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https://github.com/nspcc-dev/neo-go.git
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59fbc689e4
Adding an array multiple times leads to the fast update via `IncRC`. This hides the allocation that is there on the first addition. In this commit add another benchmark which measures Add/Remove together, to ensure that `switch` in `refCounter.Add` is entered. Benchmark results are meaningful, because `Add`/`Remove` have almost identical implementation. Signed-off-by: Evgeniy Stratonikov <evgeniy@nspcc.ru>
68 lines
1.3 KiB
Go
68 lines
1.3 KiB
Go
package vm
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import (
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"testing"
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"github.com/nspcc-dev/neo-go/pkg/vm/stackitem"
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"github.com/stretchr/testify/require"
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)
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func TestRefCounter_Add(t *testing.T) {
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r := newRefCounter()
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require.Equal(t, 0, int(*r))
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r.Add(stackitem.Null{})
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require.Equal(t, 1, int(*r))
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r.Add(stackitem.Null{})
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require.Equal(t, 2, int(*r)) // count scalar items twice
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arr := stackitem.NewArray([]stackitem.Item{stackitem.NewByteArray([]byte{1}), stackitem.NewBool(false)})
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r.Add(arr)
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require.Equal(t, 5, int(*r)) // array + 2 elements
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r.Add(arr)
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require.Equal(t, 6, int(*r)) // count only array
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r.Remove(arr)
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require.Equal(t, 5, int(*r))
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r.Remove(arr)
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require.Equal(t, 2, int(*r))
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m := stackitem.NewMap()
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m.Add(stackitem.NewByteArray([]byte("some")), stackitem.NewBool(false))
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r.Add(m)
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require.Equal(t, 5, int(*r)) // map + key + value
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r.Add(m)
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require.Equal(t, 6, int(*r)) // map only
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r.Remove(m)
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require.Equal(t, 5, int(*r))
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r.Remove(m)
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require.Equal(t, 2, int(*r))
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}
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func BenchmarkRefCounter_Add(b *testing.B) {
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a := stackitem.NewArray(nil)
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rc := newRefCounter()
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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rc.Add(a)
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}
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}
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func BenchmarkRefCounter_AddRemove(b *testing.B) {
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a := stackitem.NewArray([]stackitem.Item{})
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rc := newRefCounter()
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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rc.Add(a)
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rc.Remove(a)
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}
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}
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