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Avoid unneccessary memory allocations

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This commit is contained in:
Holger Obermaier 2023-09-21 10:19:25 +02:00
parent a401e4cdd1
commit 7b5a4caf6a
1 changed files with 20 additions and 17 deletions
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37
sinks/httpSink.go
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@ -47,11 +47,18 @@ type HttpSinkConfig struct {
MaxRetries int `json:"max_retries,omitempty"`
}
type key_value_pair struct {
key string
value string
}
type HttpSink struct {
sink
client *http.Client
// influx line protocol encoder
encoder influx.Encoder
// List of tags and meta data tags which should be used as tags
extended_tag_list []key_value_pair
// Flush() runs in another goroutine and accesses the influx line protocol encoder,
// so this encoderLock has to protect the encoder
encoderLock sync.Mutex
@ -74,16 +81,12 @@ func (s *HttpSink) Write(m lp.CCMetric) error {
s.encoder.StartLine(m.Name())
// copy tags and meta data which should be used as tags
type key_value struct {
key string
value string
}
key_value_store := make([]key_value, 0)
s.extended_tag_list = s.extended_tag_list[:0]
for key, value := range m.Tags() {
key_value_store =
s.extended_tag_list =
append(
key_value_store,
key_value{
s.extended_tag_list,
key_value_pair{
key: key,
value: value,
},
@ -91,10 +94,10 @@ func (s *HttpSink) Write(m lp.CCMetric) error {
}
for _, key := range s.config.MetaAsTags {
if value, ok := m.GetMeta(key); ok {
key_value_store =
s.extended_tag_list =
append(
key_value_store,
key_value{
s.extended_tag_list,
key_value_pair{
key: key,
value: value,
},
@ -104,8 +107,8 @@ func (s *HttpSink) Write(m lp.CCMetric) error {
// Encode tags (they musts be in lexical order)
slices.SortFunc(
key_value_store,
func(a key_value, b key_value) int {
s.extended_tag_list,
func(a key_value_pair, b key_value_pair) int {
if a.key < b.key {
return -1
}
@ -115,10 +118,10 @@ func (s *HttpSink) Write(m lp.CCMetric) error {
return 0
},
)
for i := range key_value_store {
for i := range s.extended_tag_list {
s.encoder.AddTag(
key_value_store[i].key,
key_value_store[i].value,
s.extended_tag_list[i].key,
s.extended_tag_list[i].value,
)
}
@ -309,6 +312,6 @@ func NewHttpSink(name string, config json.RawMessage) (Sink, error) {
// Configure influx line protocol encoder
s.encoder.SetPrecision(influx.Nanosecond)
s.extended_tag_list = make([]key_value_pair, 0)
return s, nil
}