Evgenii Stratonikov
665e5807bc
For big objects with known size we can optimize allocation patterns
by providing size hint. As with any hint, it does not affect transformer
functionality: slices with capacity > MaxSize are never allocated.
```
goos: linux
goarch: amd64
pkg: git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/transformer
cpu: 11th Gen Intel(R) Core(TM) i5-1135G7 @ 2.40GHz
│ out │
│ sec/op │
Transformer/small/no_size_hint-8 65.44µ ± 3%
Transformer/small/no_size_hint,_with_buffer-8 64.24µ ± 5%
Transformer/small/with_size_hint,_with_buffer-8 58.70µ ± 5%
Transformer/big/no_size_hint-8 367.8m ± 3%
Transformer/big/no_size_hint,_with_buffer-8 562.7m ± 0%
Transformer/big/with_size_hint,_with_buffer-8 385.6m ± 7%
geomean 5.197m
│ out │
│ B/op │
Transformer/small/no_size_hint-8 13.40Ki ± 0%
Transformer/small/no_size_hint,_with_buffer-8 13.40Ki ± 0%
Transformer/small/with_size_hint,_with_buffer-8 13.39Ki ± 0%
Transformer/big/no_size_hint-8 288.0Mi ± 0%
Transformer/big/no_size_hint,_with_buffer-8 1.390Gi ± 0%
Transformer/big/with_size_hint,_with_buffer-8 288.0Mi ± 0%
geomean 2.533Mi
│ out │
│ allocs/op │
Transformer/small/no_size_hint-8 92.00 ± 0%
Transformer/small/no_size_hint,_with_buffer-8 92.00 ± 0%
Transformer/small/with_size_hint,_with_buffer-8 92.00 ± 0%
Transformer/big/no_size_hint-8 546.5 ± 0%
Transformer/big/no_size_hint,_with_buffer-8 607.5 ± 0%
Transformer/big/with_size_hint,_with_buffer-8 545.5 ± 0%
geomean 228.1
```
Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
58 lines
1.5 KiB
Go
58 lines
1.5 KiB
Go
package transformer
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import (
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"context"
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"crypto/rand"
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"testing"
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cidtest "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container/id/test"
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objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/version"
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"github.com/stretchr/testify/require"
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)
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func TestChannelTarget(t *testing.T) {
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const maxSize = 100
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ch := make(chan *objectSDK.Object, 10)
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tt := new(testTarget)
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ct := NewChannelTarget(ch)
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chTarget, _ := newPayloadSizeLimiter(maxSize, 0, func() ObjectWriter { return ct })
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testTarget, _ := newPayloadSizeLimiter(maxSize, 0, func() ObjectWriter { return tt })
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ver := version.Current()
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cnr := cidtest.ID()
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hdr := objectSDK.New()
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hdr.SetContainerID(cnr)
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hdr.SetType(objectSDK.TypeRegular)
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hdr.SetVersion(&ver)
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payload := make([]byte, maxSize*2+maxSize/2)
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_, _ = rand.Read(payload)
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ctx := context.Background()
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expectedIDs := writeObject(t, ctx, testTarget, hdr, payload)
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actualIDs := writeObject(t, ctx, chTarget, hdr, payload)
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_ = expectedIDs
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_ = actualIDs
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//require.Equal(t, expectedIDs, actualIDs)
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for i := range tt.objects {
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select {
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case obj := <-ch:
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// Because of the split ID objects can be different.
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// However, payload and attributes must be the same.
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require.Equal(t, tt.objects[i].Payload(), obj.Payload())
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require.Equal(t, tt.objects[i].Attributes(), obj.Attributes())
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default:
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require.FailNow(t, "received less parts than expected")
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}
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}
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select {
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case <-ch:
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require.FailNow(t, "received more parts than expected")
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default:
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}
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}
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