From 14a9eeb5a07e5ad4910e3cce75d312548733ee64 Mon Sep 17 00:00:00 2001
From: Jackson Sun <Jackson.Sun@autodesk.com>
Date: Wed, 10 Dec 2025 02:27:13 -0500
Subject: [PATCH] Speedup to detect the existence of files on Windows

Signed-off-by: Jackson Sun <jackson.sun@autodesk.com>
---
 src/libutil/filesystem.cpp | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/libutil/filesystem.cpp b/src/libutil/filesystem.cpp
index 8c0fccadc8..504cbd8480 100644
--- a/src/libutil/filesystem.cpp
+++ b/src/libutil/filesystem.cpp
@@ -330,8 +330,15 @@ Filesystem::path_is_absolute(string_view path, bool dot_is_absolute)
 bool
 Filesystem::exists(string_view path) noexcept
 {
+#ifdef _WIN32
+    // filesystem::exists is slow on Windows for network paths, so use the
+    // WinAPI directly
+    return INVALID_FILE_ATTRIBUTES
+           != GetFileAttributesW(Strutil::utf8_to_utf16wstring(path).c_str());
+#else
     error_code ec;
     return filesystem::exists(u8path(path), ec);
+#endif
 }