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对于任意的库，Benchmarking在评估性能和提升性能的时候都是必须的。
我基准测试了两个事情：
- 加载100和1000个规则到KnowledgeBase
- 针对100个规则和1000个规则，使用一个fact去执行规则。
通过改变N值，所有的测试都将跑很多次去测试性能。
N is b.N where b is an instance of *testing.B
100_rules.grl 和 1000_rules.grl 文件 在 examples/benchmark 目录
> go test -bench=. -benchmem
goos: darwin
goarch: amd64
Number of Cores - 6
Ram - 16 GB 2400 MHz DDR4
pkg: github.com/hyperjumptech/grule-rule-engine/examples/benchmark
Benchmark_Grule_Load_Rules/100_rules-12 60 20968700 ns/op 8871574 B/op 216554 allocs/op
Benchmark_Grule_Load_Rules/100_rules#01-12 60 20800060 ns/op 8871255 B/op 216552 allocs/op
Benchmark_Grule_Load_Rules/100_rules#02-12 60 21284699 ns/op 8871410 B/op 216553 allocs/op
Benchmark_Grule_Load_Rules/100_rules#03-12 61 20414968 ns/op 8871317 B/op 216552 allocs/op
Benchmark_Grule_Load_Rules/100_rules#04-12 58 20618596 ns/op 8871612 B/op 216554 allocs/op
Benchmark_Grule_Load_Rules/100_rules#05-12 60 21217303 ns/op 8871294 B/op 216552 allocs/op
Benchmark_Grule_Load_Rules/100_rules#06-12 67 21312189 ns/op 8871592 B/op 216554 allocs/op
Benchmark_Grule_Load_Rules/100_rules#07-12 61 20592475 ns/op 8871213 B/op 216552 allocs/op
Benchmark_Grule_Load_Rules/100_rules#08-12 60 22628754 ns/op 8871388 B/op 216553 allocs/op
Benchmark_Grule_Load_Rules/100_rules#09-12 68 21192157 ns/op 8871223 B/op 216552 allocs/op
Benchmark_Grule_Load_Rules/100_rules#10-12 60 21242572 ns/op 8871226 B/op 216552 allocs/op
Benchmark_Grule_Load_Rules/1000_rules-12 6 209761389 ns/op 88641262 B/op 2141287 allocs/op
Benchmark_Grule_Load_Rules/1000_rules#01-12 6 204268674 ns/op 88644670 B/op 2141304 allocs/op
Benchmark_Grule_Load_Rules/1000_rules#02-12 6 210895687 ns/op 88639476 B/op 2141278 allocs/op
Benchmark_Grule_Load_Rules/1000_rules#03-12 6 214102248 ns/op 88642209 B/op 2141293 allocs/op
Benchmark_Grule_Load_Rules/1000_rules#04-12 5 268977045 ns/op 88639793 B/op 2141279 allocs/op
Benchmark_Grule_Load_Rules/1000_rules#05-12 5 211837045 ns/op 88641822 B/op 2141289 allocs/op
Benchmark_Grule_Load_Rules/1000_rules#06-12 6 221863753 ns/op 88642209 B/op 2141293 allocs/op
Benchmark_Grule_Load_Rules/1000_rules#07-12 6 223676073 ns/op 88643585 B/op 2141299 allocs/op
Benchmark_Grule_Load_Rules/1000_rules#08-12 6 224317362 ns/op 88643070 B/op 2141297 allocs/op
Benchmark_Grule_Load_Rules/1000_rules#09-12 5 241930711 ns/op 88641422 B/op 2141289 allocs/op
Benchmark_Grule_Load_Rules/1000_rules#10-12 4 261857403 ns/op 88637592 B/op 2141269 allocs/op加载100规则到knowledgeBase耗费22628754 ns/op（取最高值），等于22.628754ms，同时需要(8871388 B/op) 8.8MB 内存。
加载1000规则到knowledgeBase耗费261857403 ns/op（取最高值），等于~261ms，同时需要 88MB 内存。
运行命令:
Load 100 and 1000 Rules into Grule rule Engine
Benchmark_Grule_Load_Rules/100_rules-12 12 96674568 ns/op 49297966 B/op 731119 allocs/op
Benchmark_Grule_Load_Rules/100_rules#01-12 12 97915910 ns/op 49293839 B/op 731103 allocs/op
Benchmark_Grule_Load_Rules/100_rules#02-12 12 97716674 ns/op 49293398 B/op 731129 allocs/op
Benchmark_Grule_Load_Rules/100_rules#03-12 12 97227219 ns/op 49299542 B/op 731145 allocs/op
Benchmark_Grule_Load_Rules/100_rules#04-12 12 99342047 ns/op 49295906 B/op 731131 allocs/op
Benchmark_Grule_Load_Rules/100_rules#05-12 12 98636912 ns/op 49297570 B/op 731228 allocs/op
Benchmark_Grule_Load_Rules/100_rules#06-12 12 98414282 ns/op 49297168 B/op 731122 allocs/op
