# Excessively long save operation when writing chapter metadata in audiobook files

**URL:** https://community.mp3tag.de/t/excessively-long-save-operation-when-writing-chapter-metadata-in-audiobook-files/58931
**Category:** Support
**Created:** [October 31, 2022, 8:27am UTC](https://community.mp3tag.de/t/excessively-long-save-operation-when-writing-chapter-metadata-in-audiobook-files/58931 "2022-10-31T08:27:35Z")
**Posts on this page:** 1
**Showing post:** 12

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### Author: ![ohrenkino](https://community.mp3tag.de/user_avatar/community.mp3tag.de/ohrenkino/32/4843_2.png) [@ohrenkino](https://community.mp3tag.de/u/ohrenkino)
#### Post date: [November 1, 2022, 6:39am UTC](https://community.mp3tag.de/t/excessively-long-save-operation-when-writing-chapter-metadata-in-audiobook-files/58931/12 "2022-11-01T06:39:14Z")

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Here is a thread that reports a similar behaviour.  
But apparently that never got to an end:

> [@Extremely poor performance with m4b audiobooks](https://community.mp3tag.de/t/extremely-poor-performance-with-m4b-audiobooks/54232):
>
> When trying to retag some audiobooks in my collection, I noticed the poor performance with m4b audiobooks. Tagging works fine, but saving takes a lot of time. A folder of about 100 audiobooks took several hours just to save. The bigger the file is, the longer the save time. Is there anything that can be done about this? Many thanks, keep up the great work slight_smile

It would be nice if such a file could be supplied for testing purposes.  
Also, there has been a report about MP3tag loading files and the defender.

> [@Windows Defender - Speed of loading files in MP3Tag](https://community.mp3tag.de/t/windows-defender-speed-of-loading-files-in-mp3tag/47784):
>
> In the past I already noticed that the antivirus-software of windows-defender slows down the loading speed of files in MP3Tag dramatically: At this time my third-party antivirus-software (Avast) had been gotten accidently deactivated and windows-defender activated. This time I wanted to give windows-defender a second chance, deinstalled Avast and activated the defender. The same happened as before: Mp3Tag became very slow in loading files in spite of the activated library-function. I tes…

Perhaps this contributes to the problem

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