-
Notifications
You must be signed in to change notification settings - Fork 679
/
compactor_map_reusable_pairs.go
53 lines (48 loc) · 1.93 KB
/
compactor_map_reusable_pairs.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
// _ _
// __ _____ __ ___ ___ __ _| |_ ___
// \ \ /\ / / _ \/ _` \ \ / / |/ _` | __/ _ \
// \ V V / __/ (_| |\ V /| | (_| | || __/
// \_/\_/ \___|\__,_| \_/ |_|\__,_|\__\___|
//
// Copyright © 2016 - 2024 Weaviate B.V. All rights reserved.
//
// CONTACT: hello@weaviate.io
//
package lsmkv
// reusableMapPairs is not thread-safe and intended for usage from a single
// thread. The caller is resoponsible for initializing each element themselves,
// the Resize functions will only set the size. If the size is reduced, this
// will only truncate elements, but will not reset values.
type reusableMapPairs struct {
left []MapPair
right []MapPair
}
func newReusableMapPairs() *reusableMapPairs {
return &reusableMapPairs{}
}
func (rmp *reusableMapPairs) ResizeLeft(size int) {
if cap(rmp.left) >= size {
rmp.left = rmp.left[:size]
} else {
// The 25% overhead for the capacity was chosen because we saw a lot
// re-allocations during testing with just a few elements more than before.
// This is something that really depends on the user's usage pattern, but
// in the test scenarios based on the
// weaviate-chaos-engineering/apps/importer-no-vector-index test script a
// simple 25% overhead reduced the resizing needs to almost zero.
rmp.left = make([]MapPair, size, int(float64(size)*1.25))
}
}
func (rmp *reusableMapPairs) ResizeRight(size int) {
if cap(rmp.right) >= size {
rmp.right = rmp.right[:size]
} else {
// The 25% overhead for the capacity was chosen because we saw a lot
// re-allocations during testing with just a few elements more than before.
// This is something that really depends on the user's usage pattern, but
// in the test scenarios based on the
// weaviate-chaos-engineering/apps/importer-no-vector-index test script a
// simple 25% overhead reduced the resizing needs to almost zero.
rmp.right = make([]MapPair, size, int(float64(size)*1.25))
}
}