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stackitem: access value of Array/Struct directly

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```
name      old time/op    new time/op    delta
ToJSON-8    50.3µs ±34%    47.8µs ± 9%     ~     (p=0.971 n=10+10)

name      old alloc/op   new alloc/op   delta
ToJSON-8     396kB ± 0%     396kB ± 0%   -0.10%  (p=0.000 n=6+10)

name      old allocs/op  new allocs/op  delta
ToJSON-8      34.0 ± 0%      18.0 ± 0%  -47.06%  (p=0.000 n=10+10)
```

Signed-off-by: Evgeniy Stratonikov <evgeniy@nspcc.ru>
This commit is contained in:
Evgeniy Stratonikov 2021-07-09 15:25:40 +03:00
parent dc0a17dd0e
commit c4eb7db8a5
1 changed files with 7 additions and 1 deletions
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8
pkg/vm/stackitem/json.go
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@ -68,8 +68,14 @@ func toJSON(data []byte, seen map[Item]sliceNoPointer, item Item) ([]byte, error
switch it := item.(type) { switch it := item.(type) {
case *Array, *Struct: case *Array, *Struct:
var items []Item
if a, ok := it.(*Array); ok {
items = a.value
} else {
items = it.(*Struct).value
}
data = append(data, '[') data = append(data, '[')
items := it.Value().([]Item)
for i, v := range items { for i, v := range items {
data, err = toJSON(data, seen, v) data, err = toJSON(data, seen, v)
if err != nil { if err != nil {