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把一些运算优化为位运算.

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huangsimin
2020-03-23 10:56:53 +08:00
parent b5576f18ef
commit ef6c52294b
8 changed files with 32 additions and 32 deletions
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8
tree/vbt/vbt.go
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@@ -443,9 +443,9 @@ func (tree *Tree) Put(key interface{}) {
for cur := tree.root; ; {
if cur.size > 8 {
factor := cur.size / 10 // or factor = 1
factor := cur.size >> 3 // or factor = 1
ls, rs := cur.children[0].size, cur.children[1].size
if rs >= ls*2+factor || ls >= rs*2+factor {
if rs >= (ls<<1)+factor || ls >= (rs<<1)+factor {
tree.fixSize(cur, ls, rs)
}
}
@@ -874,9 +874,9 @@ func (tree *Tree) fixSizeWithRemove(cur *Node) {
for cur != nil {
cur.size--
if cur.size > 8 {
factor := cur.size / 10 // or factor = 1
factor := cur.size >> 3 // or factor = 1
ls, rs := getChildrenSize(cur)
if rs >= ls*2+factor || ls >= rs*2+factor {
if rs >= (ls<<1)+factor || ls >= (rs<<1)+factor {
tree.fixSize(cur, ls, rs)
}
} else if cur.size == 3 {