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Also, don't make a mergeSeriesSet if there is only one SeriesSet.

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This commit is contained in:
Tom Wilkie 2018-01-25 11:17:16 +00:00
parent 48e39068bd
commit 749781edf3
1 changed files with 4 additions and 0 deletions
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4
storage/fanout.go
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@ -303,6 +303,10 @@ type mergeSeriesSet struct {
// NewMergeSeriesSet returns a new series set that merges (deduplicates) // NewMergeSeriesSet returns a new series set that merges (deduplicates)
// series returned by the input series sets when iterating. // series returned by the input series sets when iterating.
func NewMergeSeriesSet(sets []SeriesSet) SeriesSet { func NewMergeSeriesSet(sets []SeriesSet) SeriesSet {
if len(sets) == 1 {
return sets[0]
}
// Sets need to be pre-advanced, so we can introspect the label of the // Sets need to be pre-advanced, so we can introspect the label of the
// series under the cursor. // series under the cursor.
var h seriesSetHeap var h seriesSetHeap