Benchmark_Grule_Load_Rules/100_rules#07-12 12 97733003 ns/op 49299440 B/op 731184 allocs/op
Benchmark_Grule_Load_Rules/100_rules#08-12 12 98122635 ns/op 49297690 B/op 731132 allocs/op
Benchmark_Grule_Load_Rules/100_rules#09-12 12 98451525 ns/op 49292262 B/op 731055 allocs/op
Benchmark_Grule_Load_Rules/1000_rules-12 2 933617752 ns/op 488126636 B/op 7239752 allocs/op
Benchmark_Grule_Load_Rules/1000_rules#01-12 2 926896605 ns/op 488120920 B/op 7239869 allocs/op
Benchmark_Grule_Load_Rules/1000_rules#02-12 2 928509980 ns/op 488118076 B/op 7239757 allocs/op
Benchmark_Grule_Load_Rules/1000_rules#03-12 2 926093793 ns/op 488119492 B/op 7239927 allocs/op
Benchmark_Grule_Load_Rules/1000_rules#04-12 2 924214904 ns/op 488154840 B/op 7240215 allocs/op
Benchmark_Grule_Load_Rules/1000_rules#05-12 2 928009912 ns/op 488078180 B/op 7239902 allocs/op
Benchmark_Grule_Load_Rules/1000_rules#06-12 2 925822584 ns/op 488082700 B/op 7239303 allocs/op
Benchmark_Grule_Load_Rules/1000_rules#07-12 2 923116273 ns/op 488088032 B/op 7239301 allocs/op
Benchmark_Grule_Load_Rules/1000_rules#08-12 2 924545950 ns/op 488103888 B/op 7240207 allocs/op
Benchmark_Grule_Load_Rules/1000_rules#09-12 2 930476936 ns/op 488166652 B/op 7240389 allocs/op
加载100规则到knowledgeBase耗费99342047 ns/op（取最高值），等于~99.342047ms，同时需要(49295906 B/op) ~49.295906MB 内存。
加载1000规则到knowledgeBase耗费933617752 ns/op（取最高值），等于~933.617752ms，同时需要488126636 B/op ~488.126636MB 内存。
结果:
Benchmark_Grule_Execution_Engine/100_rules-12 140134 8175 ns/op 3939 B/op 59 allocs/op
Benchmark_Grule_Execution_Engine/100_rules#01-12 140442 8240 ns/op 3939 B/op 59 allocs/op
Benchmark_Grule_Execution_Engine/100_rules#02-12 141249 8151 ns/op 3937 B/op 59 allocs/op
Benchmark_Grule_Execution_Engine/100_rules#03-12 142011 8191 ns/op 3935 B/op 59 allocs/op
Benchmark_Grule_Execution_Engine/100_rules#04-12 137010 8226 ns/op 3947 B/op 59 allocs/op
Benchmark_Grule_Execution_Engine/100_rules#05-12 122870 9112 ns/op 3989 B/op 59 allocs/op
Benchmark_Grule_Execution_Engine/100_rules#06-12 133470 9697 ns/op 3957 B/op 59 allocs/op
Benchmark_Grule_Execution_Engine/100_rules#07-12 135206 8210 ns/op 3952 B/op 59 allocs/op
Benchmark_Grule_Execution_Engine/100_rules#08-12 139328 8213 ns/op 3941 B/op 59 allocs/op
Benchmark_Grule_Execution_Engine/100_rules#09-12 136437 8287 ns/op 3949 B/op 59 allocs/op
Benchmark_Grule_Execution_Engine/1000_rules-12 1912 525881 ns/op 273244 B/op 3843 allocs/op
Benchmark_Grule_Execution_Engine/1000_rules#01-12 2014 508415 ns/op 260310 B/op 3651 allocs/op
Benchmark_Grule_Execution_Engine/1000_rules#02-12 1770 568959 ns/op 293710 B/op 4147 allocs/op
Benchmark_Grule_Execution_Engine/1000_rules#03-12 1984 513188 ns/op 263958 B/op 3706 allocs/op
Benchmark_Grule_Execution_Engine/1000_rules#04-12 1771 566971 ns/op 293550 B/op 4145 allocs/op
Benchmark_Grule_Execution_Engine/1000_rules#05-12 1858 541169 ns/op 280695 B/op 3954 allocs/op
Benchmark_Grule_Execution_Engine/1000_rules#06-12 1896 530956 ns/op 275395 B/op 3875 allocs/op
Benchmark_Grule_Execution_Engine/1000_rules#07-12 1939 522682 ns/op 269694 B/op 3790 allocs/op
Benchmark_Grule_Execution_Engine/1000_rules#08-12 1851 545408 ns/op 281652 B/op 3968 allocs/op
Benchmark_Grule_Execution_Engine/1000_rules#09-12 1844 543697 ns/op 282657 B/op 3983 allocs/op
在100个规则上执行fact，Grule引擎耗费~9697 ns/op（取最大值）, 约等于~0.009697ms, 和3957 B/op内存，这是相当快的了。
在1000个规则上执行fact，Grule引擎耗费~568959 ns/op（取最大值）, 约等于~0.568959ms, 和293710 B/op内存，这是相当快的了。