diff --git a/ProcessLib/HydroMechanics/HydroMechanicsFEM-impl.h b/ProcessLib/HydroMechanics/HydroMechanicsFEM-impl.h
index 7f4d723cdc1..c740726f178 100644
--- a/ProcessLib/HydroMechanics/HydroMechanicsFEM-impl.h
+++ b/ProcessLib/HydroMechanics/HydroMechanicsFEM-impl.h
@@ -1046,7 +1046,7 @@ template <typename ShapeFunctionDisplacement, typename ShapeFunctionPressure,
           int DisplacementDim>
 std::size_t HydroMechanicsLocalAssembler<
     ShapeFunctionDisplacement, ShapeFunctionPressure,
-    DisplacementDim>::setIPDataInitialConditions(std::string const& name,
+    DisplacementDim>::setIPDataInitialConditions(std::string_view const name,
                                                  double const* values,
                                                  int const integration_order)
 {
diff --git a/ProcessLib/HydroMechanics/HydroMechanicsFEM.h b/ProcessLib/HydroMechanics/HydroMechanicsFEM.h
index 1c2073039ea..f51448a48f9 100644
--- a/ProcessLib/HydroMechanics/HydroMechanicsFEM.h
+++ b/ProcessLib/HydroMechanics/HydroMechanicsFEM.h
@@ -196,7 +196,7 @@ class HydroMechanicsLocalAssembler
 
     /// Returns number of read integration points.
     std::size_t setIPDataInitialConditions(
-        std::string const& name,
+        std::string_view const name,
         double const* values,
         int const integration_order) override;
 
diff --git a/ProcessLib/HydroMechanics/LocalAssemblerInterface.h b/ProcessLib/HydroMechanics/LocalAssemblerInterface.h
index d564adb30b3..619b8739e98 100644
--- a/ProcessLib/HydroMechanics/LocalAssemblerInterface.h
+++ b/ProcessLib/HydroMechanics/LocalAssemblerInterface.h
@@ -23,7 +23,7 @@ struct LocalAssemblerInterface : public ProcessLib::LocalAssemblerInterface,
                                  public NumLib::ExtrapolatableElement
 {
     virtual std::size_t setIPDataInitialConditions(
-        std::string const& name, double const* values,
+        std::string_view const name, double const* values,
         int const integration_order) = 0;
 
     virtual std::vector<double> getSigma() const = 0;
diff --git a/ProcessLib/LargeDeformation/LocalAssemblerInterface.h b/ProcessLib/LargeDeformation/LocalAssemblerInterface.h
index a01d8bee9cb..44c38134098 100644
--- a/ProcessLib/LargeDeformation/LocalAssemblerInterface.h
+++ b/ProcessLib/LargeDeformation/LocalAssemblerInterface.h
@@ -61,7 +61,7 @@ struct LargeDeformationLocalAssemblerInterface
         output_data_.resize(n_integration_points);
     }
     /// Returns number of read integration points.
-    std::size_t setIPDataInitialConditions(std::string const& name,
+    std::size_t setIPDataInitialConditions(std::string_view name,
                                            double const* values,
                                            int const integration_order)
     {
@@ -77,17 +77,16 @@ struct LargeDeformationLocalAssemblerInterface
 
         if (name.starts_with("material_state_variable_"))
         {
-            std::string const variable_name = name.substr(24, name.size() - 24);
+            name.remove_prefix(24);
 
             auto const& internal_variables =
                 solid_material_.getInternalVariables();
             if (auto const iv = std::find_if(
                     begin(internal_variables), end(internal_variables),
-                    [&variable_name](auto const& iv)
-                    { return iv.name == variable_name; });
+                    [&name](auto const& iv) { return iv.name == name; });
                 iv != end(internal_variables))
             {
-                DBUG("Setting material state variable '{:s}'", variable_name);
+                DBUG("Setting material state variable '{:s}'", name);
                 return ProcessLib::
                     setIntegrationPointDataMaterialStateVariables(
                         values, material_states_,
@@ -99,7 +98,7 @@ struct LargeDeformationLocalAssemblerInterface
             WARN(
                 "Could not find variable {:s} in solid material model's "
                 "internal variables.",
-                variable_name);
+                name);
             return 0;
         }
 
