Repository: duckdb/duckdb
File: src/storage/caching_file_system.cpp (C++)

Code before:
	if (file_handle || should_validate) {
		GetFileHandle();
		return last_modified;
	}
	auto guard = cached_file.lock.GetSharedLock();
	return cached_file.LastModified(guard);
}

string CachingFileHandle::GetVersionTag() {
	const bool should_validate =
	    ShouldValidate(path, context.GetClientContext(), caching_file_system.db, cached_file.path);
	if (file_handle || should_validate) {
		GetFileHandle();
		return version_tag;
	}
	auto guard = cached_file.lock.GetSharedLock();
	return cached_file.VersionTag(guard);
}

bool CachingFileHandle::Validate() const {
	return ShouldValidate(path, context.GetClientContext(), caching_file_system.db, cached_file.path);
}

bool CachingFileHandle::CanSeek() {
	const bool should_validate =
	    ShouldValidate(path, context.GetClientContext(), caching_file_system.db, cached_file.path);
	if (file_handle || should_validate) {
		return GetFileHandle().CanSeek();
	}
	auto guard = cached_file.lock.GetSharedLock();
	return cached_file.CanSeek(guard);
}

bool CachingFileHandle::IsRemoteFile() const {
	return FileSystem::IsRemoteFile(cached_file.path);
}

bool CachingFileHandle::OnDiskFile() {
	const bool should_validate =
	    ShouldValidate(path, context.GetClientContext(), caching_file_system.db, cached_file.path);
	if (file_handle || should_validate) {
		return GetFileHandle().OnDiskFile();
	}
	auto guard = cached_file.lock.GetSharedLock();
	return cached_file.OnDiskFile(guard);
}

const string &CachingFileHandle::GetVersionTag(const unique_ptr<StorageLockKey> &guard) {
	const bool should_validate =
	    ShouldValidate(path, context.GetClientContext(), caching_file_system.db, cached_file.path);
	if (file_handle || should_validate) {

Review comment (performance):
This seems to be repeated a few times:
```c++
	const bool should_validate =
	    ShouldValidate(path, context.GetClientContext(), caching_file_system.db, cached_file.path);
```
While `Validate()` can be called instead, which clean this up quite a bit. You can check `if (file_handle || Validate())`.

Code after:
string CachingFileHandle::GetVersionTag() {
	if (file_handle || Validate()) {
		GetFileHandle();
		return version_tag;
	}
	auto guard = cached_file.lock.GetSharedLock();
	return cached_file.VersionTag(guard);
}

bool CachingFileHandle::Validate() const {
	return ShouldValidate(path, context.GetClientContext(), caching_file_system.db, cached_file.path);
}

bool CachingFileHandle::CanSeek() {
	if (file_handle || Validate()) {
		return GetFileHandle().CanSeek();
	}
	auto guard = cached_file.lock.GetSharedLock();
	return cached_file.CanSeek(guard);
}

bool CachingFileHandle::IsRemoteFile() const {
	return FileSystem::IsRemoteFile(cached_file.path);
}

bool CachingFileHandle::OnDiskFile() {
	if (file_handle || Validate()) {
		return GetFileHandle().OnDiskFile();
	}
	auto guard = cached_file.lock.GetSharedLock();
	return cached_file.OnDiskFile(guard);
}

const string &CachingFileHandle::GetVersionTag(const unique_ptr<StorageLockKey> &guard) {
	if (file_handle || Validate()) {
		GetFileHandle();
		return version_tag;
	}
	return cached_file.VersionTag(guard);
}

idx_t CachingFileHandle::SeekPosition() {
	return position;
}

void CachingFileHandle::Seek(idx_t location) {
	position = location;
	if (file_handle != nullptr) {
		file_handle->Seek(location);
	}
}