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[#19] transformer: Do not reuse memory of sent objects

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Slower, but more correct.
```
name                 old time/op    new time/op    delta
Transformer/small-8    72.4µs ± 8%    74.8µs ±11%     ~     (p=0.278 n=9+10)
Transformer/big-8       1.31s ± 8%     1.38s ±11%   +5.50%  (p=0.035 n=10+10)

name                 old alloc/op   new alloc/op   delta
Transformer/small-8    7.39kB ± 0%    7.69kB ± 0%   +4.04%  (p=0.000 n=10+10)
Transformer/big-8      46.9kB ± 0%    49.2kB ± 0%   +4.87%  (p=0.000 n=10+10)

name                 old allocs/op  new allocs/op  delta
Transformer/small-8      94.6 ± 1%     102.0 ± 0%   +7.82%  (p=0.000 n=10+9)
Transformer/big-8         560 ± 0%       620 ± 1%  +10.66%  (p=0.000 n=10+10)
```

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
This commit is contained in:
Evgenii Stratonikov 2023-02-24 16:31:12 +03:00 • committed by Gitea
parent 611e20587b
commit e45647de3c
3 changed files with 56 additions and 61 deletions
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38
object/transformer/hasher.go Normal file
View file

@ -0,0 +1,38 @@
package transformer
import (
"crypto/sha256"
"hash"
"github.com/TrueCloudLab/frostfs-sdk-go/checksum"
objectSDK "github.com/TrueCloudLab/frostfs-sdk-go/object"
"github.com/TrueCloudLab/tzhash/tz"
)
type payloadChecksumHasher struct {
hasher hash.Hash
typ checksum.Type
}
func (h payloadChecksumHasher) writeChecksum(obj *objectSDK.Object) {
switch h.typ {
case checksum.SHA256:
csSHA := [sha256.Size]byte{}
h.hasher.Sum(csSHA[:0])
var cs checksum.Checksum
cs.SetSHA256(csSHA)
obj.SetPayloadChecksum(cs)
case checksum.TZ:
csTZ := [tz.Size]byte{}
h.hasher.Sum(csTZ[:0])
var cs checksum.Checksum
cs.SetTillichZemor(csTZ)
obj.SetPayloadHomomorphicHash(cs)
default:
panic("unreachable")
}
}