perf: cache the generated json for an iconview image

before:

|--13.95%--JSDialogNotifyIdle::Invoke
|          |
|          |--13.01%--JSDialogNotifyIdle::generateWidgetUpdate
|          |          |
|          |          |--11.03%--IconView::DumpAsPropertyTree
|          |          |          lcl_DumpEntryAndSiblings (inlined)
|          |          |          |
|          |          |          |--10.94%--extractPngString (inlined)

after:

|--4.86%--JSDialogNotifyIdle::Invoke
...
|          |--2.90%--JSDialogNotifyIdle::generateWidgetUpdate
|          |          |
|          |          |--0.76%--IconView::DumpAsPropertyTree
|          |          |          IconView::DumpEntryAndSiblings
|          |          |          Link<std::tuple<tools::JsonWriter&, rtl::OUString const&, std::basic_string_view<char, std::char_traits<char> > > const&, bool>::Call (inlined)
|          |          |          StylesPreviewWindow_Base::DoJsonProperty
|          |          |          |
|          |          |          |--0.55%--StylesPreviewWindow_Base::GetCachedPreviewJson

Change-Id: Id234a84e36710794822945584be3adf028808625
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/152630
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolan.mcnamara@collabora.com>

0 files changed, 0 insertions, 0 deletions