Bug 423500

Summary:	KFileItemPrivate::determineMimeTypeHelper blocks gui thread
Product:	[Frameworks and Libraries] frameworks-kio	Reporter:	Harald Sitter <sitter>
Component:	general	Assignee:	KIO Bugs <kio-bugs-null>
Status:	REPORTED ---
Severity:	normal	CC:	kdelibs-bugs, nate
Priority:	NOR
Version:	git master
Target Milestone:	---
Platform:	Other
OS:	Linux
See Also:	https://bugs.kde.org/show_bug.cgi?id=178678
Latest Commit:		Version Fixed In:
Bug Depends on:
Bug Blocks:	423082

Description Harald Sitter 2020-06-25 13:49:32 UTC

When SkipMimeTypeFromContent wasn't explicitly set the determination will always use the content. This will block the gui thread if the item is on a mounted remote file system such as sshfs or cifs as reading may take a while depending on network bandwith/latency and remote IO bandwith/latency.

Supposedly a simple isSlow() and then using the SkipMimeTypeFromContent branch would help mitigate this. Alas, possibly a bit awkward since we currently don't have an enum value that'd represent "we'll do what feels sane" auto mode.