cfeck added a comment.
The XDG thumbnail spec has two thumbnail sizes, 128 and 256. It is possible that you hit the "slow" issue when only one size of thumbnail had been created, but the other was still pending. REPOSITORY R241 KIO REVISION DETAIL https://phabricator.kde.org/D12385 To: anemeth, #frameworks, #vdg Cc: cfeck, broulik, ngraham, #frameworks, michaelh, bruns