type A struct {
a int
}
func gen() []*A {
r := make([]*A, 1000000)
for i := 0; i < len(r); i++ {
r[i] = &A{i}
}
return r
}
//var as []*A = gen()
func main() {
go func() {
err := http.ListenAndServe(":8034", nil)
if err != nil {
//fmt.Printf("ListenAndServe:%s\n", err)
}
}()
var as []*A = gen()
fmt.Println(as[0])
time.Sleep(100 * time.Second)
}
when debug gc:
1) if the "var as []*A = gen()" is in main , the debug info is : gc 4
@2.757s 0%: 0.049+0.59+0.025 ms clock, 2.3+0/0.54/0.28+1.2 ms cpu,
16->16->0 MB, 31 MB goal, 48 P (forced)
2) if the "var as []*A = gen()" is not in main, the debug info is: gc 9
@7.172s 0%: 0.077+25+0.020 ms clock, 3.7+0/24/0.73+0.99 ms cpu, 16->16->15
MB, 31 MB goal, 48 P (forced)
Anybody konw why the mark time (red numbers) is so different? go version
is 1.12.7.
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