Re: [O] Why navigating in Org mode is so slow in overview mode?

[Nicolas Goaziou]

Gregor Zattler <address@hidden> writes:

> - but there some hangs now and then.

Is it a complete freeze (i.e., you need to use C-g to get out of the
loop) or a slowdown of a couple of seconds? 

The former is a bug. However, some changes in the buffer imply a massive
loss of the cache (e.g., inserting a block clears cache in the whole
section), so the next action can be slow since you need to fill it
again, hence the slowdown.

> At that moment I cannot
>   start the profiler.  If I start the profiler at the
>   beginning of using this org file and stop it maybe hours later
>   after something was slow: Would such report be helpful?

It might not give any useful information. However, the best way to know
is to look at it.

Regards,