Improve benchmark checks

[swebb2066]

No description provided.

[swebb2066]

Sample output:

Run on (8 X 2195.17 MHz CPU s)
CPU Caches:
L1 Data 32 KiB (x4)
L1 Instruction 32 KiB (x4)
L2 Unified 256 KiB (x4)
L3 Unified 6144 KiB (x1)
Load Average: 0.19, 0.05, 0.01

Benchmark	Time	CPU	Iterations
Testing disabled logging request	0.474 ns	0.474 ns	1000000000
Testing disabled logging request/threads:6	0.141 ns	0.849 ns	809199660
Logging static string	440 ns	440 ns	1593110
Logging static string with FMT	410 ns	410 ns	1698828
Logging int value with FMT	433 ns	433 ns	1616415
Logging int value with FMT/threads:6	1404 ns	5644 ns	136392
Logging int+float with FMT	570 ns	570 ns	1217421
Logging int+float with FMT/threads:6	1383 ns	6659 ns	123738
Logging int value with std::ostream	600 ns	600 ns	1158536
Logging int value with std::ostream/threads:6	1150 ns	5969 ns	116046
Logging int+float with std::ostream	1202 ns	1202 ns	584309
Logging int+float with std::ostream/threads:6	1156 ns	6308 ns	116718
NoFormat pattern: %m%n	783 ns	783 ns	890198
DateOnly pattern: [%d] %m%n	784 ns	784 ns	893790
DateClassLevel pattern: [%d] [%c] [%p] %m%n	806 ns	806 ns	897228
Logging int value with std::ostream to AsyncAppender	596 ns	596 ns	1170299
Logging int value with std::ostream to AsyncAppender/threads:6	967 ns	5326 ns	131532
`