diff --git a/ProcessLib/Reflection/ReflectionSetIPData.h b/ProcessLib/Reflection/ReflectionSetIPData.h
index 2ce68bd6647..5b3ee832635 100644
--- a/ProcessLib/Reflection/ReflectionSetIPData.h
+++ b/ProcessLib/Reflection/ReflectionSetIPData.h
@@ -72,7 +72,7 @@ void setIPData(double const* values,
 // Returns true if IP have been set, false otherwise.
 template <int dim, typename IPData, typename Accessor_CurrentLevelFromIPData,
           typename Class, typename Accessor>
-bool setIPDataIfNameMatches(std::string const& name, double const* values,
+bool setIPDataIfNameMatches(std::string_view const name, double const* values,
                             std::vector<IPData>& ip_data_vector,
                             Accessor_CurrentLevelFromIPData const& accessor,
                             ReflectionData<Class, Accessor> const& refl_data)
@@ -112,7 +112,7 @@ bool setIPDataIfNameMatches(std::string const& name, double const* values,
 template <int dim, typename IPData, typename Accessor_CurrentLevelFromIPData,
           typename... Classes, typename... Accessors, std::size_t... Idcs>
 bool reflectSetIPData(
-    std::string const& name, double const* values,
+    std::string_view const name, double const* values,
     std::vector<IPData>& ip_data_vector,
     Accessor_CurrentLevelFromIPData const& accessor,
     std::tuple<ReflectionData<Classes, Accessors>...> const& refl_data,
@@ -128,7 +128,7 @@ bool reflectSetIPData(
 template <int dim, typename IPData, typename Accessor_CurrentLevelFromIPData,
           typename... Classes, typename... Accessors>
 bool reflectSetIPData(
-    std::string const& name, double const* values,
+    std::string_view const name, double const* values,
     std::vector<IPData>& ip_data_vector,
     Accessor_CurrentLevelFromIPData const& accessor,
     std::tuple<ReflectionData<Classes, Accessors>...> const& refl_data)
@@ -149,7 +149,7 @@ bool reflectSetIPData(
  * \return The number of integration points.
  */
 template <int dim, typename IPData>
-std::size_t reflectSetIPData(std::string const& name, double const* values,
+std::size_t reflectSetIPData(std::string_view const name, double const* values,
                              std::vector<IPData>& ip_data_vector)
 {
     detail::reflectSetIPData<dim>(
diff --git a/ProcessLib/RichardsMechanics/LocalAssemblerInterface.h b/ProcessLib/RichardsMechanics/LocalAssemblerInterface.h
index b7071b7ca0d..15b57eaafcd 100644
--- a/ProcessLib/RichardsMechanics/LocalAssemblerInterface.h
+++ b/ProcessLib/RichardsMechanics/LocalAssemblerInterface.h
@@ -23,7 +23,7 @@ struct LocalAssemblerInterface : public ProcessLib::LocalAssemblerInterface,
                                  public NumLib::ExtrapolatableElement
 {
     virtual std::size_t setIPDataInitialConditions(
-        std::string const& name, double const* values,
+        std::string_view const name, double const* values,
         int const integration_order) = 0;
 
     virtual std::vector<double> getSigma() const = 0;
diff --git a/ProcessLib/RichardsMechanics/RichardsMechanicsFEM-impl.h b/ProcessLib/RichardsMechanics/RichardsMechanicsFEM-impl.h
index 2cd2acbc576..44570845cfe 100644
--- a/ProcessLib/RichardsMechanics/RichardsMechanicsFEM-impl.h
+++ b/ProcessLib/RichardsMechanics/RichardsMechanicsFEM-impl.h
@@ -195,7 +195,7 @@ template <typename ShapeFunctionDisplacement, typename ShapeFunctionPressure,
           int DisplacementDim>
 std::size_t RichardsMechanicsLocalAssembler<
     ShapeFunctionDisplacement, ShapeFunctionPressure,
-    DisplacementDim>::setIPDataInitialConditions(std::string const& name,
+    DisplacementDim>::setIPDataInitialConditions(std::string_view name,
                                                  double const* values,
                                                  int const integration_order)
 {
@@ -250,19 +250,18 @@ std::size_t RichardsMechanicsLocalAssembler<
     }
     if (name.starts_with("material_state_variable_"))
     {
-        std::string const variable_name = name.substr(24, name.size() - 24);
+        name.remove_prefix(24);
 
