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lib/uint64set: optimize bucket16.add and bucket16.addMulti a bit

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This commit is contained in:
Aliaksandr Valialkin 2021-03-15 16:57:51 +02:00
parent fb935e6e2c
commit 43504ebd14
1 changed files with 10 additions and 8 deletions
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18
lib/uint64set/uint64set.go
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@ -835,19 +835,22 @@ func (b *bucket16) copyTo(dst *bucket16) {
}
func (b *bucket16) add(x uint16) bool {
if b.bits == nil {
bits := b.bits
if bits == nil {
return b.addToSmallPool(x)
}
wordNum, bitMask := getWordNumBitMask(x)
word := &b.bits[wordNum]
ok := *word&bitMask == 0
*word |= bitMask
ok := bits[wordNum]&bitMask == 0
if ok {
bits[wordNum] |= bitMask
}
return ok
}
func (b *bucket16) addMulti(a []uint64) int {
count := 0
if b.bits == nil {
bits := b.bits
if bits == nil {
// Slow path
for _, x := range a {
if b.add(uint16(x)) {
@ -858,11 +861,10 @@ func (b *bucket16) addMulti(a []uint64) int {
// Fast path
for _, x := range a {
wordNum, bitMask := getWordNumBitMask(uint16(x))
word := &b.bits[wordNum]
if *word&bitMask == 0 {
if bits[wordNum]&bitMask == 0 {
bits[wordNum] |= bitMask
count++
}
*word |= bitMask
}
}
return count