mirror of https://github.com/certusone/vouch.git
77 lines
2.0 KiB
Go
77 lines
2.0 KiB
Go
// Copyright © 2020 Attestant Limited.
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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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package util_test
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import (
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"crypto/rand"
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"crypto/sha256"
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"sync"
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"testing"
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"github.com/attestantio/vouch/util"
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log "github.com/sirupsen/logrus"
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"github.com/stretchr/testify/require"
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)
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var input [][]byte
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const (
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benchmarkElements = 65536
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benchmarkElementSize = 32
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benchmarkHashRuns = 128
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)
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func init() {
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input = make([][]byte, benchmarkElements)
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for i := 0; i < benchmarkElements; i++ {
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input[i] = make([]byte, benchmarkElementSize)
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_, err := rand.Read(input[i])
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if err != nil {
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log.WithError(err).Debug("Cannot read from rand")
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}
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}
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}
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// hash is a simple worker function that carries out repeated hashging of its input to provide an output.
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func hash(input [][]byte) [][]byte {
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output := make([][]byte, len(input))
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for i := range input {
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copy(output, input)
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for j := 0; j < benchmarkHashRuns; j++ {
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hash := sha256.Sum256(output[i])
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output[i] = hash[:]
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}
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}
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return output
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}
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func BenchmarkHash(b *testing.B) {
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for i := 0; i < b.N; i++ {
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hash(input)
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}
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}
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func BenchmarkHashMP(b *testing.B) {
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output := make([][]byte, len(input))
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for i := 0; i < b.N; i++ {
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workerResults, err := util.Scatter(len(input), func(offset int, entries int, _ *sync.RWMutex) (interface{}, error) {
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return hash(input[offset : offset+entries]), nil
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})
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require.NoError(b, err)
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for _, result := range workerResults {
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copy(output[result.Offset:], result.Extent.([][]byte))
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}
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}
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}
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