         // Using first ip data for solid material. TODO (naumov) move solid
         // material into element, store only material state in IPs.
         auto const& internal_variables =
             _ip_data[0].solid_material.getInternalVariables();
-        if (auto const iv =
-                std::find_if(begin(internal_variables), end(internal_variables),
-                             [&variable_name](auto const& iv)
-                             { return iv.name == variable_name; });
+        if (auto const iv = std::find_if(
+                begin(internal_variables), end(internal_variables),
+                [&name](auto const& iv) { return iv.name == name; });
             iv != end(internal_variables))
         {
-            DBUG("Setting material state variable '{:s}'", variable_name);
+            DBUG("Setting material state variable '{:s}'", name);
             return ProcessLib::setIntegrationPointDataMaterialStateVariables(
                 values, _ip_data, &IpData::material_state_variables,
                 iv->reference);
@@ -270,7 +269,7 @@ std::size_t RichardsMechanicsLocalAssembler<
 
         ERR("Could not find variable {:s} in solid material model's internal "
             "variables.",
-            variable_name);
+            name);
     }
     return 0;
 }
diff --git a/ProcessLib/RichardsMechanics/RichardsMechanicsFEM.h b/ProcessLib/RichardsMechanics/RichardsMechanicsFEM.h
index 72f22347367..20dd1a72505 100644
--- a/ProcessLib/RichardsMechanics/RichardsMechanicsFEM.h
+++ b/ProcessLib/RichardsMechanics/RichardsMechanicsFEM.h
@@ -90,7 +90,7 @@ class RichardsMechanicsLocalAssembler
 
     /// \return the number of read integration points.
     std::size_t setIPDataInitialConditions(
-        std::string const& name,
+        std::string_view const name,
         double const* values,
         int const integration_order) override;
 
diff --git a/ProcessLib/SmallDeformation/LocalAssemblerInterface.h b/ProcessLib/SmallDeformation/LocalAssemblerInterface.h
index 2889e61e1c4..47283639c14 100644
--- a/ProcessLib/SmallDeformation/LocalAssemblerInterface.h
+++ b/ProcessLib/SmallDeformation/LocalAssemblerInterface.h
@@ -64,7 +64,7 @@ struct SmallDeformationLocalAssemblerInterface
         output_data_.resize(n_integration_points);
     }
     /// Returns number of read integration points.
-    std::size_t setIPDataInitialConditions(std::string const& name,
+    std::size_t setIPDataInitialConditions(std::string_view name,
                                            double const* values,
                                            int const integration_order)
     {
@@ -80,17 +80,16 @@ struct SmallDeformationLocalAssemblerInterface
 
         if (name.starts_with("material_state_variable_"))
         {
-            std::string const variable_name = name.substr(24, name.size() - 24);
+            name.remove_prefix(24);
 
             auto const& internal_variables =
                 solid_material_.getInternalVariables();
             if (auto const iv = std::find_if(
                     begin(internal_variables), end(internal_variables),
-                    [&variable_name](auto const& iv)
-                    { return iv.name == variable_name; });
+                    [&name](auto const& iv) { return iv.name == name; });
                 iv != end(internal_variables))
             {
-                DBUG("Setting material state variable '{:s}'", variable_name);
+                DBUG("Setting material state variable '{:s}'", name);
                 return ProcessLib::
                     setIntegrationPointDataMaterialStateVariables(
                         values, material_states_,
@@ -102,7 +101,7 @@ struct SmallDeformationLocalAssemblerInterface
             WARN(
                 "Could not find variable {:s} in solid material model's "
                 "internal variables.",
-                variable_name);
+                name);
             return 0;
         }
 
