perf: use lexical symbol ids for rank ties

2026-09-05 06:14:49 +08:00
parent d7e11be01f
commit 52f9ee9d92
2 changed files with 11 additions and 18 deletions
@@ -5093,6 +5093,15 @@ mod tests {
        )
        .unwrap();

+        let lexical_symbols = ["000001.SZ", "000300.SH", "600000.SH"];
+        let lexical_symbol_ids = lexical_symbols.map(|symbol| data.symbol_id(symbol).unwrap());
+        assert!(
+            lexical_symbol_ids
+                .windows(2)
+                .all(|window| window[0] < window[1]),
+            "symbol ids are the stable lexical tie-break key"
+        );
+
        for symbol in ["000001.SZ", "600000.SH"] {
            let symbol_id = data.symbol_id(symbol).unwrap();
            let day = data.daily_snapshot_view(date);