forked from github/multus-cni
ac21a96804
gomodule is still in progress to migrate for now, hence multus team decide to keep vendor directory to support build without gomodule.
77 lines
1.9 KiB
Go
77 lines
1.9 KiB
Go
// Copyright 2014 Google Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// +build ignore
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// This binary compares memory usage between btree and gollrb.
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package main
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import (
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"flag"
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"fmt"
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"math/rand"
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"runtime"
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"time"
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"github.com/google/btree"
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"github.com/petar/GoLLRB/llrb"
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)
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var (
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size = flag.Int("size", 1000000, "size of the tree to build")
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degree = flag.Int("degree", 8, "degree of btree")
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gollrb = flag.Bool("llrb", false, "use llrb instead of btree")
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)
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func main() {
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flag.Parse()
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vals := rand.Perm(*size)
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var t, v interface{}
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v = vals
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var stats runtime.MemStats
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for i := 0; i < 10; i++ {
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runtime.GC()
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}
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fmt.Println("-------- BEFORE ----------")
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runtime.ReadMemStats(&stats)
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fmt.Printf("%+v\n", stats)
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start := time.Now()
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if *gollrb {
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tr := llrb.New()
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for _, v := range vals {
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tr.ReplaceOrInsert(llrb.Int(v))
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}
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t = tr // keep it around
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} else {
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tr := btree.New(*degree)
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for _, v := range vals {
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tr.ReplaceOrInsert(btree.Int(v))
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}
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t = tr // keep it around
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}
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fmt.Printf("%v inserts in %v\n", *size, time.Since(start))
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fmt.Println("-------- AFTER ----------")
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runtime.ReadMemStats(&stats)
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fmt.Printf("%+v\n", stats)
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for i := 0; i < 10; i++ {
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runtime.GC()
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}
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fmt.Println("-------- AFTER GC ----------")
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runtime.ReadMemStats(&stats)
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fmt.Printf("%+v\n", stats)
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if t == v {
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fmt.Println("to make sure vals and tree aren't GC'd")
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}
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}
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