From 1c3bde7e4e6f5ae5624317214f4424355ca105eb Mon Sep 17 00:00:00 2001
From: discord9 <discord9@163.com>
Date: Thu, 10 Jul 2025 10:48:38 +0800
Subject: [PATCH] docs: explain fast path

Signed-off-by: discord9 <discord9@163.com>
---
 src/flow/src/batching_mode/time_window.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/flow/src/batching_mode/time_window.rs b/src/flow/src/batching_mode/time_window.rs
index 795de2cd8c..4739994218 100644
--- a/src/flow/src/batching_mode/time_window.rs
+++ b/src/flow/src/batching_mode/time_window.rs
@@ -150,6 +150,8 @@ impl TimeWindowExpr {
             }
         }
 
+        // FAST PATH: if we have eval_time_original and eval_time_window_size,
+        // we can compute the bounds directly
         if let (Some(original), Some(window_size)) =
             (self.eval_time_original, self.eval_time_window_size)
         {