# 380k files, 24GB in directory results in very slow sync = 8 days

**URL:** https://forum.syncthing.net/t/380k-files-24gb-in-directory-results-in-very-slow-sync-8-days/21488
**Category:** Support
**Created:** [January 20, 2024, 11:06am UTC](https://forum.syncthing.net/t/380k-files-24gb-in-directory-results-in-very-slow-sync-8-days/21488 "2024-01-20T11:06:49Z")
**Posts on this page:** 1
**Showing post:** 29

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### Author: ![calmh](https://forum.syncthing.net/user_avatar/forum.syncthing.net/calmh/32/15311_2.png) [@calmh](https://forum.syncthing.net/u/calmh)
#### Post date: [January 23, 2024, 10:13am UTC](https://forum.syncthing.net/t/380k-files-24gb-in-directory-results-in-very-slow-sync-8-days/21488/29 "2024-01-23T10:13:26Z")

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I’m fairly sure that the problem with case insensitivity is not the CPU or RAM used for the checks, but the repeated recursive listdir:s to figure out proper casing. Especially for large directories listdir can take a really long time (in computer terms). We could potentially do more aggressive (=longer) caching of the results.

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