基本类型转换性能基准测试：

    1. john@john-B85M:~/Workspace/Go/GOPATH/src/github.com/gogf/gf/v2/util/gconv$ go test *.go -bench=".*" -benchmem
    2. goos: linux
    3. goarch: amd64
    4. BenchmarkString-4               20000000                71.8 ns/op            24 B/op          2 allocs/op
    5. BenchmarkInt-4                  100000000               22.2 ns/op             8 B/op          1 allocs/op
    6. BenchmarkInt8-4                 100000000               24.5 ns/op             8 B/op          1 allocs/op
    7. BenchmarkInt16-4                50000000                23.8 ns/op             8 B/op          1 allocs/op
    8. BenchmarkInt32-4                100000000               24.1 ns/op             8 B/op          1 allocs/op
    9. BenchmarkInt64-4                100000000               21.7 ns/op             8 B/op          1 allocs/op
    10. BenchmarkUint-4                 100000000               22.2 ns/op             8 B/op          1 allocs/op
    11. BenchmarkUint8-4                50000000                25.6 ns/op             8 B/op          1 allocs/op
    12. BenchmarkUint16-4               50000000                32.1 ns/op             8 B/op          1 allocs/op
    13. BenchmarkUint32-4               50000000                27.7 ns/op             8 B/op          1 allocs/op
    14. BenchmarkUint64-4               50000000                28.1 ns/op             8 B/op          1 allocs/op
    15. BenchmarkFloat32-4              10000000               155 ns/op              24 B/op          2 allocs/op
    16. BenchmarkFloat64-4              10000000               177 ns/op              24 B/op          2 allocs/op
    17. BenchmarkTime-4                  5000000               240 ns/op              72 B/op          4 allocs/op
    18. BenchmarkTimeDuration-4         50000000                26.2 ns/op             8 B/op          1 allocs/op
    19. BenchmarkBytes-4                10000000               149 ns/op             128 B/op          3 allocs/op
    20. BenchmarkStrings-4              10000000               223 ns/op              40 B/op          3 allocs/op
    21. BenchmarkInts-4                 20000000                55.0 ns/op            16 B/op          2 allocs/op
    22. BenchmarkFloats-4               10000000               186 ns/op              32 B/op          3 allocs/op
    23. BenchmarkInterfaces-4           20000000                66.6 ns/op            24 B/op          2 allocs/op
    24. PASS
    25. ok      command-line-arguments  35.356s