Re: [patch suggestion] Mitigating the poor Emacs performance on huge org files: Do not use overlays for PROPERTY and LOGBOOK drawers

[Ihor Radchenko]

> Oops, you are right. I fixed this. It should be way faster. I can
> navigate in your example file without much trouble.
>
> Please let me know how it goes.

I tested with master + my personal config + native compilation of org,
Emacs native-comp branch, commit c984a53b4e198e31d11d7bc493dc9a686c77edae.
Did not see much improvement.
Vertical motion in the folded buffer is still quite slow.

> The last commits have nothing to do with unfolding.

Apparently I misunderstood the purpose of: 1027e0256
"Implement `org-cycle-hide-property-drawers'"

Best,
Ihor

Nicolas Goaziou <address@hidden> writes:

> Hello,
>
> Ihor Radchenko <address@hidden> writes:
>
>> Just tested the master branch.
>> Three observations on large org file:
>>
>> 1. Next/previous line on folder buffer is still terribly slow
>
> Oops, you are right. I fixed this. It should be way faster. I can
> navigate in your example file without much trouble.
>
> Please let me know how it goes.
>
>> 2. Unfolding speed does not seem to be affected by the last commits - it
>> is still much slower than text property version. There might be some
>> improvement if I run Emacs for longer time though (Emacs generally
>> becomes slower over time).
>
> The last commits have nothing to do with unfolding.
>
> I'm not pretending that overlays are faster than text properties,
> either.
>
> With the current implementation property drawers add no overhead : last
> commits reduce drastically the number of overlays active in a buffer at
> a given time.
>
>> 3. <TAB> <TAB> on a headline with several levels of subheadings moves
>> the cursor to the end of subtree, which did not happen in the past.
>
> Indeed. I fixed that, too. Thank you!
>
> Regards,
>
> -- 
> Nicolas Goaziou

-- 
Ihor Radchenko,
PhD,
Center for Advancing Materials Performance from the Nanoscale (CAMP-nano)
State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong 
University, Xi'an, China
Email: address@hidden, address@hidden