简单实现的无锁队列, 它现在还不能使用, 因为race delector报告的data race还未解决
goos: windows
goarch: amd64
pkg: example/lock-free
cpu: Intel(R) Core(TM) i7-8705G CPU @ 3.10GHz
BenchmarkQueue
BenchmarkQueue/Concurrent
BenchmarkQueue/Concurrent-8 4913110 221.1 ns/op 16 B/op 1 allocs/op
BenchmarkQueue/NoConcurrent
BenchmarkQueue/NoConcurrent-8 24479953 88.32 ns/op 16 B/op 1 allocs/op