diff --git a/src/bonsai/bonsai/bim/module/qto/operator.py b/src/bonsai/bonsai/bim/module/qto/operator.py
index eb2ccda2820..c8d32b58297 100644
--- a/src/bonsai/bonsai/bim/module/qto/operator.py
+++ b/src/bonsai/bonsai/bim/module/qto/operator.py
@@ -22,6 +22,7 @@
 import bonsai.tool as tool
 import bonsai.core.qto as core
 from bonsai.bim.module.qto import helper
+from ifcopenshell.util.profiler import Profiler
 
 
 class CalculateCircleRadius(bpy.types.Operator):
@@ -148,7 +149,8 @@ def _execute(self, context):
         }
 
         ifc_file = tool.Ifc.get()
-        results = ifc5d.qto.quantify(ifc_file, elements, rules)
+        with(Profiler("Quantify function time:")):
+            results = ifc5d.qto.quantify(ifc_file, elements, rules)
         ifc5d.qto.edit_qtos(ifc_file, results)
 
         not_quantified_elements = elements - set(results.keys())
@@ -190,7 +192,8 @@ def run_quantification(
         ) -> set[ifcopenshell.entity_instance]:
             rules = ifc5d.qto.rules[rule]
             ifc_file = tool.Ifc.get()
-            results = ifc5d.qto.quantify(ifc_file, elements, rules)
+            with(Profiler("Quantify function time:")):
+                results = ifc5d.qto.quantify(ifc_file, elements, rules)
             ifc5d.qto.edit_qtos(ifc_file, results)
             not_quantified_elements = elements - set(results.keys())
             return not_quantified_elements
diff --git a/src/ifcopenshell-python/ifcopenshell/util/profiler.py b/src/ifcopenshell-python/ifcopenshell/util/profiler.py
new file mode 100644
index 00000000000..aabfe37977a
--- /dev/null
+++ b/src/ifcopenshell-python/ifcopenshell/util/profiler.py
@@ -0,0 +1,34 @@
+# IfcOpenShell - IFC toolkit and geometry engine
+# Copyright (C) 2021 Dion Moult <dion@thinkmoult.com>
+#
+# This file is part of IfcOpenShell.
+#
+# IfcOpenShell is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# IfcOpenShell is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with IfcOpenShell.  If not, see <http://www.gnu.org/licenses/>.
+
+
+from timeit import default_timer as timer
+
+class Profiler:
+    """
+    A python context manager timing utility, useful for measure functions performances
+    """
+
+    def __init__(self, task):
+        self.task = task
+
+    def __enter__(self):
+        self.start = timer()
+
+    def __exit__(self, *args):
+        print(f"{self.task} {timer() - self.start:.6f} s")