Duplicates the functionality seen in the Sitecore stats.aspx admin page using Sitecore PowerShell Extensions.

SitecoreRenderingStats.ps1

$items = [Sitecore.Diagnostics.Statistics]::RenderingStatistics
$props = @{
    Property = @(
        @{Label="Rendering"; Expression={$_.TraceName} },
        @{Label="Site"; Expression={$_.SiteName} },
        @{Label="Count"; Expression={$_.RenderCount} },
        @{Label="From cache"; Expression={$_.UsedCache} },
        @{Label="Avg. time (ms)"; Expression={$_.AverageTime.TotalMilliseconds} },
        @{Label="Avg. items"; Expression={$_.AverageItemsAccessed} },
        @{Label="Max. time"; Expression={$_.MaxTime.TotalMilliseconds} },
        @{Label="Max. items"; Expression={$_.MaxItemsAccessed} },
        @{Label="Total time"; Expression={$_.TotalTime} },
        @{Label="Total items"; Expression={$_.TotalItemsAccessed} },
        @{Label="Last run"; Expression={[Sitecore.DateUtil]::ToServerTime($_.LastRendered)} }
    )
}
    
$items | Sort-Object -Property "SiteName","TraceName" | Show-ListView @props