Adding upstream version 0.10.5.

Signed-off-by: Daniel Baumann <daniel@debian.org>

benchmarks/slow_reader_test.go

@@ -0,0 +1,78 @@
+package benchmark
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"reflect"
+	"testing"
+
+	gojson "github.com/goccy/go-json"
+)
+
+// Benchmark decoding from a slow io.Reader that never fills the buffer completely
+func Benchmark_Decode_SlowReader_EncodingJson(b *testing.B) {
+	var expected LargePayload
+	if err := json.Unmarshal(LargeFixture, &expected); err != nil {
+		b.Fatal(err)
+	}
+	for _, chunkSize := range [5]int{16384, 4096, 1024, 256, 64} {
+		b.Run(fmt.Sprintf("chunksize %v", chunkSize), func(b *testing.B) {
+			b.ReportAllocs()
+			for i := 0; i < b.N; i++ {
+				index = 0
+				var got LargePayload
+				if err := json.NewDecoder(slowReader{chunkSize: chunkSize}).Decode(&got); err != nil {
+					b.Fatal(err)
+				}
+				if !reflect.DeepEqual(expected, got) {
+					b.Fatalf("failed to decode. expected:[%+v] but got:[%+v]", expected, got)
+				}
+			}
+		})
+	}
+}
+
+func Benchmark_Decode_SlowReader_GoJson(b *testing.B) {
+	var expected LargePayload
+	if err := json.Unmarshal(LargeFixture, &expected); err != nil {
+		b.Fatal(err)
+	}
+	for _, chunkSize := range []int{16384, 4096, 1024, 256, 64} {
+		b.Run(fmt.Sprintf("chunksize %v", chunkSize), func(b *testing.B) {
+			b.ReportAllocs()
+			for i := 0; i < b.N; i++ {
+				index = 0
+				var got LargePayload
+				if err := gojson.NewDecoder(slowReader{chunkSize: chunkSize}).Decode(&got); err != nil {
+					b.Fatal(err)
+				}
+				if !reflect.DeepEqual(expected, got) {
+					b.Fatalf("failed to decode. expected:[%+v] but got:[%+v]", expected, got)
+				}
+			}
+		})
+	}
+}
+
+type slowReader struct {
+	chunkSize int
+}
+
+var index int
+
+func (s slowReader) Read(p []byte) (n int, err error) {
+	smallBuf := make([]byte, Min(s.chunkSize, len(p)))
+	x := bytes.NewReader(LargeFixture)
+	n, err = x.ReadAt(smallBuf, int64(index))
+	index += n
+	copy(p, smallBuf)
+	return
+}
+
+func Min(x, y int) int {
+	if x < y {
+		return x
+	}
+	return y
+}