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Make Head.symbols map with size hint (#552)

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To reduce the number of times the map is resized

Signed-off-by: zhulongcheng <zhulongcheng.me@gmail.com>
This commit is contained in:
zhulongcheng 2019-03-20 16:43:07 +08:00 committed by Krasi Georgiev
parent 921da4dced
commit 62cfe4446f
1 changed files with 1 additions and 1 deletions
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2
head.go
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@ -954,7 +954,7 @@ func (h *Head) gc() {
h.postings.Delete(deleted)
// Rebuild symbols and label value indices from what is left in the postings terms.
symbols := make(map[string]struct{})
symbols := make(map[string]struct{}, len(h.symbols))
values := make(map[string]stringset, len(h.values))
if err := h.postings.Iter(func(t labels.Label, _ index.Postings) error {