Eason0729 commented on issue #1465:
URL:
https://github.com/apache/datafusion-sqlparser-rs/issues/1465#issuecomment-2418364763
I spent some time manually run `reg read sp fp`, and write down `rbp-rsp`.
<details>
<summary>Detail</summary>
> export RUSTFLAGS="-C force-frame-pointers=yes"
```
parse_query 12592
parse_boxed_query_body 12592
parse_select 17024
parse_optional_alias 256
parse_comma_separated 1056
parse_select 17024
parse_table_and_joins 10016
parse_derived_table_factor 2384
```
And here is some large struct(in byte):
```
Expr 296
Statement 3528
```
```
let parser = Parser::new(&GenericDialect {});
let sql = r#"
SELECT seq
FROM (
SELECT seq,
LEAD(seq) OVER (ORDER BY seq) AS next_seq
FROM parquet_table
) AS subquery
WHERE next_seq - seq > 1;
"#;
let stmt = parser.try_with_sql(sql).unwrap().parse_statement().unwrap();
print!("{}", stmt.to_string());
```
</details>
In this example, sqlparser consume about 140KB stack at peak, so I think
there is little to optimize in `sqlparser`.
I would try, but we still need to reduce stack usage on datafusion.
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