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// _ _
// __ _____ __ ___ ___ __ _| |_ ___
// \ \ /\ / / _ \/ _` \ \ / / |/ _` | __/ _ \
// \ V V / __/ (_| |\ V /| | (_| | || __/
// \_/\_/ \___|\__,_| \_/ |_|\__,_|\__\___|
//
// Copyright © 2016 - 2024 Weaviate B.V. All rights reserved.
//
// CONTACT: [email protected]
//
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))
}
}
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