Interesting read: How to Query File Attributes 50x faster on Windows

[Rollo62 601]

Hi there,

via WholeTomato
https://www.wholetomato.com/blog/2024/11/14/how-to-query-file-attributes-50x-faster-on-windows/?utm_source=Eloqua&utm_medium=email&utm_content=Article-250314-WT-50xfaster

[Anders Melander 2059]

Interesting but... TLDR; the "50x faster" only applies if:

• You are using the C++17 std::filesystem now.
• You are using GetFileAttributesEx now to get the attributes.

In IOUtils the TFile.GetSize function is the only one using GetFileAttributes* directly. Unfortunately IOUtils defers to SysUtils for many of its function and there's widespread use of GetFileAttributes* in there.

Interestingly SysUtils contains an internal GetFileAttributesExEmulated function that is implemented using FindFirstFile but unfortunately that is only used from the FileAge functions and only in case of a sharing violation.