1 files changed, 9 insertions, 2 deletions
diff --git a/src/mongo/db/exec/document_value/document.cpp b/src/mongo/db/exec/document_value/document.cpp
index 7172370e4c3..2bcb637d17b 100644
--- a/src/mongo/db/exec/document_value/document.cpp
+++ b/src/mongo/db/exec/document_value/document.cpp
@@ -255,7 +255,8 @@ Value& DocumentStorage::appendField(T field, ValueElement::Kind kind) {
     append(nextCollision);
     append(nameSize);
     append(kind);
-    field.copyTo(dest, true);
+    dest += field.copy(dest, field.size());
+    *dest++ = '\0';  // Like std::string, there is both an explicit size and final NUL byte.
 // Padding for alignment handled above
 #undef append
 
@@ -432,6 +433,12 @@ Document DocumentStorage::shred() const {
     return md.freeze();
 }
 
+void DocumentStorage::loadIntoCache() const {
+    for (DocumentStorageIterator it = iterator(); !it.atEnd(); it.advance()) {
+        it.get();
+    }
+}
+
 void DocumentStorage::loadLazyMetadata() const {
     if (_haveLazyLoadedMetadata) {
         return;
@@ -819,7 +826,7 @@ void Document::serializeForSorter(BufBuilder& buf) const {
     buf.appendNum(static_cast<int>(numElems));
 
     for (DocumentStorageIterator it = storage().iterator(); !it.atEnd(); it.advance()) {
-        buf.appendStr(it->nameSD(), /*NUL byte*/ true);
+        buf.appendCStr(it->nameSD());
         it->val.serializeForSorter(buf);
     }