Performance of subject list

Closes #84 (closed)

added 15 commits

• 7999aced...be6747df - 13 commits from branch master
• ca0bdb22 - Merge remote-tracking branch 'origin/master' into 84-performance-of-subject-list
• 86303696 - Merge branch 'master' into 84-performance-of-subject-list

Compare with previous version

enabled an automatic merge when the pipeline for 86303696 succeeds

mentioned in commit 44b7a137

merged