IL2CPP performance for android

i test performance for android il2cpp with this code:

   int TestPerformance()
    {
        var keys = myDic.Keys;
    
        int total = 0;
        foreach (var key in keys)
        {
            var valStr = myDic [key];
            total += valStr.Length;
        }

        return total;
    }

the myDic size is 10,000, type is Dictionary<string, string>
the time cost of the iL2CPP version is about 21MS
the time cost of the mono version is about only 8MS

May wish to file a bug in case the post is missed by developers.