stdaddr: Add benchmarks.

This adds benchmarks for decoding and generating the payment script for
each supported version 0 address type.

This is part of a series of commits to fully implement the stdaddr
package.

internal/staging/stdaddr/bench_test.go

@@ -0,0 +1,118 @@
+// Copyright (c) 2021 The Decred developers
+// Use of this source code is governed by an ISC
+// license that can be found in the LICENSE file.
+
+package stdaddr
+
+import (
+	"testing"
+
+	"github.com/decred/dcrd/chaincfg/v3"
+)
+
+// BenchmarkDecode benchmarks the performance of decoding various types of
+// addresses.
+func BenchmarkDecode(b *testing.B) {
+	mainNetParams := chaincfg.MainNetParams()
+
+	benches := []struct {
+		name   string // benchmark name
+		addr   string // address to decode
+		params AddressParams
+	}{{
+		name:   "v0 p2sh",
+		addr:   "DcuQKx8BES9wU7C6Q5VmLBjw436r27hayjS",
+		params: mainNetParams,
+	}, {
+		name:   "v0 p2pkh-ecdsa-secp256k1",
+		addr:   "DsUZxxoHJSty8DCfwfartwTYbuhmVct7tJu",
+		params: mainNetParams,
+	}, {
+		name:   "v0 p2pkh-ed25519",
+		addr:   "DeeUhrRoTp4DftsqddVW96yMGMW4sgQFYUE",
+		params: mainNetParams,
+	}, {
+		name:   "v0 p2pkh-schnorr-secp256k1",
+		addr:   "DSXcZv4oSRiEoWL2a9aD8sgfptRo1YEXNKj",
+		params: mainNetParams,
+	}, {
+		name:   "v0 p2pk-ecdsa-secp256k1",
+		addr:   "DkM3ZigNyiwHrsXRjkDQ8t8tW6uKGW9g61qEkG3bMqQPQWYEf5X3J",
+		params: mainNetParams,
+	}, {
+		name:   "v0 p2pk-ed25519",
+		addr:   "DkM5zR8tqWNAHngZQDTyAeqzabZxMKrkSbCFULDhmvySn3uHmm221",
+		params: mainNetParams,
+	}, {
+		name:   "v0 p2pk-schnorr-secp256k1",
+		addr:   "DkM7TD2qsne9DKo4uA2ZNt3XhejYVwT5mmQWtUXtjdPhRHXTSKxN4",
+		params: mainNetParams,
+	}}
+
+	for _, bench := range benches {
+		b.Run(bench.name, func(b *testing.B) {
+			b.ReportAllocs()
+			b.ResetTimer()
+			for i := 0; i < b.N; i++ {
+				_, err := DecodeAddress(bench.addr, bench.params)
+				if err != nil {
+					b.Fatalf("%q: unexpected error: %v", bench.name, err)
+				}
+			}
+		})
+	}
+}
+
+// BenchmarkPaymentScript benchmarks the performance of generating payment
+// scripts for various types of addresses.
+func BenchmarkPaymentScript(b *testing.B) {
+	mainNetParams := chaincfg.MainNetParams()
+
+	benches := []struct {
+		name   string // benchmark name
+		addr   string // address to decode
+		params AddressParams
+	}{{
+		name:   "v0 p2sh",
+		addr:   "DcuQKx8BES9wU7C6Q5VmLBjw436r27hayjS",
+		params: mainNetParams,
+	}, {
+		name:   "v0 p2pkh-ecdsa-secp256k1",
+		addr:   "DsUZxxoHJSty8DCfwfartwTYbuhmVct7tJu",
+		params: mainNetParams,
+	}, {
+		name:   "v0 p2pkh-ed25519",
+		addr:   "DeeUhrRoTp4DftsqddVW96yMGMW4sgQFYUE",
+		params: mainNetParams,
+	}, {
+		name:   "v0 p2pkh-schnorr-secp256k1",
+		addr:   "DSXcZv4oSRiEoWL2a9aD8sgfptRo1YEXNKj",
+		params: mainNetParams,
+	}, {
+		name:   "v0 p2pk-ecdsa-secp256k1",
+		addr:   "DkM3ZigNyiwHrsXRjkDQ8t8tW6uKGW9g61qEkG3bMqQPQWYEf5X3J",
+		params: mainNetParams,
+	}, {
+		name:   "v0 p2pk-ed25519",
+		addr:   "DkM5zR8tqWNAHngZQDTyAeqzabZxMKrkSbCFULDhmvySn3uHmm221",
+		params: mainNetParams,
+	}, {
+		name:   "v0 p2pk-schnorr-secp256k1",
+		addr:   "DkM7TD2qsne9DKo4uA2ZNt3XhejYVwT5mmQWtUXtjdPhRHXTSKxN4",
+		params: mainNetParams,
+	}}
+
+	for _, bench := range benches {
+		addr, err := DecodeAddress(bench.addr, bench.params)
+		if err != nil {
+			b.Fatalf("%q: unexpected error: %v", bench.name, err)
+		}
+		b.Run(bench.name, func(b *testing.B) {
+			b.ReportAllocs()
+			b.ResetTimer()
+			for i := 0; i < b.N; i++ {
+				_, _ = addr.PaymentScript()
+			}
+		})
+	}
+}