diff --git a/applications/test/DirLister/DirListerTemplates.C b/applications/test/DirLister/DirListerTemplates.C
index 7de1216c63..2b7cf16905 100644
--- a/applications/test/DirLister/DirListerTemplates.C
+++ b/applications/test/DirLister/DirListerTemplates.C
@@ -76,10 +76,10 @@ Foam::List<StringType> Foam::DirLister::csorted
     const bool prune
 ) const
 {
-    List<StringType> list(list<StringType>(pred, prune));
-    Foam::sort(list, stringOps::natural_sort());
+    List<StringType> result(list<StringType>(pred, prune));
+    Foam::sort(result, stringOps::natural_sort());
 
-    return list;
+    return result;
 }
 
 
diff --git a/applications/test/DynamicList/Test-DynamicList.C b/applications/test/DynamicList/Test-DynamicList.C
index ce6fb4b210..659bce8a98 100644
--- a/applications/test/DynamicList/Test-DynamicList.C
+++ b/applications/test/DynamicList/Test-DynamicList.C
@@ -248,7 +248,7 @@ int main(int argc, char *argv[])
         addr.emplace_back(2);
 
         // Can also use the return value
-        Info<< "adding " << addr.emplace_back(4) << endl;
+        Info<< "adding " << addr.emplace_back(4) << nl;
 
         forAll(dlE2, i)
         {
@@ -325,7 +325,7 @@ int main(int argc, char *argv[])
 
         input1 = list2;
 
-        Info<< nl << "test subset/remove with "
+        Info<< nl << "test remove with "
             << flatOutput(input1) << endl;
 
         for
@@ -344,11 +344,9 @@ int main(int argc, char *argv[])
             list2 = input1;
 
             list1.remove(range);
-            list2.subset(range);
 
             Info<< "input = " << flatOutput(input1) << nl
-                << "remove " << range << " = " << flatOutput(list1) << nl
-                << "subset " << range << " = " << flatOutput(list2) << nl;
+                << "remove " << range << " = " << flatOutput(list1) << nl;
         }
     }
 
diff --git a/applications/test/FixedList/Test-FixedList.C b/applications/test/FixedList/Test-FixedList.C
index e7f4c4e7a8..ae4bbc995c 100644
--- a/applications/test/FixedList/Test-FixedList.C
+++ b/applications/test/FixedList/Test-FixedList.C
@@ -211,22 +211,6 @@ int main(int argc, char *argv[])
             << " hash:" << Hash<FixedList<label, 4>>()(list2) << nl;
 
 
-        // Test deprecated form
-        SLList<label> sllist3;
-        {
-            sllist3.push_back(0);
-            sllist3.push_back(1);
-            sllist3.push_back(2);
-            sllist3.push_back(3);
-        }
-        FixedList<label, 4> list3(sllist3);
-
-        Info<< "list3:" << list3 << nl;
-        // Test deprecated forms
-        list3 = array2;
-        list2 = sllist3;
-
-
         // Using FixedList for content too
         {
             List<FixedList<label, 4>> twolists{list1, list2};
diff --git a/applications/test/HashTable1/Test-HashTable1.C b/applications/test/HashTable1/Test-HashTable1.C
index 811e93fd65..571f98f15a 100644
--- a/applications/test/HashTable1/Test-HashTable1.C
+++ b/applications/test/HashTable1/Test-HashTable1.C
@@ -121,7 +121,7 @@ int main()
     {
         OStringStream os;
         os  << table1;
-        HashTable<scalar> readTable(IStringStream(os.str())(), 100);
+        HashTable<scalar> readTable(IStringStream(os.str())());
 
         Info<< "Istream constructor:" << readTable << endl;
     }
diff --git a/applications/test/ICharStream1/Test-ICharStream1.C b/applications/test/ICharStream1/Test-ICharStream1.C
index f4b18a1f43..ec2bc3da07 100644
--- a/applications/test/ICharStream1/Test-ICharStream1.C
+++ b/applications/test/ICharStream1/Test-ICharStream1.C
@@ -194,12 +194,12 @@ int main(int argc, char *argv[])
     printInfo(newvalues);
 
     {
-        iliststream is(std::move(newvalues));
+        icharstream is(std::move(newvalues));
 
         char c = 0;
 
         Info<< nl
-            << "getting values from iliststream of "
+            << "getting values from icharstream of "
             << is.list() << endl;
 
