guitargeek · Aug 4, 2026 · Aug 1, 2026
@@ -53,6 +53,7 @@ The following people have contributed to this new version:
 * The ROOT IO capability for the `TMVA::Experimental::RBDT` class has been removed, along with the `TMVA.Experimental.SaveXGBoost` Python function. Experimental classes should not be persistified since their on-disk layout is not guaranteed to be stable. An `RBDT` is now built directly from an XGBoost model in its native JSON serialization with the new `TMVA::Experimental::RBDT::LoadXGBoost(jsonPath)`, which works both from C++ and Python. To convert a trained model, save it first with XGBoost's `Booster.save_model("model.json")` and then load it with `LoadXGBoost`.
 * The **JsMVA** feature for interactive TMVA training in Jupyter notebooks is now removed. It was not functional for years and was therefore already excluded from ROOT 6.38. This also removes the `TMVA::IPythonInteractive` class and the related interactive-training interfaces from the TMVA method and fitter classes, such as `MethodBase::ExitFromTraining()` or `FitterBase::SetIPythonInteractive()`.
 * The **RooStats::DebuggingSampler** and **RooStats::DebuggingTestStat** classes are removed. They were mock implementations of the `TestStatSampler` and `TestStatistic` interfaces that returned uniform random numbers independent of the data, only meant for debugging the RooStats framework itself during its initial development.
+* The `RooTrace` class is deprecated and will be removed in ROOT 6.44. It was a RooFit-specific memory tracer whose instrumentation hooks are compiled out by default, so it has been inert and untested for years. For memory debugging, please use general-purpose tools such as AddressSanitizer or Valgrind instead.
 
 ## Python Interface
 

@@ -16,7 +16,6 @@
  */
 
 #include <RooMsgService.h>
-#include <RooTrace.h>
 
 #include <RooFit/Detail/MathFuncs.h>
 #include <RooStats/HistFactory/FlexibleInterpVar.h>
@@ -36,7 +35,6 @@ using namespace HistFactory;
 
 FlexibleInterpVar::FlexibleInterpVar()
 {
-  TRACE_CREATE;
 }
 
 
@@ -82,7 +80,6 @@ FlexibleInterpVar::FlexibleInterpVar(const char* name, const char* title,
      R__ASSERT(_low.size() == _interpCode.size());
   }
 
-  TRACE_CREATE;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -92,7 +89,6 @@ FlexibleInterpVar::FlexibleInterpVar(const char* name, const char* title) :
   RooAbsReal(name, title),
   _paramList("paramList","List of coefficients",this)
 {
-  TRACE_CREATE;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -103,7 +99,6 @@ FlexibleInterpVar::FlexibleInterpVar(const FlexibleInterpVar& other, const char*
   _nominal(other._nominal), _low(other._low), _high(other._high), _interpCode(other._interpCode), _interpBoundary(other._interpBoundary)
 
 {
-  TRACE_CREATE;
 }
 
 
@@ -112,7 +107,6 @@ FlexibleInterpVar::FlexibleInterpVar(const FlexibleInterpVar& other, const char*
 
 FlexibleInterpVar::~FlexibleInterpVar()
 {
-  TRACE_DESTROY;
 }
 
 void FlexibleInterpVar::setInterpCode(RooAbsReal &param, int code)

@@ -52,7 +52,6 @@
 #include "RooRealVar.h"
 #include "RooMsgService.h"
 #include "RooNumIntConfig.h"
-#include "RooTrace.h"
 #include "RooDataHist.h"
 #include "RooHistFunc.h"
 
@@ -65,7 +64,6 @@
 
 PiecewiseInterpolation::PiecewiseInterpolation() : _normIntMgr(this)
 {
-  TRACE_CREATE;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -130,7 +128,6 @@ PiecewiseInterpolation::PiecewiseInterpolation(const char *name, const char *tit
 
   // Choose special integrator by default
   specialIntegratorConfig(true)->method1D().setLabel("RooBinIntegrator") ;
-  TRACE_CREATE;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -174,7 +171,6 @@ PiecewiseInterpolation::PiecewiseInterpolation(const PiecewiseInterpolation& oth
   _interpCode(other._interpCode)
 {
   // Member _ownedList is intentionally not copy-constructed -- ownership is not transferred
-  TRACE_CREATE;
 }
 
 
@@ -184,7 +180,6 @@ PiecewiseInterpolation::PiecewiseInterpolation(const PiecewiseInterpolation& oth
 
 PiecewiseInterpolation::~PiecewiseInterpolation()
 {
-  TRACE_DESTROY;
 }
 
 

@@ -14,7 +14,6 @@
 #include "RooCategoryProxy.h"
 #include "RooAbsReal.h"
 #include "RooAbsCategory.h"
-#include "RooTrace.h"
 
 class RooPoisson : public RooAbsPdf {
 public:

