Add interned string stats in debug command

1 files changed, 20 insertions, 0 deletions

diff --git a/src/interned_string.cc b/src/interned_string.cc
index 3646e2f8..fb6898c0 100644
--- a/src/interned_string.cc
+++ b/src/interned_string.cc
@@ -1,8 +1,28 @@
 #include "interned_string.hh"
+#include "debug.hh"
 
 namespace Kakoune
 {
 
+void StringRegistry::debug_stats() const
+{
+    write_debug("Interned Strings stats:");
+    write_debug("  slots: " + to_string(m_storage.size()) + " allocated, " + to_string(m_free_slots.size()) + " free");
+    size_t total_refcount = 0;
+    size_t total_size = 0;
+    size_t count = 0;
+    for (auto& st : m_storage)
+    {
+        if (st.refcount == 0)
+            continue;
+        total_refcount += st.refcount;
+        total_size += st.data.size();
+        ++count;
+    }
+    write_debug("  data size: " + to_string(total_size) + ", mean: " + to_string((float)total_size/count));
+    write_debug("  refcounts: " + to_string(total_refcount) + ", mean: " + to_string((float)total_refcount/count));
+}
+
 InternedString StringRegistry::acquire(StringView str)
 {
     auto it = m_slot_map.find(str);