up

.github/workflows/build.yml

@@ -50,7 +50,7 @@ jobs:
             packages: googletest libgmock-dev libgtest-dev
             version: 1.0
 
-        - uses: actions/checkout@v5
+        - uses: actions/checkout@v4
 
         - name: Configure
           run: |
@@ -108,7 +108,7 @@ jobs:
           os: [ubuntu-latest, windows-latest, macos-latest]
       runs-on: ${{ matrix.os }}
       steps:
-        - uses: actions/checkout@v5
+        - uses: actions/checkout@v4
 
         - name: Build
           run: |
@@ -126,7 +126,7 @@ jobs:
           os: [ubuntu-latest, windows-latest, macos-latest]
       runs-on: ${{ matrix.os }}
       steps:
-        - uses: actions/checkout@v5
+        - uses: actions/checkout@v4
 
         - name: Build
           shell: bash

.github/workflows/bzlmod-archive.yml

@@ -12,7 +12,7 @@ jobs:
     permissions:
       contents: write
     steps:
-      - uses: actions/checkout@ff7abcd0c3c05ccf6adc123a8cd1fd4fb30fb493 # v4.1.1
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
       - run: git archive $GITHUB_REF -o "yaml-cpp-${GITHUB_REF:10}.tar.gz"
       - run: gh release upload ${GITHUB_REF:10} "yaml-cpp-${GITHUB_REF:10}.tar.gz"
         env:

include/yaml-cpp/node/detail/memory.h

@@ -25,6 +25,7 @@ class YAML_CPP_API memory {
   memory() : m_nodes{} {}
   node& create_node();
   void merge(const memory& rhs);
+  size_t size() const;
 
  private:
   using Nodes = std::set<shared_node>;

src/memory.cpp

@@ -9,6 +9,10 @@ void memory_holder::merge(memory_holder& rhs) {
   if (m_pMemory == rhs.m_pMemory)
     return;
 
+  if (m_pMemory->size() < rhs.m_pMemory->size()) {
+    std::swap(m_pMemory, rhs.m_pMemory);
+  }
+
   m_pMemory->merge(*rhs.m_pMemory);
   rhs.m_pMemory = m_pMemory;
 }
@@ -22,5 +26,9 @@ node& memory::create_node() {
 void memory::merge(const memory& rhs) {
   m_nodes.insert(rhs.m_nodes.begin(), rhs.m_nodes.end());
 }
+
+size_t memory::size() const {
+    return m_nodes.size();
+}
 }  // namespace detail
 }  // namespace YAML