@@ -40,7 +40,6 @@ Cranmer KS, Kernel Estimation in High-Energy Physics.
 #include "RooRealVar.h"
 #include "RooRandom.h"
 #include "RooDataSet.h"
-#include "RooTrace.h"
 
 #include "TError.h"
 
@@ -53,7 +52,6 @@ const double RooKeysPdf::_nSigma = std::sqrt(-2. *
 
 RooKeysPdf::RooKeysPdf()
 {
-   TRACE_CREATE;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -84,7 +82,6 @@ RooKeysPdf::RooKeysPdf(const char *name, const char *title, RooAbsReal &xpdf, Ro
 
   // form the lookup table
   LoadDataSet(data);
-  TRACE_CREATE;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -117,7 +114,6 @@ RooKeysPdf::RooKeysPdf(const RooKeysPdf &other, const char *name)
   for (Int_t i= 0; i<_nPoints+1; i++)
     _lookupTable[i]= other._lookupTable[i];
 
-  TRACE_CREATE;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -127,7 +123,6 @@ RooKeysPdf::~RooKeysPdf() {
   delete[] _dataWgts;
   delete[] _weights;
 
-  TRACE_DESTROY;
 }
 
 ////////////////////////////////////////////////////////////////////////////////

@@ -1815,7 +1815,6 @@ RooLagrangianMorphFunc::RooLagrangianMorphFunc(const char *name, const char *tit
    this->disableInterferences(_config.nonInterfering);
    this->setup(false);
 
-   TRACE_CREATE;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -1946,7 +1945,6 @@ RooLagrangianMorphFunc::RooLagrangianMorphFunc(const RooLagrangianMorphFunc &oth
       }
       _diagrams.push_back(diagram);
    }
-   TRACE_CREATE;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -1973,7 +1971,6 @@ RooLagrangianMorphFunc::RooLagrangianMorphFunc()
      _observables("observable", "morphing observable", this, true, false),
      _binWidths("binWidths", "set of bin width objects", this, true, false)
 {
-   TRACE_CREATE;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -1986,7 +1983,6 @@ RooLagrangianMorphFunc::~RooLagrangianMorphFunc()
          delete vertex;
       }
    }
-   TRACE_DESTROY;
 }
 
 ////////////////////////////////////////////////////////////////////////////////

@@ -46,7 +46,6 @@ using std::string, std::vector;
 //_____________________________________________________________________________
 RooMomentMorphFuncND::RooMomentMorphFuncND() : _cacheMgr(this, 10, true, true), _setting(RooMomentMorphFuncND::Linear), _useHorizMorph(true)
 {
-   TRACE_CREATE;
 }
 
 //_____________________________________________________________________________
@@ -72,7 +71,6 @@ RooMomentMorphFuncND::RooMomentMorphFuncND(const char *name, const char *title,
    // general initialization
    initialize();
 
-   TRACE_CREATE;
 }
 
 //_____________________________________________________________________________
@@ -112,7 +110,6 @@ RooMomentMorphFuncND::RooMomentMorphFuncND(const char *name, const char *title,
    // general initialization
    initialize();
 
-   TRACE_CREATE;
 }
 
 //_____________________________________________________________________________
@@ -167,7 +164,6 @@ RooMomentMorphFuncND::RooMomentMorphFuncND(const char *name, const char *title,
    // general initialization
    initialize();
 
-   TRACE_CREATE;
 }
 
 //_____________________________________________________________________________
@@ -185,13 +181,11 @@ RooMomentMorphFuncND::RooMomentMorphFuncND(const RooMomentMorphFuncND &other, co
    // general initialization
    initialize();
 
-   TRACE_CREATE;
 }
 
 //_____________________________________________________________________________
 RooMomentMorphFuncND::~RooMomentMorphFuncND()
 {
-   TRACE_DESTROY;
 }
 
 //_____________________________________________________________________________

@@ -22,7 +22,6 @@
 #include "RooAICRegistry.h"
 #include "RooObjCacheManager.h"
 #include "RooNameReg.h"
-#include "RooTrace.h"
 
 #include <vector>
 #include <list>
@@ -33,7 +32,7 @@ class AddCacheElem;
 class RooAddPdf : public RooAbsPdf {
 public:
 
-  RooAddPdf() : _projCacheMgr(this,10) { TRACE_CREATE; }
+  RooAddPdf() : _projCacheMgr(this,10) {}
   RooAddPdf(const char *name, const char *title=nullptr);
   RooAddPdf(const char *name, const char *title,
             RooAbsPdf& pdf1, RooAbsPdf& pdf2, RooAbsReal& coef1) ;
@@ -42,7 +41,7 @@ class RooAddPdf : public RooAbsPdf {
 
