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labels: make InternStrings a no-op for stringlabels version 

The current implementation of `InternStrings` will only save memory
when the whole set of labels is identical to one already seen, and this
cannot happen in the one place it is called from in Prometheus,
remote-write, which already detects identical series.

Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
This commit is contained in:
Bryan Boreham 2024-01-29 18:54:54 +00:00
parent 501bc6419e
commit 14b4fbc2ff
1 changed files with 2 additions and 4 deletions
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6
model/labels/labels_stringlabels.go
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@ -450,14 +450,12 @@ func (ls Labels) DropMetricName() Labels {
return ls return ls
} }
// InternStrings calls intern on every string value inside ls, replacing them with what it returns. // InternStrings is a no-op because it would only save when the whole set of labels is identical.
func (ls *Labels) InternStrings(intern func(string) string) { func (ls *Labels) InternStrings(intern func(string) string) {
ls.data = intern(ls.data)
} }
// ReleaseStrings calls release on every string value inside ls. // ReleaseStrings is a no-op for the same reason as InternStrings.
func (ls Labels) ReleaseStrings(release func(string)) { func (ls Labels) ReleaseStrings(release func(string)) {
release(ls.data)
} }
// Labels returns the labels from the builder. // Labels returns the labels from the builder.