thinkeridea / go-extend Goto Github PK
View Code? Open in Web Editor NEWgo语言扩展包，收集一些常用的操作函数，辅助更快的完成开发工作，并减少重复代码
Home Page: https://pkg.go.dev/github.com/thinkeridea/go-extend
License: MIT License
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加快内网地址检查，172.16~31.0.0/12 其掩码地址均为 172.16.0.0/12 存在重复
"10.0.0.0/8",
"169.254.0.0/16",
"172.16.0.0/12",
"172.17.0.0/12",
"172.18.0.0/12",
"172.19.0.0/12",
"172.20.0.0/12",
"172.21.0.0/12",
"172.22.0.0/12",
"172.23.0.0/12",
"172.24.0.0/12",
"172.25.0.0/12",
"172.26.0.0/12",
"172.27.0.0/12",
"172.28.0.0/12",
"172.29.0.0/12",
"172.30.0.0/12",
"172.31.0.0/12",
"192.168.0.0/16",
172.16~31.0.0/12 其掩码地址均为 172.16.0.0/12 存在重复。
使用直接对比ip段前两段数据检查，不使用 network.Contains 判断，在暂时不支持IPV6 的前提下，这种方法更加高效。
扩展 utf8 提供根据字符数量确定字符串索引位置
使用 utf8.DecodeRuneInString 逐个解析字符，使得比把字符串转为 []rune 运行效率更高，但是这并不是最好的解决方案，我需要一个方法在字符串中计算指定数量字符的索引位置，使得可以高效的利用字符串切片获得高效处理多字节字符的方案。
灵感来自 #5
建议采用更宽松的license,目前的gpl不利于库被更多项目使用
go的编译基本只能静态编译，这样gpl的传染性导致所有的代码都得开源，
这样其实不利于本库得到更多的使用，
相当多的go库都采用mit license
“动态评估bytes.Buffer的需求的容量，全局共享bytes.Buffer池” 这个pr存在性能测试问题，导致结果存在偏差
#16 在性能测试时，对SyncPool 测试时并没有对 Buffer 进行 Reset 操作，导致大量内存分配，测试结果没有参考性。
在完善测试用例后，以下测试结果并没有相较 sync.Pool 有明显优势，且可能对性能产生影响。
goos: darwin
goarch: amd64
pkg: github.com/thinkeridea/go-extend/pool/benchmark
BenchmarkBufferPool
BenchmarkBufferPool-8 943312 1065 ns/op 1 B/op 0 allocs/op
BenchmarkBufferSyncPool
BenchmarkBufferSyncPool-8 1000000 1032 ns/op 0 B/op 0 allocs/op
BenchmarkBufferFixedSizePool
BenchmarkBufferFixedSizePool-8 29174670 44.1 ns/op 0 B/op 0 allocs/op
BenchmarkBufferFixedSizeSyncPool
BenchmarkBufferFixedSizeSyncPool-8 38488425 28.1 ns/op 0 B/op 0 allocs/op
PASS
ok github.com/thinkeridea/go-extend/pool/benchmark 5.236s
改变 pool.NewBuffer 的行为，响应固定容量的BufferPool
BUG: Round(169543.34596, -5) == 199999.99999999997, want 200000
RT
四舍五入函数存在精度问题
https://github.com/thinkeridea/go-extend/blob/main/exmath/round.go
四舍五入函数存在精度问题，如0.565保留两位小数输出的是0.56而不是0.57
IPString2Long和Long2IPString 能否支持IPV6？
exstrings.Reverse 性能改进
该方法收集于官网 How to write Go code 中的一个代码片段，因曾经面试遇到这个面试题而留心。
近期回答 Go Forum 中关于 [SOLVED] String size of 20 character 中字符串长度截取使用 []rune 类型与字符串类型转换，期望处理安全的 unicode 字符。
我对此方法提出了性能质疑，编写了基于 utf8.DecodeRuneInString 的计算版本，并做了性能测试 相关回复在这里 发现两个种方法性能差距惊人。
我想到了 go-extend 中的 exstrings.Reverse 方法也是用了类似的类型转换，所以我做了一个小的实验来测试不同实现的性能。
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