diff --git a/ProcessLib/SmallDeformationNonlocal/LocalAssemblerInterface.h b/ProcessLib/SmallDeformationNonlocal/LocalAssemblerInterface.h
index bb5c9b59d52..fc83d2146ce 100644
--- a/ProcessLib/SmallDeformationNonlocal/LocalAssemblerInterface.h
+++ b/ProcessLib/SmallDeformationNonlocal/LocalAssemblerInterface.h
@@ -27,7 +27,7 @@ struct SmallDeformationNonlocalLocalAssemblerInterface
       public NumLib::ExtrapolatableElement
 {
     virtual std::size_t setIPDataInitialConditions(
-        std::string const& name, double const* values,
+        std::string_view const name, double const* values,
         int const integration_order) = 0;
 
     virtual void setIPDataInitialConditionsFromCellData(
diff --git a/ProcessLib/SmallDeformationNonlocal/SmallDeformationNonlocalFEM.h b/ProcessLib/SmallDeformationNonlocal/SmallDeformationNonlocalFEM.h
index 3985af716c8..0aaac192d69 100644
--- a/ProcessLib/SmallDeformationNonlocal/SmallDeformationNonlocalFEM.h
+++ b/ProcessLib/SmallDeformationNonlocal/SmallDeformationNonlocalFEM.h
@@ -146,7 +146,7 @@ class SmallDeformationNonlocalLocalAssembler
         }
     }
 
-    std::size_t setIPDataInitialConditions(std::string const& name,
+    std::size_t setIPDataInitialConditions(std::string_view const name,
                                            double const* values,
                                            int const integration_order) override
     {
diff --git a/ProcessLib/TH2M/LocalAssemblerInterface.h b/ProcessLib/TH2M/LocalAssemblerInterface.h
index f05ad6995ac..dd1a8759dfc 100644
--- a/ProcessLib/TH2M/LocalAssemblerInterface.h
+++ b/ProcessLib/TH2M/LocalAssemblerInterface.h
@@ -23,7 +23,7 @@ struct LocalAssemblerInterface : public ProcessLib::LocalAssemblerInterface,
                                  public NumLib::ExtrapolatableElement
 {
     virtual std::size_t setIPDataInitialConditions(
-        std::string const& name, double const* values,
+        std::string_view name, double const* values,
         int const integration_order) = 0;
 
     virtual std::vector<double> getSigma() const = 0;
diff --git a/ProcessLib/TH2M/TH2MFEM-impl.h b/ProcessLib/TH2M/TH2MFEM-impl.h
index 29b09ffa57a..f470f0769f6 100644
--- a/ProcessLib/TH2M/TH2MFEM-impl.h
+++ b/ProcessLib/TH2M/TH2MFEM-impl.h
@@ -852,7 +852,7 @@ template <typename ShapeFunctionDisplacement, typename ShapeFunctionPressure,
           int DisplacementDim>
 std::size_t TH2MLocalAssembler<
     ShapeFunctionDisplacement, ShapeFunctionPressure,
-    DisplacementDim>::setIPDataInitialConditions(std::string const& name,
+    DisplacementDim>::setIPDataInitialConditions(std::string_view name,
                                                  double const* values,
                                                  int const integration_order)
 {
@@ -897,19 +897,19 @@ std::size_t TH2MLocalAssembler<
     }
     if (name.starts_with("material_state_variable_"))
     {
-        std::string const variable_name = name.substr(24, name.size() - 24);
+        name.remove_prefix(24);
+        DBUG("Setting material state variable '{:s}'", name);
 
