# On Windows, "re-generating" existing thumbnails takes a long time when there are many images

**URL:** <https://forum.getkirby.com/t/on-windows-re-generating-existing-thumbnails-takes-a-long-time-when-there-are-many-images/7794>\
**Category:** Questions\
**Tags:** v2\
**Created:** [June 22, 2017, 8:43pm UTC](https://forum.getkirby.com/t/on-windows-re-generating-existing-thumbnails-takes-a-long-time-when-there-are-many-images/7794 "2017-06-22T20:43:41Z")\
**Posts on this page:** 1\
**Showing post:** 6

<div class="post-metadata">

**Author:** ![texnixe](https://dub1.discourse-cdn.com/flex017/user_avatar/forum.getkirby.com/texnixe/32/5754_2.png) [@texnixe](https://forum.getkirby.com/u/texnixe)\
**Post date:** [June 24, 2017, 8:01pm UTC](https://forum.getkirby.com/t/on-windows-re-generating-existing-thumbnails-takes-a-long-time-when-there-are-many-images/7794/6 "2017-06-24T20:01:37Z")

</div>

Well, as I said, I don’t know what is happening there, maybe it is somehow related to [this issue](https://forum.getkirby.com/t/image-resize-crop-doesnt-use-previous-generated-files/6436/37), although there is no talk of the cache being involved. How many images are we talking about?

The thumb constructor only generates a new thumb if the thumb does not exist yet. So there must be something else causing the delay. We are currently investigating the other issue.

---

_[View the full topic](https://forum.getkirby.com/t/on-windows-re-generating-existing-thumbnails-takes-a-long-time-when-there-are-many-images/7794)._