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optimise pin update command #4348

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merged 3 commits into from
Oct 31, 2017
Merged

optimise pin update command #4348

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885de4f
optimise pin update command
ianopolous Oct 28, 2017
825add0
improve style
ianopolous Oct 28, 2017
4f11baa
add tests for basic name matching in pin update
ianopolous Oct 28, 2017
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25 changes: 16 additions & 9 deletions merkledag/utils/diffenum.go
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Original file line number Diff line number Diff line change
Expand Up @@ -65,27 +65,34 @@ type diffpair struct {
// getLinkDiff returns a changeset between nodes 'a' and 'b'. Currently does
// not log deletions as our usecase doesnt call for this.
func getLinkDiff(a, b node.Node) []diffpair {
have := make(map[string]*node.Link)
names := make(map[string]*node.Link)
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Looks right. The Name property of links is a protonode thing (that needs to die).

ina := make(map[string]*node.Link)
inb := make(map[string]*node.Link)
var aonly []*cid.Cid
for _, l := range b.Links() {
inb[l.Cid.KeyString()] = l
}
for _, l := range a.Links() {
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It will be faster to just call KeyString() once, bind it to a local variable here. (also easier on memory)

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done

have[l.Cid.KeyString()] = l
names[l.Name] = l
ina[l.Cid.KeyString()] = l
if inb[l.Cid.KeyString()] == nil {
aonly = append(aonly, l.Cid)
}
}

var out []diffpair
var aindex = 0
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you can just say var aindex int


for _, l := range b.Links() {
if have[l.Cid.KeyString()] != nil {
if ina[l.Cid.KeyString()] != nil {
continue
}

match, ok := names[l.Name]
if !ok {
if aindex < len(aonly) {
out = append(out, diffpair{bef: aonly[aindex], aft: l.Cid})
aindex++
} else {
out = append(out, diffpair{aft: l.Cid})
continue
}

out = append(out, diffpair{bef: match.Cid, aft: l.Cid})
}
return out
}