         // Using first ip data for solid material. TODO (naumov) move solid
         // material into element, store only material state in IPs.
         auto const& internal_variables =
             _ip_data[0].solid_material.getInternalVariables();
-        if (auto const iv =
-                std::find_if(begin(internal_variables), end(internal_variables),
-                             [&variable_name](auto const& iv)
-                             { return iv.name == variable_name; });
+        if (auto const iv = std::find_if(
+                begin(internal_variables), end(internal_variables),
+                [&name](auto const& iv) { return iv.name == name; });
             iv != end(internal_variables))
         {
-            DBUG("Setting material state variable '{:s}'", variable_name);
+            DBUG("Setting material state variable '{:s}'", name);
             return ProcessLib::setIntegrationPointDataMaterialStateVariables(
                 values, _ip_data, &IpData::material_state_variables,
                 iv->reference);
@@ -918,7 +918,7 @@ std::size_t TH2MLocalAssembler<
         WARN(
             "Could not find variable {:s} in solid material model's "
             "internal variables.",
-            variable_name);
+            name);
     }
     return 0;
 }
diff --git a/ProcessLib/TH2M/TH2MFEM.h b/ProcessLib/TH2M/TH2MFEM.h
index 5d788b93063..1741af2100c 100644
--- a/ProcessLib/TH2M/TH2MFEM.h
+++ b/ProcessLib/TH2M/TH2MFEM.h
@@ -93,7 +93,7 @@ class TH2MLocalAssembler : public LocalAssemblerInterface<DisplacementDim>
 private:
     /// \return the number of read integration points.
     std::size_t setIPDataInitialConditions(
-        std::string const& name,
+        std::string_view const name,
         double const* values,
         int const integration_order) override;
 
diff --git a/ProcessLib/ThermoHydroMechanics/LocalAssemblerInterface.h b/ProcessLib/ThermoHydroMechanics/LocalAssemblerInterface.h
index 9828b2dde0c..f2c2e72af4c 100644
--- a/ProcessLib/ThermoHydroMechanics/LocalAssemblerInterface.h
+++ b/ProcessLib/ThermoHydroMechanics/LocalAssemblerInterface.h
@@ -21,7 +21,7 @@ struct LocalAssemblerInterface : public ProcessLib::LocalAssemblerInterface,
                                  public NumLib::ExtrapolatableElement
 {
     virtual std::size_t setIPDataInitialConditions(
-        std::string const& name, double const* values,
+        std::string_view const name, double const* values,
         int const integration_order) = 0;
 
     virtual std::vector<double> getSigma() const = 0;
diff --git a/ProcessLib/ThermoHydroMechanics/ThermoHydroMechanicsFEM-impl.h b/ProcessLib/ThermoHydroMechanics/ThermoHydroMechanicsFEM-impl.h
index 9d91ed0ca9e..95b4219a304 100644
--- a/ProcessLib/ThermoHydroMechanics/ThermoHydroMechanicsFEM-impl.h
+++ b/ProcessLib/ThermoHydroMechanics/ThermoHydroMechanicsFEM-impl.h
@@ -106,7 +106,7 @@ template <typename ShapeFunctionDisplacement, typename ShapeFunctionPressure,
           int DisplacementDim>
 std::size_t ThermoHydroMechanicsLocalAssembler<
     ShapeFunctionDisplacement, ShapeFunctionPressure,
-    DisplacementDim>::setIPDataInitialConditions(std::string const& name,
+    DisplacementDim>::setIPDataInitialConditions(std::string_view const name,
                                                  double const* values,
                                                  int const integration_order)
 {
diff --git a/ProcessLib/ThermoHydroMechanics/ThermoHydroMechanicsFEM.h b/ProcessLib/ThermoHydroMechanics/ThermoHydroMechanicsFEM.h
index 8a2404f3538..8a8e4935f7c 100644
--- a/ProcessLib/ThermoHydroMechanics/ThermoHydroMechanicsFEM.h
+++ b/ProcessLib/ThermoHydroMechanics/ThermoHydroMechanicsFEM.h
@@ -89,7 +89,7 @@ class ThermoHydroMechanicsLocalAssembler : public LocalAssemblerInterface
 
