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Issue #7183

Updated by dalley almost 4 years ago

The following results were gathered by migrating the following repos with multi-tasking parallelism turned off (because it makes prevents gathering profiles like this basically impossible). these profiles) 

 * Fedora 30 release & update repositories 
 * Fedora 31 release & update repositories 
 * Centos 6 & Centos 7 
 * Centos 8 AppStream and BaseOS 

 It's something like ~230,000 content units in total 

 Initial migration 

 ![](many_repo_initial_migration.png) 

 Remigration 

 ![](many_repo_re_migration.png) 

 As you can see in both the intitial and subsequent migrations, the pre-migration of content is by far the most significant contributor to runtime, and it's not parallelized so this effect is completely unmitigated.    We need to figure out how to improve this.

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