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only visit nodes in EnumerateChildrenAsync when asked #4885

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merged 1 commit into from
Mar 29, 2018
Merged

only visit nodes in EnumerateChildrenAsync when asked #4885

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16 changes: 8 additions & 8 deletions merkledag/merkledag.go
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Original file line number Diff line number Diff line change
Expand Up @@ -319,17 +319,17 @@ func EnumerateChildrenAsync(ctx context.Context, getLinks GetLinks, c *cid.Cid,
for i := 0; i < FetchGraphConcurrency; i++ {
go func() {
for ic := range feed {
links, err := getLinks(ctx, ic)
if err != nil {
errChan <- err
return
}

setlk.Lock()
unseen := visit(ic)
shouldVisit := visit(ic)
setlk.Unlock()

if unseen {
if shouldVisit {
links, err := getLinks(ctx, ic)
if err != nil {
errChan <- err
return
}

select {
case out <- links:
case <-fetchersCtx.Done():
Expand Down