   RooAddPdf(const RooAddPdf& other, const char* name=nullptr) ;
   TObject* clone(const char* newname=nullptr) const override { return new RooAddPdf(*this,newname) ; }
-  ~RooAddPdf() override { TRACE_DESTROY; }
+  ~RooAddPdf() override {}
 
   bool checkObservables(const RooArgSet* nset) const override;
 

@@ -19,7 +19,6 @@
 #include "RooAbsReal.h"
 #include "RooArgList.h"
 #include "RooListProxy.h"
-#include "RooTrace.h"
 #include "RooAbsBinning.h"
 
 #include <memory>

@@ -20,7 +20,6 @@
 #include "RooRealProxy.h"
 #include "RooSetProxy.h"
 #include "RooAICRegistry.h"
-#include "RooTrace.h"
 #include "RooDataHist.h"
 
 #include <list>

@@ -23,7 +23,9 @@
 #define TRACE_CREATE
 #define TRACE_DESTROY
 
-class RooTrace {
+class R__DEPRECATED(6, 44, "RooTrace is unused and untested, and its hooks are compiled out by default. "
+                            "For memory debugging, please use general-purpose tools like AddressSanitizer "
+                            "or Valgrind instead.") RooTrace {
 public:
   RooTrace() ;
   virtual ~RooTrace() {} ;

@@ -81,7 +81,6 @@ for single nodes.
 #include <RooRealIntegral.h>
 #include <RooResolutionModel.h>
 #include <RooSetProxy.h>
-#include <RooTrace.h>
 #include <RooTreeDataStore.h>
 #include <RooVectorDataStore.h>
 #include <RooWorkspace.h>

@@ -34,7 +34,6 @@ implemented using the container denoted by RooAbsCollection::Storage_t.
 #include "RooAbsRealLValue.h"
 #include "RooAbsCategoryLValue.h"
 #include "RooStringVar.h"
-#include "RooTrace.h"
 #include "RooArgList.h"
 #include "RooLinkedListIter.h"
 #include "RooCmdConfig.h"
@@ -142,7 +141,6 @@ RooAbsCollection::RooAbsCollection(const RooAbsCollection& other, const char *na
   _name(name),
   _allRRV(other._allRRV)
 {
-  RooTrace::create(this) ;
   if (!name) setName(other.GetName()) ;
 
   _list.reserve(other._list.size());

@@ -99,7 +99,6 @@ observable snapshots are stored in the dataset.
 #include "RooDataSet.h"
 #include "RooCompositeDataStore.h"
 #include "RooCategory.h"
-#include "RooTrace.h"
 #include "RooUniformBinning.h"
 #include "RooSimultaneous.h"
 
@@ -150,8 +149,6 @@ RooAbsData::StorageType RooAbsData::getDefaultStorageType( )
 
 RooAbsData::RooAbsData() : storageType(defaultStorageType)
 {
-
-  RooTrace::create(this) ;
 }
 
 void RooAbsData::initializeVars(RooArgSet const& vars)
@@ -199,8 +196,6 @@ RooAbsData::RooAbsData(RooStringView name, RooStringView title, const RooArgSet&
    initializeVars(vars);
 
    _namePtr = RooNameReg::instance().constPtr(GetName()) ;
-
-   RooTrace::create(this);
 }
 
 void RooAbsData::copyImpl(const RooAbsData &other, const char *newName)
@@ -250,8 +245,6 @@ RooAbsData::RooAbsData(const RooAbsData &other, const char *newName)
      _cachedVars{"Cached Variables"}
 {
    copyImpl(other, newName);
-
-   RooTrace::create(this);
 }
 
 RooAbsData &RooAbsData::operator=(const RooAbsData &other)
@@ -285,8 +278,6 @@ RooAbsData::~RooAbsData()
   for (auto& item : _ownedComponents) {
     delete item.second;
   }
-
-  RooTrace::destroy(this) ;
 }
 
 ////////////////////////////////////////////////////////////////////////////////

@@ -61,7 +61,6 @@ parallelized calculation of test statistics.
 #include "RooProduct.h"
 #include "RooRealSumPdf.h"
 #include "RooRealVar.h"
-#include "RooTrace.h"
 #include "RooVectorDataStore.h"
 
 #include "ROOT/StringUtils.hxx"

@@ -104,7 +104,6 @@ RooAddPdf::RooAddPdf(const char *name, const char *title) :
   _coefList("!coefficients","List of coefficients",this),
   _coefErrCount{_errorCount}
 {
-  TRACE_CREATE;
 }
 
 
@@ -302,7 +301,6 @@ RooAddPdf::RooAddPdf(const RooAddPdf &other, const char *name)
 {
 
   finalizeConstruction();
-  TRACE_CREATE;
 }