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lib/uint64set: optimize bucket16.addMulti a bit

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This commit is contained in:
Aliaksandr Valialkin 2021-03-16 21:08:19 +02:00
parent aba955fa16
commit 35bb44d317
1 changed files with 15 additions and 11 deletions
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26
lib/uint64set/uint64set.go
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@ -854,23 +854,27 @@ func (b *bucket16) add(x uint16) bool {
func (b *bucket16) addMulti(a []uint64) int { func (b *bucket16) addMulti(a []uint64) int {
count := 0 count := 0
bits := b.bits if b.bits == nil {
if bits == nil {
// Slow path // Slow path
for _, x := range a { for i, x := range a {
if b.add(uint16(x)) { if b.add(uint16(x)) {
count++ count++
} }
} if b.bits != nil {
} else { a = a[i+1:]
// Fast path goto fastPath
for _, x := range a {
wordNum, bitMask := getWordNumBitMask(uint16(x))
if bits[wordNum]&bitMask == 0 {
bits[wordNum] |= bitMask
count++
} }
} }
return count
}
fastPath:
bits := b.bits
for _, x := range a {
wordNum, bitMask := getWordNumBitMask(uint16(x))
if bits[wordNum]&bitMask == 0 {
bits[wordNum] |= bitMask
count++
}
} }
return count return count
} }