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Reduce allocations (#17584)

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* Reduce allocations

* Add stringsHasPrefixFold which can compare string prefixes, while ignoring case and not allocating.
* Reuse all msgp.Readers
* Reuse metadata buffers when not reading data.

* Make type safe. Make buffer 4K instead of 8.

* Unslice
This commit is contained in:
Klaus Post
2023-07-06 16:02:08 -07:00
committed by GitHub
parent 1bf23374a3
commit ff5988f4e0
21 changed files with 67 additions and 36 deletions
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8
cmd/bucket-replication.go
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@@ -679,7 +679,7 @@ func replicateDeleteToTarget(ctx context.Context, dobj DeletedObjectReplicationI
func getCopyObjMetadata(oi ObjectInfo, sc string) map[string]string {
meta := make(map[string]string, len(oi.UserDefined))
for k, v := range oi.UserDefined {
if strings.HasPrefix(strings.ToLower(k), ReservedMetadataPrefixLower) {
if stringsHasPrefixFold(k, ReservedMetadataPrefixLower) {
continue
}
@@ -744,7 +744,7 @@ func (m caseInsensitiveMap) Lookup(key string) (string, bool) {
func putReplicationOpts(ctx context.Context, sc string, objInfo ObjectInfo) (putOpts minio.PutObjectOptions, err error) {
meta := make(map[string]string)
for k, v := range objInfo.UserDefined {
if strings.HasPrefix(strings.ToLower(k), ReservedMetadataPrefixLower) {
if stringsHasPrefixFold(k, ReservedMetadataPrefixLower) {
continue
}
if isStandardHeader(k) {
@@ -909,7 +909,7 @@ func getReplicationAction(oi1 ObjectInfo, oi2 minio.ObjectInfo, opType replicati
for k, v := range oi1.UserDefined {
var found bool
for _, prefix := range compareKeys {
if !strings.HasPrefix(strings.ToLower(k), strings.ToLower(prefix)) {
if !stringsHasPrefixFold(k, prefix) {
continue
}
found = true
@@ -924,7 +924,7 @@ func getReplicationAction(oi1 ObjectInfo, oi2 minio.ObjectInfo, opType replicati
for k, v := range oi2.Metadata {
var found bool
for _, prefix := range compareKeys {
if !strings.HasPrefix(strings.ToLower(k), strings.ToLower(prefix)) {
if !stringsHasPrefixFold(k, prefix) {
continue
}
found = true