Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

fs: improve ExistsSync performance on Windows #53537

Closed
wants to merge 1 commit into from
Closed

fs: improve ExistsSync performance on Windows #53537

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
29 changes: 14 additions & 15 deletions src/node_file.cc
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1003,24 +1003,23 @@ static void ExistsSync(const FunctionCallbackInfo<Value>& args) {
THROW_IF_INSUFFICIENT_PERMISSIONS(
env, permission::PermissionScope::kFileSystemRead, path.ToStringView());

uv_fs_t req;
auto make = OnScopeLeave([&req]() { uv_fs_req_cleanup(&req); });
FS_SYNC_TRACE_BEGIN(access);
int err = uv_fs_access(nullptr, &req, path.out(), 0, nullptr);
FS_SYNC_TRACE_END(access);
std::error_code error{};
auto file_path = std::filesystem::path(path.ToStringView());
bool exists = false;

#ifdef _WIN32
// In case of an invalid symlink, `uv_fs_access` on win32
// will **not** return an error and is therefore not enough.
// Double check with `uv_fs_stat()`.
if (err == 0) {
FS_SYNC_TRACE_BEGIN(stat);
err = uv_fs_stat(nullptr, &req, path.out(), nullptr);
FS_SYNC_TRACE_END(stat);
FS_SYNC_TRACE_BEGIN(stat);
auto status = std::filesystem::status(file_path, error);
FS_SYNC_TRACE_END(stat);
if (!error) {
exists = status.type() != std::filesystem::file_type::not_found;
}
#endif // _WIN32

args.GetReturnValue().Set(err == 0);
#else
FS_SYNC_TRACE_BEGIN(access);
exists = std::filesystem::exists(file_path, error);
FS_SYNC_TRACE_END(access);
#endif
args.GetReturnValue().Set(exists);
}

// Used to speed up module loading. Returns 0 if the path refers to
Expand Down
Loading