# Duplicati Performance tests / Benchmarks. DB Recreate, backup speed, Block-size changes etc

**URL:** https://forum.duplicati.com/t/duplicati-performance-tests-benchmarks-db-recreate-backup-speed-block-size-changes-etc/13796
**Category:** Comparison
**Created:** [January 25, 2022, 12:15pm UTC](https://forum.duplicati.com/t/duplicati-performance-tests-benchmarks-db-recreate-backup-speed-block-size-changes-etc/13796 "2022-01-25T12:15:13Z")
**Posts on this page:** 1
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### Author: ![arberg](https://forum.duplicati.com/user_avatar/forum.duplicati.com/arberg/32/3433_2.png) [@arberg](https://forum.duplicati.com/u/arberg)
#### Post date: [January 25, 2022, 12:15pm UTC](https://forum.duplicati.com/t/duplicati-performance-tests-benchmarks-db-recreate-backup-speed-block-size-changes-etc/13796/1 "2022-01-25T12:15:13Z")

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I’m running some tests to try to get an idea of what affects duplicati performance. Are there already data available on this forum, elsewhere, or some data that somebody has hidden in their personal archive and would like to share?

I’m curious about things that will affect backup experience. Such as

DB Recreate speed, as compared to local-database size (or other relevant metric, source set etc., block size). This is a VERY important parameter (I have discovered) as we don’t want our restore to take a year (I found a thread with a user who had 60 GB local db, and restored 1% a day, crazy since recreate gets slower towards the end, probably hdd based restore by my guess).

Backup speed with different block-sizes.

Backup-speed on empty local db, and backup-speed whene there are already tons of blocks to search through. The latter giving some insight into long-term price of having low block-size.

I’m contemplating collecting stuff like this and writing a much more thorough guide to what to check for new users with large back-sets (TB sizes).

I’m already collecting data based on my own tests, but I’m sure there’s tons out there. I’m especially interested in like AB-tests, where two different identical backups / restores have been made on the same hardware, so we can compare effect of settings and local db size.

Best Alex

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