The show filter should not contain the "All" option
Impact area
Performance
Severity
High
Affected element
Report
Rule ID
SF-0142
Impact
Unnecessary HTML increases the size of the component tree and the processing time for Ajax requests.
Remediation
Whenever you can, choose the My... or My Team's... options rather than All in the Show filter.
Time to fix
30 min
References
See the Salesforce documentation resource: Improve Report Performance > Best Practices