     /// Returns number of read integration points.
     std::size_t setIPDataInitialConditions(
-        std::string const& name,
+        std::string_view const name,
         double const* values,
         int const integration_order) override;
 
diff --git a/ProcessLib/ThermoMechanics/LocalAssemblerInterface.h b/ProcessLib/ThermoMechanics/LocalAssemblerInterface.h
index 2bc3f337206..44b6ef21fb8 100644
--- a/ProcessLib/ThermoMechanics/LocalAssemblerInterface.h
+++ b/ProcessLib/ThermoMechanics/LocalAssemblerInterface.h
@@ -26,7 +26,7 @@ struct ThermoMechanicsLocalAssemblerInterface
       public NumLib::ExtrapolatableElement
 {
     virtual std::size_t setIPDataInitialConditions(
-        std::string const& name, double const* values,
+        std::string_view const name, double const* values,
         int const integration_order) = 0;
 
     virtual std::vector<double> getSigma() const = 0;
diff --git a/ProcessLib/ThermoMechanics/ThermoMechanicsFEM-impl.h b/ProcessLib/ThermoMechanics/ThermoMechanicsFEM-impl.h
index 61187376a9a..f9e4f067363 100644
--- a/ProcessLib/ThermoMechanics/ThermoMechanicsFEM-impl.h
+++ b/ProcessLib/ThermoMechanics/ThermoMechanicsFEM-impl.h
@@ -81,7 +81,7 @@ ThermoMechanicsLocalAssembler<ShapeFunction, DisplacementDim>::
 
 template <typename ShapeFunction, int DisplacementDim>
 std::size_t ThermoMechanicsLocalAssembler<ShapeFunction, DisplacementDim>::
-    setIPDataInitialConditions(std::string const& name,
+    setIPDataInitialConditions(std::string_view const name,
                                double const* values,
                                int const integration_order)
 {
diff --git a/ProcessLib/ThermoMechanics/ThermoMechanicsFEM.h b/ProcessLib/ThermoMechanics/ThermoMechanicsFEM.h
index 6b9fe3d72de..73f7bd1af86 100644
--- a/ProcessLib/ThermoMechanics/ThermoMechanicsFEM.h
+++ b/ProcessLib/ThermoMechanics/ThermoMechanicsFEM.h
@@ -163,7 +163,7 @@ class ThermoMechanicsLocalAssembler
 
     /// Returns number of read integration points.
     std::size_t setIPDataInitialConditions(
-        std::string const& name,
+        std::string_view const name,
         double const* values,
         int const integration_order) override;
 
diff --git a/ProcessLib/ThermoRichardsFlow/LocalAssemblerInterface.h b/ProcessLib/ThermoRichardsFlow/LocalAssemblerInterface.h
index f48c4591f08..ead9919112a 100644
--- a/ProcessLib/ThermoRichardsFlow/LocalAssemblerInterface.h
+++ b/ProcessLib/ThermoRichardsFlow/LocalAssemblerInterface.h
@@ -22,7 +22,7 @@ struct LocalAssemblerInterface : public ProcessLib::LocalAssemblerInterface,
                                  public NumLib::ExtrapolatableElement
 {
     virtual std::size_t setIPDataInitialConditions(
-        std::string const& name, double const* values,
+        std::string_view const name, double const* values,
         int const integration_order) = 0;
 
     virtual std::vector<double> const& getIntPtDarcyVelocity(
diff --git a/ProcessLib/ThermoRichardsFlow/ThermoRichardsFlowFEM-impl.h b/ProcessLib/ThermoRichardsFlow/ThermoRichardsFlowFEM-impl.h
index a7b71707fe0..337c827d16a 100644
--- a/ProcessLib/ThermoRichardsFlow/ThermoRichardsFlowFEM-impl.h
+++ b/ProcessLib/ThermoRichardsFlow/ThermoRichardsFlowFEM-impl.h
@@ -80,7 +80,7 @@ ThermoRichardsFlowLocalAssembler<ShapeFunction, GlobalDim>::
 
 template <typename ShapeFunction, int GlobalDim>
 std::size_t ThermoRichardsFlowLocalAssembler<ShapeFunction, GlobalDim>::
-    setIPDataInitialConditions(std::string const& name,
+    setIPDataInitialConditions(std::string_view const name,
                                double const* values,
                                int const integration_order)
 {
diff --git a/ProcessLib/ThermoRichardsFlow/ThermoRichardsFlowFEM.h b/ProcessLib/ThermoRichardsFlow/ThermoRichardsFlowFEM.h
index b6b30386618..eda5e27a4a9 100644
--- a/ProcessLib/ThermoRichardsFlow/ThermoRichardsFlowFEM.h
+++ b/ProcessLib/ThermoRichardsFlow/ThermoRichardsFlowFEM.h
@@ -59,7 +59,7 @@ class ThermoRichardsFlowLocalAssembler : public LocalAssemblerInterface
 
