# Timeline navigation misbehaving starting from 10000 posts

**URL:** https://meta.discourse.org/t/timeline-navigation-misbehaving-starting-from-10000-posts/164100
**Category:** Support
**Created:** [September 15, 2020, 3:40pm UTC](https://meta.discourse.org/t/timeline-navigation-misbehaving-starting-from-10000-posts/164100 "2020-09-15T15:40:46Z")
**Posts on this page:** 1
**Showing post:** 2

<div class="post-metadata">

### Author: ![Falco](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/falco/32/179432_2.png) [@Falco](https://meta.discourse.org/u/Falco)
#### Post date: [September 15, 2020, 4:53pm UTC](https://meta.discourse.org/t/timeline-navigation-misbehaving-starting-from-10000-posts/164100/2 "2020-09-15T16:53:00Z")

</div>

> [@Canapin](#):
>
> If you drag’n drop the cursor on the timeline, it will scroll to the post, but won’t update the timeline cursor until you scroll again manually:

This is because

> [@Performance improvements on long topics?](https://meta.discourse.org/t/performance-improvements-on-long-topics/30187/27):
>
> Jumping to an index on the timeline becomes jumping to the closest post number on the timeline

> [@Canapin](#):
>
> Weirdly, even by increasing this setting to 15000, the timeline cursor doesn’t show the date on a 10000 posts thread

We remove a lot of features on mega topics to preserve performance. Our general recommendation is [The MEGATOPIC: public good, or public menace?](https://meta.discourse.org/t/the-megatopic-public-good-or-public-menace/85592)

> [@Topics over 10,000 posts remove "Frequent Posters"](https://meta.discourse.org/t/topics-over-10-000-posts-remove-frequent-posters/107671/4):
>
> Yes, server load gets exponentially higher with large topics. We put in some basic mitigations (you’ll note that dates don’t appear on the timeline, etc) but it’s still expensive.

> [@Topics over 10,000 posts remove "Frequent Posters"](https://meta.discourse.org/t/topics-over-10-000-posts-remove-frequent-posters/107671/6):
>
> The number of megatopics in the wild is minuscule, investing large amount of time optimising this means we have less time working on features which are much more commonly needed.

---

_[View the full topic](https://meta.discourse.org/t/timeline-navigation-misbehaving-starting-from-10000-posts/164100)._