1;
  }
 
- std::set<std::string> ids;
+ UsedType ids;
 
  used.insert(var);
  G_vars[var]->UsedIdents(ids);
@@ -51,7 +50,7 @@ int DepTree::CreateNodeFromVar(const std::string& var, std::set<std::string>& us
 }
 
 
-int DepTree::CreateNodeFromSP(DepTree::NodeType list, std::vector<ObjectList*>::size_type ind, std::set<std::string>& used)
+int DepTree::CreateNodeFromSP(DepTree::NodeType list, G_toType::size_type ind, UsedType& used)
 {
  if(list!=DepTree::SAVE && list!=DepTree::PRINT)
  {
@@ -61,7 +60,7 @@ int DepTree::CreateNodeFromSP(DepTree::NodeType list, std::vector<ObjectList*>::
  COUT(DEBUG)<<"DepTree::CreateNodeFromSP "<<((list==DepTree::SAVE)?G_tosave:G_toprint)[ind]->Dump()<<std::endl;
 
  std::set<std::string> ids;
- std::set<DepTree*> callstack;
+ CallStack callstack;
 
  type=list;
  index=ind;
@@ -95,7 +94,7 @@ int DepTree::CreateNodeFromSP(DepTree::NodeType list, std::vector<ObjectList*>::
 }
 
 
-int DepTree::CreateGlobalTree(std::set<std::string>& used)
+int DepTree::CreateGlobalTree(UsedType& used)
 {
  if(parents.size()!=0)
  {
diff --git a/src/deptree.h b/src/deptree.h
index 99718f8..274b73b 100644
--- a/src/deptree.h
+++ b/src/deptree.h
@@ -3,20 +3,22 @@
 #include <set>
 #include <vector>
 #include <string>
-#include "object.h"
+#include "globals.h"
 
 class DepTree
 {
  enum NodeType {NOTDEF,ROOT,SAVE,PRINT,VAR};
 
- std::set<DepTree*> parents;
- std::set<DepTree*> childrens;
+ typedef std::set<DepTree*> NodeVector;
+ typedef std::set<DepTree*> CallStack;
+ NodeVector parents;
+ NodeVector childrens;
  NodeType type;
- std::vector<ObjectList*>::size_type index;
+ G_toType::size_type index;
  std::string name;
 
- int CreateNodeFromVar(const std::string& var, std::set<std::string>& used, std::set<DepTree*>& callstack);
- int CreateNodeFromSP(NodeType list, std::vector<ObjectList*>::size_type ind, std::set<std::string>& used);
+ int CreateNodeFromVar(const std::string& var, UsedType& used, CallStack& callstack);
+ int CreateNodeFromSP(NodeType list, G_toType::size_type ind, UsedType& used);
  DepTree* FindNodeByVarFromCurrent(const std::string& var) const;
  DepTree* FindNodeByVar(const std::string& var) const;
 public:
@@ -32,7 +34,7 @@ public:
   }
  }
 
- int CreateGlobalTree(std::set<std::string>& used);
+ int CreateGlobalTree(UsedType& used);
 };
 
 #endif
diff --git a/src/globals.cpp b/src/globals.cpp
index 226861a..d460156 100644
--- a/src/globals.cpp
+++ b/src/globals.cpp
@@ -1,16 +1,17 @@
 #include "globals.h"
 
+
 // Variables definitions
-std::map<std::string,ObjectBase*> G_vars;
+G_varsType G_vars;
 
 // Functions addresses
-std::multimap<std::string,Func> G_funcs;
+G_funcsType G_funcs;
 
 // List of objects to save
-std::vector<ObjectList*> G_tosave;
+G_toType G_tosave;
 
 // List of objects to print
-std::vector<ObjectList*> G_toprint;
+G_toType G_toprint;
 
 void ClearGlobals()
 {
diff --git a/src/globals.h b/src/globals.h
index 6bd37cd..77d4c22 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -6,17 +6,20 @@
 #include "object.h"
 
 // Variables definitions
-extern EXPORT std::map<std::string,ObjectBase*> G_vars;
+typedef std::map<std::string,ObjectBase*> G_varsType;
+extern EXPORT G_varsType G_vars;
 
 // Functions addresses
 typedef ObjectBase* (*Func)(ObjectList*);
-extern EXPORT std::multimap<std::string,Func> G_funcs;
+typedef std::multimap<std::string,Func> G_funcsType;
+extern EXPORT G_funcsType G_funcs;
 
+typedef std::vector<ObjectList*> G_toType;
 // List of objects to save
-extern EXPORT std::vector<ObjectList*> EXPORT G_tosave;
+extern EXPORT G_toType G_tosave;
 
 // List of objects to print
-extern EXPORT std::vector<ObjectList*> EXPORT G_toprint;
+extern EXPORT G_toType G_toprint;
 
 void ClearGlobals();
 
diff --git a/src/init.cpp b/src/init.cpp
index ddc8680..dea807e 100644
--- a/src/init.cpp
+++ b/src/init.cpp
@@ -52,7 +52,7 @@ int RegisterArifmeticFunctions()
 }
 