         // Info<< " (" << is.tellg() << " " << is.remaining() << ")";
diff --git a/applications/test/fileHandler-writing/Make/files b/applications/test/fileHandler-writing/Make/files
new file mode 100644
index 0000000000..f85b2cccec
--- /dev/null
+++ b/applications/test/fileHandler-writing/Make/files
@@ -0,0 +1,3 @@
+Test-fileHandler-writing.C
+
+EXE = $(FOAM_USER_APPBIN)/Test-fileHandler-writing
diff --git a/applications/test/fileHandler-writing/Make/options b/applications/test/fileHandler-writing/Make/options
new file mode 100644
index 0000000000..67583ec122
--- /dev/null
+++ b/applications/test/fileHandler-writing/Make/options
@@ -0,0 +1,18 @@
+EXE_INC = \
+    -I$(LIB_SRC)/finiteVolume/lnInclude \
+    -I$(LIB_SRC)/meshTools/lnInclude \
+    -I$(LIB_SRC)/sampling/lnInclude \
+    -I$(LIB_SRC)/TurbulenceModels/turbulenceModels/lnInclude \
+    -I$(LIB_SRC)/TurbulenceModels/incompressible/lnInclude \
+    -I$(LIB_SRC)/transportModels \
+    -I$(LIB_SRC)/transportModels/incompressible/singlePhaseTransportModel
+
+EXE_LIBS = \
+    -lfiniteVolume \
+    -lfvOptions \
+    -lmeshTools \
+    -lsampling \
+    -lturbulenceModels \
+    -lincompressibleTurbulenceModels \
+    -lincompressibleTransportModels \
+    -latmosphericModels
diff --git a/applications/test/fileHandler-writing/Test-fileHandler-writing.C b/applications/test/fileHandler-writing/Test-fileHandler-writing.C
new file mode 100644
index 0000000000..03caeab26d
--- /dev/null
+++ b/applications/test/fileHandler-writing/Test-fileHandler-writing.C
@@ -0,0 +1,169 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2023 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM 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 General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+Application
+    Test-fileHandler-writing
+
+Description
+    Simple test of file writing, including timings
+
+\*---------------------------------------------------------------------------*/
+
+#include "argList.H"
+#include "profiling.H"
+#include "clockTime.H"
+
+#include "fileName.H"
+#include "fileOperation.H"
+#include "IOstreams.H"
+#include "OSspecific.H"
+#include "ReadFields.H"
+#include "volFields.H"
+
+using namespace Foam;
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+// Main program:
+
+int main(int argc, char *argv[])
+{
+    argList::addNote
+    (
+        "Loads mesh and fields from latest time and writes multiple times"
+    );
+
+    argList::noFunctionObjects();  // Disallow function objects
+    argList::addVerboseOption("additional verbosity");
+    argList::addOption("output", "Begin output iteration (default: 10000)");
+    argList::addOption("count", "Number of writes (default: 1)");
+
+    #include "setRootCase.H"
+    #include "createTime.H"
+
+    const label firstOutput = args.getOrDefault("output", 10000);
+    const label nOutput = args.getOrDefault("count", 1);
+
+    const int verbose = args.verbose();
+
+    // Select latestTime, including 0 and constant
+    {
+        const auto& times = runTime.times();
+        const label timeIndex = (times.size()-1);
+
+        if (timeIndex < 0)
+        {
+            FatalErrorInFunction
+                << "No times!"
+                << exit(FatalError);
+        }
+
+        runTime.setTime(times[timeIndex], timeIndex);
+    }
+
+    // #include "createMesh.H"
+
+    Info << "Create mesh time = " << runTime.timeName() << nl;
+
+    fvMesh mesh
+    (
+        IOobject
+        (
+            polyMesh::defaultRegion,
+            runTime.timeName(),
+            runTime,
+            Foam::IOobject::MUST_READ
+        ),
+        false
+    );
+    mesh.init(true);   // initialise all (lower levels and current)
+    Info<< endl;
+
+
+    // Read objects in time directory
+    IOobjectList objects(mesh, runTime.timeName());
+
+    // List of stored objects to clear after (as required)
+    DynamicList<regIOobject*> storedObjects;
+
+
+    // Read GeometricFields
+    Info<< nl << "Load fields" << nl;
+
+    #undef  ReadFields
+    #define ReadFields(FieldType)                                             \
+    readFields<FieldType>(mesh, objects, predicates::always{}, storedObjects);
+
+    // Read volFields
+    ReadFields(volScalarField);
+    ReadFields(volVectorField);
+    ReadFields(volSphericalTensorField);
+    ReadFields(volSymmTensorField);
+    ReadFields(volTensorField);
+
+    // Set fields to AUTO_WRITE
+    for (regIOobject* io : storedObjects)
+    {
+        io->writeOpt(IOobjectOption::AUTO_WRITE);
+    }
+
+    Info<< nl
+        << "Writing " << nOutput << " times starting at "
+        << firstOutput << nl;
+
+    clockTime timing;
+
+    if (verbose) Info<< "Time:";
+
+    for
+    (
+        label timeIndex = firstOutput, count = 0;
+        count < nOutput;
+        ++timeIndex, ++count
+    )
+    {
+        runTime.setTime(timeIndex, timeIndex);
+        if (verbose) Info<< ' ' << runTime.timeName() << flush;
+        runTime.writeNow();
+    }
+
+    if (verbose) Info<< nl;
+    Info<< nl << "Writing took "
+        << timing.timeIncrement() << "s" << endl;
+
+
+    Info<< nl
+        << "Cleanup newly generated files with" << nl << nl
+        << "    foamListTimes -rm -time "
+        << firstOutput << ":" << nl
+        << "    foamListTimes -processor -rm -time "
+        << firstOutput << ":" << nl;
+
+
+    Info<< "\nEnd\n" << endl;
+    return 0;
+}
+
+
+// ************************************************************************* //
diff --git a/applications/test/polyMeshGeom-speed1/Test-polyMeshGeom-speed1.C b/applications/test/polyMeshGeom-speed1/Test-polyMeshGeom-speed1.C
index 4c268797dd..202b1a76d6 100644
--- a/applications/test/polyMeshGeom-speed1/Test-polyMeshGeom-speed1.C
+++ b/applications/test/polyMeshGeom-speed1/Test-polyMeshGeom-speed1.C
@@ -117,8 +117,7 @@ void cell_labels
         nVerts += meshFaces[facei].size();
     }
 
-    // pointLabels.clear();
-    pointLabels.expandStorage();
+    pointLabels.resize(pointLabels.capacity());  // Use full storage
 
     // The first face has no duplicates, can copy in values
     const labelList& firstFace = meshFaces[cFaces[0]];