diff --git a/CHANGES.rst b/CHANGES.rst
index ebd9471468..5f1d531ac6 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -5,6 +5,7 @@ Changelog
 2.3.0 (unreleased)
 ------------------
 
+- #2148 Performance: prioritize raw getter for AllowedInstruments field
 - #2147 Remove stale function workflow.getReviewHistory
 - #2146 Fix "No object found for UID: <laboratory_uid>" in report preview
 - #2145 Crop page navigation for DX reference widget
diff --git a/src/bika/lims/browser/analyses/view.py b/src/bika/lims/browser/analyses/view.py
index 944a209d43..df67e9e393 100644
--- a/src/bika/lims/browser/analyses/view.py
+++ b/src/bika/lims/browser/analyses/view.py
@@ -1532,13 +1532,13 @@ def is_instrument_required(self, analysis):
         # If method selection list is required, the instrument selection too
         if self.is_method_required(analysis):
             return True
-        
+
         # Always return true if the analysis has an instrument assigned
-        if self.get_instrument(analysis):
+        analysis = self.get_object(analysis)
+        if analysis.getRawInstrument():
             return True
 
-        obj = self.get_object(analysis)
-        instruments = obj.getAllowedInstruments()
+        instruments = analysis.getRawAllowedInstruments()
         # There is no need to check for the instruments of the method assigned
         # to # the analysis (if any), because the instruments rendered in the
         # selection list are always a subset of the allowed instruments when
diff --git a/src/bika/lims/content/abstractanalysis.py b/src/bika/lims/content/abstractanalysis.py
index 848c8fba6b..b6b5ea6034 100644
--- a/src/bika/lims/content/abstractanalysis.py
+++ b/src/bika/lims/content/abstractanalysis.py
@@ -728,7 +728,7 @@ def isInstrumentAllowed(self, instrument):
         :rtype: bool
         """
         uid = api.get_uid(instrument)
-        return uid in map(api.get_uid, self.getAllowedInstruments())
+        return uid in self.getRawAllowedInstruments()
 
     @security.public
     def isMethodAllowed(self, method):
@@ -768,6 +768,15 @@ def getAllowedInstruments(self):
             return []
         return service.getInstruments()
 
+    @security.public
+    def getRawAllowedInstruments(self):
+        """Returns the UIDS of the allowed instruments from the service
+        """
+        service = self.getAnalysisService()
+        if not service:
+            return []
+        return service.getRawInstruments()
+
     @security.public
     def getExponentialFormatPrecision(self, result=None):
         """ Returns the precision for the Analysis Service and result
diff --git a/src/bika/lims/content/abstractbaseanalysis.py b/src/bika/lims/content/abstractbaseanalysis.py
index 44b314185b..cd2cf386f8 100644
--- a/src/bika/lims/content/abstractbaseanalysis.py
+++ b/src/bika/lims/content/abstractbaseanalysis.py
@@ -963,11 +963,7 @@ def getRawInstrument(self):
 
         :returns: Instrument UID
         """
-        field = self.getField("Instrument")
-        instrument = field.getRaw(self)
-        if not instrument:
-            return None
-        return instrument
+        return self.getField("Instrument").getRaw(self)
 
     @security.public
     def getInstrumentUID(self):