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internal/restic: Don't allocate in Tree.Insert

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name         old time/op    new time/op    delta
BuildTree-8    34.6µs ± 4%     7.0µs ± 3%  -79.68%  (p=0.000 n=18+19)

name         old alloc/op   new alloc/op   delta
BuildTree-8    34.0kB ± 0%     0.9kB ± 0%  -97.37%  (p=0.000 n=20+20)

name         old allocs/op  new allocs/op  delta
BuildTree-8       108 ± 0%         1 ± 0%  -99.07%  (p=0.000 n=20+20)
This commit is contained in:
greatroar
2021-09-26 17:18:42 +02:00
parent 78dac2fd48
commit c892c0bab9
6 changed files with 35 additions and 11 deletions
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5
internal/archiver/archiver.go
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@@ -550,12 +550,13 @@ func (arch *Archiver) statDir(dir string) (os.FileInfo, error) {
func (arch *Archiver) SaveTree(ctx context.Context, snPath string, atree *Tree, previous *restic.Tree) (*restic.Tree, error) {
debug.Log("%v (%v nodes), parent %v", snPath, len(atree.Nodes), previous)
tree := restic.NewTree()
nodeNames := atree.NodeNames()
tree := restic.NewTree(len(nodeNames))
futureNodes := make(map[string]FutureNode)
// iterate over the nodes of atree in lexicographic (=deterministic) order
for _, name := range atree.NodeNames() {
for _, name := range nodeNames {
subatree := atree.Nodes[name]
// test if context has been cancelled