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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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4
cmd/generic-handlers.go
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@@ -71,7 +71,7 @@ const (
// and must not set by clients
func containsReservedMetadata(header http.Header) bool {
for key := range header {
if strings.HasPrefix(strings.ToLower(key), ReservedMetadataPrefixLower) {
if stringsHasPrefixFold(key, ReservedMetadataPrefix) {
return true
}
}
@@ -87,7 +87,7 @@ func isHTTPHeaderSizeTooLarge(header http.Header) bool {
length := len(key) + len(header.Get(key))
size += length
for _, prefix := range userMetadataKeyPrefixes {
if strings.HasPrefix(strings.ToLower(key), prefix) {
if stringsHasPrefixFold(key, prefix) {
usersize += length
break
}