mrhhsg commented on code in PR #63389:
URL: https://github.com/apache/doris/pull/63389#discussion_r3456564296


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be/src/storage/index/zone_map/zonemap_eval_context.cpp:
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@@ -0,0 +1,71 @@
+// Licensed to the Apache Software Foundation (ASF) under one
+// or more contributor license agreements.  See the NOTICE file
+// distributed with this work for additional information
+// regarding copyright ownership.  The ASF licenses this file
+// to you under the Apache License, Version 2.0 (the
+// "License"); you may not use this file except in compliance
+// with the License.  You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+#include "storage/index/zone_map/zonemap_eval_context.h"
+
+#include <algorithm>
+#include <string>
+
+#include "runtime/runtime_profile.h"
+
+namespace doris {
+
+const segment_v2::ZoneMap* ZoneMapEvalContext::zone_map(int slot_index) const {

Review Comment:
   因为可能会有大量的 page zonemap, 如果放在 shared_ptr 里面会有大量的堆内存申请&释放,对性能应该还是有一定影响的



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