     /// \return the number of read integration points.
     std::size_t setIPDataInitialConditions(
-        std::string const& name,
+        std::string_view const name,
         double const* values,
         int const integration_order) override;
 
diff --git a/ProcessLib/ThermoRichardsMechanics/LocalAssemblerInterface.h b/ProcessLib/ThermoRichardsMechanics/LocalAssemblerInterface.h
index eefa35b0911..c4ab79d2235 100644
--- a/ProcessLib/ThermoRichardsMechanics/LocalAssemblerInterface.h
+++ b/ProcessLib/ThermoRichardsMechanics/LocalAssemblerInterface.h
@@ -54,7 +54,7 @@ struct LocalAssemblerInterface : public ProcessLib::LocalAssemblerInterface,
         }
     }
 
-    std::size_t setIPDataInitialConditions(std::string const& name,
+    std::size_t setIPDataInitialConditions(std::string_view name,
                                            double const* values,
                                            int const integration_order)
     {
@@ -83,17 +83,16 @@ struct LocalAssemblerInterface : public ProcessLib::LocalAssemblerInterface,
         // reflectWithName function also supports only a single return value.
         if (name.starts_with("material_state_variable_"))
         {
-            std::string const variable_name = name.substr(24, name.size() - 24);
+            name.remove_prefix(24);
 
             auto const& internal_variables =
                 solid_material_.getInternalVariables();
             if (auto const iv = std::find_if(
                     begin(internal_variables), end(internal_variables),
-                    [&variable_name](auto const& iv)
-                    { return iv.name == variable_name; });
+                    [&name](auto const& iv) { return iv.name == name; });
                 iv != end(internal_variables))
             {
-                DBUG("Setting material state variable '{:s}'", variable_name);
+                DBUG("Setting material state variable '{:s}'", name);
                 return ProcessLib::
                     setIntegrationPointDataMaterialStateVariables(
                         values, material_states_,
diff --git a/ProcessLib/Utils/SetIPDataInitialConditions.h b/ProcessLib/Utils/SetIPDataInitialConditions.h
index 766d3a5a40b..0c813f65380 100644
--- a/ProcessLib/Utils/SetIPDataInitialConditions.h
+++ b/ProcessLib/Utils/SetIPDataInitialConditions.h
@@ -10,6 +10,8 @@
 
 #pragma once
 
+#include <string_view>
+
 #include "BaseLib/Error.h"
 #include "MeshLib/Properties.h"
 #include "MeshLib/Utils/IntegrationPointWriter.h"
@@ -17,7 +19,7 @@
 namespace ProcessLib
 {
 /// Removes the suffix '_ip' from the passed field name.
-inline std::string removeIPFieldDataNameSuffix(std::string const& name)
+inline std::string_view removeIPFieldDataNameSuffix(std::string_view const name)
 {
     if (!name.ends_with("_ip"))
     {
@@ -27,7 +29,7 @@ inline std::string removeIPFieldDataNameSuffix(std::string const& name)
             name);
     }
 
-    return name.substr(0, name.size() - 3);
+    return {name.data(), name.size() - 3};
 }
 
 template <typename LocalAssemblersVector>
@@ -71,7 +73,7 @@ void setIPDataInitialConditions(
 
         INFO("Setting initial integration point data for '{}'", name);
 
-        auto const& name_transformed = removeIPFieldDataNameSuffix(name);
+        auto const name_transformed = removeIPFieldDataNameSuffix(name);
 
         // Now we have a properly named vtk's field data array and the
         // corresponding meta data.