Add noop getMetricsV1 to HashTable.cpp

It's not all that interesting in the end

Bench.cpp

@@ -358,21 +358,6 @@ void benchWorstCaseForRadixRangeRead() {
   // }
 }
 
-void benchMetrics() {
-  ankerl::nanobench::Bench bench;
-  ConflictSet cs{0};
-
-  int count;
-  ConflictSet::MetricsV1 *m;
-  cs.getMetricsV1(&m, &count);
-  bench.batch(count);
-  bench.run("fetch metric", [&]() {
-    for (int i = 0; i < count; ++i) {
-      m[i].getValue();
-    }
-  });
-}
-
 void benchCreateAndDestroy() {
   ankerl::nanobench::Bench bench;
 
@@ -382,6 +367,5 @@ void benchCreateAndDestroy() {
 int main(void) {
   benchConflictSet();
   benchWorstCaseForRadixRangeRead();
-  benchMetrics();
   benchCreateAndDestroy();
 }

ConflictSet.cpp

@@ -1111,7 +1111,8 @@ Node *&getOrCreateChild(Node *&self, uint8_t index, WriteContext *tls) {
       memmove(self16->index + i + 1, self16->index + i,
               self->numChildren - (i + 1));
       memmove(self16->children + i + 1, self16->children + i,
-              (self->numChildren - (i + 1)) * sizeof(self16->children[0]));
+              (self->numChildren - (i + 1)) *
+                  sizeof(self16->children[0])); // NOLINT
       memmove(self16->childMaxVersion + i + 1, self16->childMaxVersion + i,
               (self->numChildren - (i + 1)) *
                   sizeof(self16->childMaxVersion[0]));

HashTable.cpp

@@ -98,6 +98,13 @@ void ConflictSet::setOldestVersion(int64_t oldestVersion) {
 
 int64_t ConflictSet::getBytes() const { return -1; }
 
+void ConflictSet::getMetricsV1(MetricsV1 **metrics, int *count) const {
+  *metrics = nullptr;
+  *count = 0;
+}
+
+double ConflictSet::MetricsV1::getValue() const { return 0; }
+
 ConflictSet::ConflictSet(int64_t oldestVersion)
     : impl(new(safe_malloc(sizeof(Impl))) Impl{oldestVersion}) {}