By default, Archive Search has been disabled on Artifactory self-hosted platforms since version 7.15.
Therefore, if you have been using Artifactory with this feature disabled, you will not notice any change in performance as a result of the deprecation.
If, however, you have been using Artifactory with Archive Search enabled, Artifactory performance will be improved as a result of the deprecation due to a reduction of upload-related events and a decrease in database-related activities. Browsing JAR archives and associated files will still be available via API or the product UI.