
Prefetch the entire memory of structs and arrays and cache it instead of issuing readMemory calls only when we get down to primitive types. This reduces the number of system calls to ptrace that variables makes. Improves performance in general, greatly improving it in some particular cases (involving large structs). Benchmarks without prefetching: BenchmarkArray-4 10 132189944 ns/op 0.06 MB/s BenchmarkArrayPointer-4 5 202538503 ns/op 0.04 MB/s BenchmarkMap-4 500 3804336 ns/op 0.27 MB/s BenchmarkGoroutinesInfo-4 10 126397104 ns/op BenchmarkLocalVariables-4 500 2494846 ns/op Benchmarks with prefetching: BenchmarkArray-4 200 10719087 ns/op 0.76 MB/s BenchmarkArrayPointer-4 100 11931326 ns/op 0.73 MB/s BenchmarkMap-4 1000 1466479 ns/op 0.70 MB/s BenchmarkGoroutinesInfo-4 10 103407004 ns/op BenchmarkLocalVariables-4 1000 1530395 ns/op Improvement factors: BenchmarkArray 12.33x BenchmarkArrayPointer 16.97x BenchmarkMap 2.59x BenchmarkGoroutinesInfo 1.22x BenchmarkLocalVariables 1.63x
161 lines
3.8 KiB
Go
161 lines
3.8 KiB
Go
package main
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import (
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"fmt"
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"go/constant"
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"runtime"
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"unsafe"
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)
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type astruct struct {
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A int
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B int
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}
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type bstruct struct {
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a astruct
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}
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type cstruct struct {
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pb *bstruct
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sa []*astruct
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}
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func afunc(x int) int {
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return x + 2
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}
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func afunc1(x int) {
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}
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func afunc2() int {
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return 0
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}
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type functype func(int) int
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func (a *astruct) Error() string {
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return "not an error"
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}
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func (b *bstruct) Error() string {
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return "not an error"
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}
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type dstruct struct {
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x interface{}
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}
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type maptype map[string]interface{}
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type benchstruct struct {
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a [64]byte
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b [64]byte
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}
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func main() {
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i1 := 1
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i2 := 2
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f1 := 3.0
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i3 := 3
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p1 := &i1
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s1 := []string{"one", "two", "three", "four", "five"}
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s3 := make([]int, 0, 6)
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a1 := [5]string{"one", "two", "three", "four", "five"}
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c1 := cstruct{&bstruct{astruct{1, 2}}, []*astruct{&astruct{1, 2}, &astruct{2, 3}, &astruct{4, 5}}}
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s2 := []astruct{{1, 2}, {3, 4}, {5, 6}, {7, 8}, {9, 10}, {11, 12}, {13, 14}, {15, 16}}
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p2 := &(c1.sa[2].B)
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as1 := astruct{1, 1}
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var p3 *int
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str1 := "01234567890"
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var fn1 functype = afunc
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var fn2 functype = nil
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var nilslice []int = nil
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var nilptr *int = nil
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ch1 := make(chan int, 2)
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var chnil chan int = nil
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m1 := map[string]astruct{
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"Malone": astruct{2, 3},
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"Adenauer": astruct{},
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"squadrons": astruct{},
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"quintuplets": astruct{},
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"parasite": astruct{},
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"wristwatches": astruct{},
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"flashgun": astruct{},
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"equivocally": astruct{},
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"sweetbrier": astruct{},
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"idealism": astruct{},
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"tangos": astruct{},
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"alterable": astruct{},
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"quaffing": astruct{},
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"arsenic": astruct{},
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"coincidentally": astruct{},
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"hindrances": astruct{},
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"zoning": astruct{},
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"egging": astruct{},
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"inserts": astruct{},
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"adaptive": astruct{},
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"orientations": astruct{},
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"periling": astruct{},
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"lip": astruct{},
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"chant": astruct{},
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"availing": astruct{},
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"fern": astruct{},
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"flummoxes": astruct{},
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"meanders": astruct{},
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"ravenously": astruct{},
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"reminisce": astruct{},
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"snorkel": astruct{},
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"gutters": astruct{},
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"jibbed": astruct{},
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"tiara": astruct{},
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"takers": astruct{},
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"animates": astruct{},
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"Zubenelgenubi": astruct{},
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"bantering": astruct{},
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"tumblers": astruct{},
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"horticulturists": astruct{},
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"thallium": astruct{},
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}
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var mnil map[string]astruct = nil
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m2 := map[int]*astruct{1: &astruct{10, 11}}
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m3 := map[astruct]int{{1, 1}: 42, {2, 2}: 43}
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up1 := unsafe.Pointer(&i1)
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i4 := 800
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i5 := -3
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i6 := -500
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var err1 error = c1.sa[0]
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var err2 error = c1.pb
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var errnil error = nil
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var iface1 interface{} = c1.sa[0]
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var iface2 interface{} = "test"
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var iface3 interface{} = map[string]constant.Value{}
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var iface4 interface{} = []constant.Value{constant.MakeInt64(4)}
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var ifacenil interface{} = nil
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arr1 := [4]int{0, 1, 2, 3}
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parr := &arr1
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cpx1 := complex(1, 2)
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const1 := constant.MakeInt64(3)
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recursive1 := dstruct{}
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recursive1.x = &recursive1
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var iface5 interface{} = &recursive1
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var iface2fn1 interface{} = afunc1
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var iface2fn2 interface{} = afunc2
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var mapinf maptype = map[string]interface{}{}
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mapinf["inf"] = mapinf
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var bencharr [64]benchstruct
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var benchparr [64]*benchstruct
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for i := range benchparr {
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benchparr[i] = &benchstruct{}
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}
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var amb1 = 1
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runtime.Breakpoint()
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for amb1 := 0; amb1 < 10; amb1++ {
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fmt.Println(amb1)
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}
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runtime.Breakpoint()
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fmt.Println(i1, i2, i3, p1, amb1, s1, s3, a1, p2, p3, s2, as1, str1, f1, fn1, fn2, nilslice, nilptr, ch1, chnil, m1, mnil, m2, m3, up1, i4, i5, i6, err1, err2, errnil, iface1, iface2, ifacenil, arr1, parr, cpx1, const1, iface3, iface4, recursive1, recursive1.x, iface5, iface2fn1, iface2fn2, bencharr, benchparr, mapinf)
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}
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