[Feature] any way to speed up the startup checking stage.

[xiaoyifang]

Is your feature request related to a problem? Please describe.
When the gd-ng starts,it will check the states of dictionary's index file . validate the integrity and check whether it reflects the newest changes in the dictionary etc .

Any way to boost the startup speed?

[xiaoyifang]

Possible steps:

1. when startup ,only processing the new added folders.
2. for the old dictionary index, delay checking the integrity and postphoned the checking logic.
   1. reindex the dictionaries found in step 3.
3. after application startup ,check the old dictionary index and mark the status . some dictionary index files may be needed to recreated or not.

maybe controlled by an option in preference .such as
[ ] delay checking.

[shenlebantongying]

Random note: there is a rescan button, but nobody seems aware of it 😅

Maybe mvoe it to under Edit to make is more accessible, then add an advanced option Disable startup indexing/checks.... For people with lots of dicts, they can choose to rescan only if they wish.