https://bugs.winehq.org/show_bug.cgi?id=45208
--- Comment #21 from Dmitry Timoshkov dmitry@baikal.ru --- (In reply to Zebediah Figura from comment #12)
Anyway, with regards to this bug, Hans Leidekker has found that on Windows the ProcessBranding action in fact takes over 5 seconds to execute. This is apparently because it triggers native MSI to rebuild the string pool. Obviously this is not a behaviour we would want to try to match, so I'm sort of inclined to resolve this WONTFIX, unless anyone has any other opinions.
Do you know why this problem didn't happen before your custom action handling rewrite? Is there a way to go backwards in behaviour with current code base?