From 0c8b6ca8c79239d3dc7b6351af0fc080c2ddc7c8 Mon Sep 17 00:00:00 2001
From: Martin Holst Swende <martin@swende.se>
Date: Tue, 7 Nov 2023 19:20:58 +0100
Subject: [PATCH] log: better benchmark

---
 log/logger_test.go | 117 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 117 insertions(+)

diff --git a/log/logger_test.go b/log/logger_test.go
index fca1f1680f..5caac705e7 100644
--- a/log/logger_test.go
+++ b/log/logger_test.go
@@ -2,10 +2,15 @@ package log
 
 import (
 	"bytes"
+	"fmt"
+	"io"
+	"math/big"
 	"os"
 	"strings"
 	"testing"
+	"time"
 
+	"github.com/holiman/uint256"
 	"golang.org/x/exp/slog"
 )
 
@@ -51,3 +56,115 @@ func BenchmarkTraceLogging(b *testing.B) {
 		Trace("a message", "v", i)
 	}
 }
+
+func BenchmarkGloggerTerminal(b *testing.B) {
+	glogHandler := NewGlogHandler(NewTerminalHandler(io.Discard, false))
+	glogHandler.Verbosity(LevelInfo)
+	l := NewLogger(glogHandler)
+
+	type custom struct {
+		A string
+		B int8
+	}
+	var (
+		bb     = make([]byte, 10)
+		tt     = time.Now()
+		bigint = big.NewInt(100)
+		nilbig *big.Int
+		err    = fmt.Errorf("Oh nooes it's crap")
+	)
+
+	b.ReportAllocs()
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		l.Info("This is a message",
+			"foo", int16(i),
+			"bytes", bb,
+			"bonk", "a string with text",
+			"time", tt,
+			"bigint", bigint,
+			"nilbig", nilbig,
+			"err", err)
+	}
+	b.StopTimer()
+}
+
+func TestLoggerOutput(t *testing.T) {
+	type custom struct {
+		A string
+		B int8
+	}
+	var (
+		customA   = custom{"Foo", 12}
+		customB   = custom{"Foo\nLinebreak", 122}
+		bb        = make([]byte, 10)
+		tt        = time.Time{}
+		bigint    = big.NewInt(100)
+		nilbig    *big.Int
+		err       = fmt.Errorf("Oh nooes it's crap")
+		lazy      = Lazy{Fn: func() interface{} { return "lazy value" }}
+		smallUint = uint256.NewInt(500_000)
+		bigUint   = &uint256.Int{0xff, 0xff, 0xff, 0xff}
+	)
+
+	out := new(bytes.Buffer)
+	glogHandler := NewGlogHandler(NewTerminalHandler(out, false))
+	glogHandler.Verbosity(LevelInfo)
+	NewLogger(glogHandler).Info("This is a message",
+		"foo", int16(123),
+		"bytes", bb,
+		"bonk", "a string with text",
+		"time", tt,
+		"bigint", bigint,
+		"nilbig", nilbig,
+		"err", err,
+		"struct", customA,
+		"struct", customB,
+		"ptrstruct", &customA,
+		"lazy", lazy,
+		"smalluint", smallUint,
+		"bigUint", bigUint)
+
+	have := out.String()
+	t.Logf("output %v", out.String())
+	want := `INFO [11-07|19:14:33.821] This is a message                       foo=123 bytes="[0 0 0 0 0 0 0 0 0 0]" bonk="a string with text" time=0001-01-01T00:00:00+0000 bigint=100 nilbig=<nil> err="Oh nooes it's crap" struct="{A:Foo B:12}" struct="{A:Foo\nLinebreak B:122}" ptrstruct="&{A:Foo B:12}" lazy="lazy value" smalluint=500,000 bigUint=1,600,660,942,523,603,594,864,898,306,482,794,244,293,965,082,972,225,630,372,095
+`
+	if !bytes.Equal([]byte(have)[25:], []byte(want)[25:]) {
+		t.Errorf("Error\nhave: %q\nwant: %q", have, want)
+	}
+
+}
+
+func BenchmarkAppendFormat(b *testing.B) {
+	var now = time.Now()
+
+	b.Run("fmt time.Format", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			fmt.Fprintf(io.Discard, "%s", now.Format(termTimeFormat))
+
+		}
+	})
+	b.Run("time.AppendFormat", func(b *testing.B) {
+		for i := 0; i < b.N; i++ {
+			now.AppendFormat(nil, termTimeFormat)
+		}
+	})
+	//var buf = new(bytes.Buffer)
+	//b.Run("time.Custom", func(b *testing.B) {
+	//	for i := 0; i < b.N; i++ {
+	//		writeTimeTermFormat(buf, now)
+	//		buf.Reset()
+	//	}
+	//})
+}
+
+//func TestTimeFormat(t *testing.T) {
+//	var now = time.Now()
+//	want := now.AppendFormat(nil, termTimeFormat)
+//	var b = new(bytes.Buffer)
+//	writeTimeTermFormat(b, now)
+//	have := b.Bytes()
+//	if !bytes.Equal(have, want) {
+//		t.Errorf("have != want\nhave: %q\nwant: %q\n", have, want)
+//	}
+//}