Prad Nukala
cf0ccd2f6e
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62 lines
1.4 KiB
Go
62 lines
1.4 KiB
Go
package cid_test
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import (
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"math/rand"
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"testing"
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"code.sonr.org/go/cid"
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"github.com/multiformats/go-multihash"
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)
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// BenchmarkIdentityCheck benchmarks two ways of checking whether a CIDv1 has multihash.IDENTITY
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// code:
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// 1. Cid.Prefix(), and
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// 2. decoding the Cid.Hash().
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//
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// This benchmark illustrates that using Cid.Prefix is more efficient than multihash.Decode.
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// Users wishing to perform such a check should use Cid.Prefix.
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//
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// Consider that `Cid.Prefix` is already efficient enough and introducing a dedicated API for
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// performing this check will likely result in small gains.
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func BenchmarkIdentityCheck(b *testing.B) {
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rng := rand.New(rand.NewSource(1413))
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data := make([]byte, rng.Intn(100)+1024)
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if _, err := rng.Read(data); err != nil {
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b.Fatal(err)
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}
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mh, err := multihash.Sum(data, multihash.IDENTITY, -1)
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if err != nil {
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b.Fatal(err)
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}
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cv1 := cid.NewCidV1(cid.Raw, mh)
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b.SetBytes(int64(cv1.ByteLen()))
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b.ReportAllocs()
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b.ResetTimer()
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b.Run("Prefix", func(b *testing.B) {
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b.RunParallel(func(pb *testing.PB) {
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for pb.Next() {
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if cv1.Prefix().MhType != multihash.IDENTITY {
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b.Fatal("expected IDENTITY CID")
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}
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}
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})
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})
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b.Run("MultihashDecode", func(b *testing.B) {
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b.RunParallel(func(pb *testing.PB) {
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for pb.Next() {
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dmh, err := multihash.Decode(cv1.Hash())
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if err != nil {
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b.Fatal(err)
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}
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if dmh.Code != multihash.IDENTITY {
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b.Fatal("expected IDENTITY CID")
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}
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}
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})
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})
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}
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