From 2c424e3616c0ad857d3e7e887677d87a8e3fe1b4 Mon Sep 17 00:00:00 2001
From: drryanhuang <zihaohuang@aliyun.com>
Date: Wed, 18 Dec 2024 03:10:06 +0000
Subject: [PATCH] add comment

---
 paddlespeech/t2s/modules/fftconv1d.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/paddlespeech/t2s/modules/fftconv1d.py b/paddlespeech/t2s/modules/fftconv1d.py
index 55994bc24..ae5fc7e82 100644
--- a/paddlespeech/t2s/modules/fftconv1d.py
+++ b/paddlespeech/t2s/modules/fftconv1d.py
@@ -205,6 +205,9 @@ class FFTConv1D(paddle.nn.Layer):
                           self.padding)
 
 
+# Currently, the API unfold in Paddle is extremely slow, so __unfold is implemented 
+# using the `.strides` and `.as_strided` APIs. However, these are only supported in 
+# Paddle version 2.6 and above, so F.conv1d and Conv1D are used as replacements.
 version = paddle.__version__
 
 if version < '2.6':