zhannngchen commented on code in PR #13336:
URL: https://github.com/apache/doris/pull/13336#discussion_r994388402
##########
be/src/exec/json_scanner.cpp:
##########
@@ -343,6 +346,8 @@ Status JsonReader::_parse_json_doc(size_t* size, bool* eof)
{
return Status::OK();
}
+ // clear memory here.
+ _origin_json_doc.GetAllocator().Clear();
Review Comment:
Why not just create a new `Document` each time we need to parse? It's not
reasonable to make _origin_json_doc as a class member variable?
##########
be/src/exec/json_scanner.h:
##########
@@ -178,7 +178,15 @@ class JsonReader {
std::vector<std::vector<JsonPath>> _parsed_jsonpaths;
std::vector<JsonPath> _parsed_json_root;
- rapidjson::Document _origin_json_doc; // origin json document object from
parsed json string
+ char _value_buffer[4 * 1024 * 1024];
+ char _parse_buffer[512 * 1024];
+
+ typedef rapidjson::GenericDocument<rapidjson::UTF8<>,
rapidjson::MemoryPoolAllocator<>,
+ rapidjson::MemoryPoolAllocator<>>
+ Document;
+ rapidjson::MemoryPoolAllocator<> _value_allocator;
+ rapidjson::MemoryPoolAllocator<> _parse_allocator;
Review Comment:
Dose `crtAllocator` a better choice?
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