forked from TrueCloudLab/frostfs-sdk-go
[#19] transformer: Optimize payload hashers a bit
``` name old time/op new time/op delta Transformer/small-8 74.8µs ±11% 73.7µs ±15% ~ (p=0.529 n=10+10) Transformer/big-8 1.38s ±11% 1.36s ± 4% ~ (p=0.796 n=10+10) name old alloc/op new alloc/op delta Transformer/small-8 7.69kB ± 0% 7.67kB ± 0% -0.21% (p=0.000 n=10+10) Transformer/big-8 49.2kB ± 0% 49.0kB ± 0% -0.48% (p=0.004 n=10+10) name old allocs/op new allocs/op delta Transformer/small-8 102 ± 0% 101 ± 0% -0.98% (p=0.000 n=9+10) Transformer/big-8 620 ± 1% 609 ± 0% -1.66% (p=0.000 n=10+10) ``` Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>
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1 changed files with 7 additions and 11 deletions
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@ -21,7 +21,7 @@ type payloadSizeLimiter struct {
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current, parent *object.Object
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currentHashers, parentHashers []*payloadChecksumHasher
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currentHashers, parentHashers []payloadChecksumHasher
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previous []oid.ID
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@ -83,7 +83,7 @@ func (s *payloadSizeLimiter) initialize() {
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// initialize parent object once (after 1st object)
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if ln == 1 {
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s.parent = fromObject(s.current)
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s.parentHashers = s.currentHashers
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s.parentHashers = append(s.parentHashers[:0], s.currentHashers...)
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// return source attributes
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s.parent.SetAttributes(s.parAttrs...)
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@ -117,7 +117,7 @@ func fromObject(obj *object.Object) *object.Object {
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func (s *payloadSizeLimiter) initializeCurrent() {
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// create payload hashers
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s.writtenCurrent = 0
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s.currentHashers = payloadHashersForObject(s.WithoutHomomorphicHash)
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s.initPayloadHashers()
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// compose multi-writer from target and all payload hashers
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ws := make([]io.Writer, 0, 1+len(s.currentHashers)+len(s.parentHashers))
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@ -135,22 +135,18 @@ func (s *payloadSizeLimiter) initializeCurrent() {
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s.chunkWriter = io.MultiWriter(ws...)
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}
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func payloadHashersForObject(withoutHomomorphicHash bool) []*payloadChecksumHasher {
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hashers := make([]*payloadChecksumHasher, 0, 2)
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hashers = append(hashers, &payloadChecksumHasher{
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func (s *payloadSizeLimiter) initPayloadHashers() {
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s.currentHashers = append(s.currentHashers[:0], payloadChecksumHasher{
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hasher: sha256.New(),
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typ: checksum.SHA256,
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})
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if !withoutHomomorphicHash {
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hashers = append(hashers, &payloadChecksumHasher{
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if !s.WithoutHomomorphicHash {
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s.currentHashers = append(s.currentHashers, payloadChecksumHasher{
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hasher: tz.New(),
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typ: checksum.TZ,
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})
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}
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return hashers
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}
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func (s *payloadSizeLimiter) release(finalize bool) (*AccessIdentifiers, error) {
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