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index: remove redundant storage of indexmap size

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This commit is contained in:
Michael Eischer 2023-05-29 00:13:32 +02:00
parent 12141afbad
commit f1c388c623
1 changed files with 5 additions and 6 deletions
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11
internal/index/indexmap.go
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@ -2,6 +2,7 @@ package index
import (
"hash/maphash"
"math"
"github.com/restic/restic/internal/restic"
)
@ -17,8 +18,7 @@ import (
// needs to be resized when the table grows, preventing memory usage spikes.
type indexMap struct {
// The number of buckets is always a power of two and never zero.
buckets []uint
numentries uint
buckets []uint
mh maphash.Hash
@ -34,9 +34,9 @@ const (
// using id as the key.
func (m *indexMap) add(id restic.ID, packIdx int, offset, length uint32, uncompressedLength uint32) {
switch {
case m.numentries == 0: // Lazy initialization.
case m.len() == math.MaxUint: // Lazy initialization.
m.init()
case m.numentries >= maxLoad*uint(len(m.buckets)):
case m.len() >= maxLoad*uint(len(m.buckets)):
m.grow()
}
@ -50,7 +50,6 @@ func (m *indexMap) add(id restic.ID, packIdx int, offset, length uint32, uncompr
e.uncompressedLength = uncompressedLength
m.buckets[h] = idx
m.numentries++
}
// foreach calls fn for all entries in the map, until fn returns false.
@ -138,7 +137,7 @@ func (m *indexMap) init() {
m.newEntry()
}
func (m *indexMap) len() uint { return m.numentries }
func (m *indexMap) len() uint { return m.blockList.Size() - 1 }
func (m *indexMap) newEntry() (*indexEntry, uint) {
return m.blockList.Alloc()