From 24f61169a66920971981963c964e71e17c49ee13 Mon Sep 17 00:00:00 2001
From: Slavomir Kaslev <slavomir.kaslev@gmail.com>
Date: Fri, 16 Jan 2026 13:45:51 +0200
Subject: [PATCH] Avoid zmalloc_size() in kvobjAllocSize() and approximate
 instead

---
 src/object.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/object.c b/src/object.c
index 1241dff8b..aa667d17b 100644
--- a/src/object.c
+++ b/src/object.c
@@ -1236,8 +1236,16 @@ size_t kvobjComputeSize(robj *key, kvobj *o, size_t sample_size, int dbid) {
 }
 
 size_t kvobjAllocSize(kvobj *o) {
-    /* All kv-objects has at least kvobj header and embedded key */
-    size_t asize = zmalloc_size(kvobjGetAllocPtr(o));
+    debugServerAssert(o->iskvobj);
+    size_t asize = sizeof(kvobj);
+    /* Add metadata size */
+    asize += getNumMeta(o->metabits) * sizeof(uint64_t);
+    /* Add embedded key size */
+    asize += 1; /* embedded key header size */
+    asize += sdsAllocSize(kvobjGetKey(o));
+    /* Add embedded string size */
+    if (o->encoding == OBJ_ENCODING_EMBSTR)
+        asize += sdsAllocSize(o->ptr);
 
     if (o->type == OBJ_STRING) {
         asize += stringObjectAllocSize(o);