5
golang timer 性能消耗
source link: https://blog.csdn.net/oqqYuan1234567890/article/details/116404039
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由于 golang 的 timer 是高精度定时器，所以在使用 timer 的时候，需要注意精度与性能的平衡
下面跑几个简单的 demo, 绝对值没有参考意义，主要观察其趋势变化
定时器间隔 （ms）1101001000CPU 占用6.6%1.8%0.2%0%
可以发现，当间隔到了 1ms 的时候，CPU 会占用到 7%， 而间隔到了 1s, 则基本不占用 CPU。这是因为 go 的 timer 是高精度的定时器，相关的 github 讨论如下：https://github.com/golang/go/issues/41699
package main
import (
"time"
)
func main() {
ticker := time.NewTicker(1 * time.Millisecond)
i := 0
for range ticker.C {
i++
}
}
package main
import (
"time"
)
func main() {
ticker := time.NewTicker(10 * time.Millisecond)
i := 0
for range ticker.C {
i++
}
}
package main
import (
"time"
)
func main() {
ticker := time.NewTicker(100 * time.Millisecond)
i := 0
for range ticker.C {
i++
}
}
package main
import (
"time"
)
func main() {
ticker := time.NewTicker(1000 * time.Millisecond)
i := 0
for range ticker.C {
i++
}
}
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