 
-int BuildDepTree(DepTree* deptree,std::set<std::string>& used)
+int BuildDepTree(DepTree* deptree, UsedType& used)
 {
  return deptree->CreateGlobalTree(used);
 }
@@ -60,7 +60,7 @@ int BuildDepTree(DepTree* deptree,std::set<std::string>& used)
 
 int CheckFunctions()
 {
- std::set<std::string> funcs;
+ UsedType funcs;
 
  for(auto& i:G_tosave)
  {
diff --git a/src/init.h b/src/init.h
index ccd52a8..d2578ae 100644
--- a/src/init.h
+++ b/src/init.h
@@ -8,7 +8,7 @@ typedef void* yyscan_t;
 
 int ParseConfigFile(char* config);
 int RegisterArifmeticFunctions();
-int BuildDepTree(DepTree* deptree, std::set<std::string>& used);
+int BuildDepTree(DepTree* deptree, UsedType& used);
 int CheckFunctions();
 void DumpConfig();
 
diff --git a/src/main.cpp b/src/main.cpp
index bdd1f07..d7f0c60 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -21,7 +21,7 @@ int main(int argc, char** argv)
  }
 
  {
-  std::set<std::string> used, all;
+  UsedType used, all;
   for(auto& i:G_vars) all.insert(i.first);
   unsigned int tot=G_vars.size();
 
@@ -43,6 +43,8 @@ int main(int argc, char** argv)
 
  DumpConfig();
 
+ COUT(INFO)<<sizeof(DepTree)<<" "<<sizeof(ObjectList)<<std::endl;
+
  ClearGlobals();
  delete DPTree;
  return 0;
diff --git a/src/object.h b/src/object.h
index 0d8ca51..990ed4a 100644
--- a/src/object.h
+++ b/src/object.h
@@ -16,6 +16,8 @@
 #define IS_OTYPE(quo,equ) (std::type_index(typeid(*quo))==std::type_index(typeid(equ)))
 #define IS_OTYPEI(quo,equ) (std::type_index(typeid(quo))==std::type_index(typeid(equ)))
 
+typedef std::set<std::string> UsedType;
+
 // Base class for all objects
 class EXPORT ObjectBase
 {
@@ -67,8 +69,8 @@ public:
   return true;
  }
  virtual std::string Dump() const {return "%"+Type()+"%";}
- virtual void UsedFuncs(std::set<std::string>& funcs) const {}
- virtual void UsedIdents(std::set<std::string>& ids) const {}
+ virtual void UsedFuncs(UsedType& funcs) const {}
+ virtual void UsedIdents(UsedType& ids) const {}
  virtual ObjectBase* Copy() const=0;
  virtual ObjectBase* Evaluate(bool* err) {*err=false; return 0;}
  virtual ObjectBase* ReplaceVar(const std::string& vname, ObjectBase* ob) {return 0;}
@@ -120,7 +122,7 @@ typedef ObjectSimple<double> ObjectReal;
 typedef ObjectSimple<std::string> ObjectString;
 
 template<>
-inline const int8_t* ObjectSimple<std::string>::Blob(size_t* size) const
+inline const int8_t* ObjectString::Blob(size_t* size) const
 {
  *size=val.length();
  return reinterpret_cast<const int8_t*>(val.c_str());
@@ -153,8 +155,8 @@ public:
  const ObjectBase* Value() const {return val.get();}
  void SetPair(const std::string& n, ObjectBase* v) {if(!Exist()) {name=n; val.reset(v);}}
  std::string Dump() const override { return Name()+"="+val->Dump(); }
- void UsedFuncs(std::set<std::string>& funcs) const override {return val->UsedFuncs(funcs);}
- void UsedIdents(std::set<std::string>& ids) const override {return val->UsedIdents(ids);}
+ void UsedFuncs(UsedType& funcs) const override {return val->UsedFuncs(funcs);}
+ void UsedIdents(UsedType& ids) const override {return val->UsedIdents(ids);}
  ObjectBase* Copy() const override
  {
   auto ret=new ObjectPair;
@@ -218,8 +220,8 @@ public:
   if(vals->size()!=0) s.resize(s.length()-2);
   return s+")";
  }
- void UsedFuncs(std::set<std::string>& funcs) const override {for(auto& i: *vals) i->UsedFuncs(funcs);}
- void UsedIdents(std::set<std::string>& ids) const override {for(auto& i: *vals) i->UsedIdents(ids);}
+ void UsedFuncs(UsedType& funcs) const override {for(auto& i: *vals) i->UsedFuncs(funcs);}
+ void UsedIdents(UsedType& ids) const override {for(auto& i: *vals) i->UsedIdents(ids);}
  ObjectBase* Copy() const override
  {
   auto ret=new ObjectList;
@@ -287,7 +289,7 @@ public:
  std::string Name() const {return name;}
  void SetName(const std::string& s) {name=s;}
  std::string Dump() const override {return name;};
- void UsedIdents(std::set<std::string>& ids) const override {ids.insert(name);}
+ void UsedIdents(UsedType& ids) const override {ids.insert(name);}
  ObjectBase* Copy() const override
  {
   COUT(WARNING)<<"OId::Copy: this call must never be happens."<<std::endl;
@@ -328,8 +330,8 @@ public:
  std::string Name() const {return name;}
  void SetName(std::string s) {name=s;}
  std::string Dump() const override {return Name()+args->Dump();};
- void UsedFuncs(std::set<std::string>& funcs) const override {funcs.insert(name); args->UsedFuncs(funcs);}
- void UsedIdents(std::set<std::string>& ids) const override {args->UsedIdents(ids);}
+ void UsedFuncs(UsedType& funcs) const override {funcs.insert(name); args->UsedFuncs(funcs);}
+ void UsedIdents(UsedType& ids) const override {args->UsedIdents(ids);}
  ObjectBase* Copy() const override
  {
   COUT(WARNING)<<"OFunc::Copy: this call must never be happens."<<std::endl;