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July 4, 2023 10:58
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csvlib_benchmark
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package benchmark | |
import ( | |
"bytes" | |
"encoding/csv" | |
"testing" | |
"github.com/gocarina/gocsv" | |
"github.com/jszwec/csvutil" | |
"github.com/tiendc/go-csvlib" | |
"github.com/yunabe/easycsv" | |
) | |
// NOTE: This benchmark code is copied from the bench test of the project https://github.com/jszwec/csvutil | |
// Unmarshal bench: https://gist.github.com/jszwec/e8515e741190454fa3494bcd3e1f100f | |
// Marshal bench: https://gist.github.com/jszwec/31980321e1852ebb5615a44ccf374f17 | |
func BenchmarkUnmarshal(b *testing.B) { | |
type A struct { | |
A int `csv:"a" name:"a"` | |
B float64 `csv:"b" name:"b"` | |
C string `csv:"c" name:"c"` | |
D int64 `csv:"d" name:"d"` | |
E int8 `csv:"e" name:"e"` | |
F float32 `csv:"f" name:"f"` | |
G float32 `csv:"g" name:"g"` | |
H float32 `csv:"h" name:"h"` | |
I string `csv:"i" name:"i"` | |
J int `csv:"j" name:"j"` | |
} | |
fixture := []struct { | |
desc string | |
records int | |
}{ | |
{ | |
desc: "100 records", | |
records: 100, | |
}, | |
{ | |
desc: "1000 records", | |
records: 1000, | |
}, | |
{ | |
desc: "10000 records", | |
records: 10000, | |
}, | |
{ | |
desc: "100000 records", | |
records: 100000, | |
}, | |
} | |
tests := []struct { | |
desc string | |
fn func([]byte, *testing.B) | |
}{ | |
{ | |
desc: "csvlib.Unmarshal", | |
fn: func(data []byte, b *testing.B) { | |
var a []A | |
if _, err := csvlib.Unmarshal(data, &a); err != nil { | |
b.Error(err) | |
} | |
}, | |
}, | |
{ | |
desc: "csvutil.Unmarshal", | |
fn: func(data []byte, b *testing.B) { | |
var a []A | |
if err := csvutil.Unmarshal(data, &a); err != nil { | |
b.Error(err) | |
} | |
}, | |
}, | |
{ | |
desc: "gocsv.Unmarshal", | |
fn: func(data []byte, b *testing.B) { | |
var a []A | |
if err := gocsv.UnmarshalBytes(data, &a); err != nil { | |
b.Error(err) | |
} | |
}, | |
}, | |
{ | |
desc: "easycsv.ReadAll", | |
fn: func(data []byte, b *testing.B) { | |
r := easycsv.NewReader(bytes.NewReader(data)) | |
var a []A | |
if err := r.ReadAll(&a); err != nil { | |
b.Error(err) | |
} | |
}, | |
}, | |
} | |
for _, t := range tests { | |
b.Run(t.desc, func(b *testing.B) { | |
for _, f := range fixture { | |
b.Run(f.desc, func(b *testing.B) { | |
data := genData(f.records) | |
for i := 0; i < b.N; i++ { | |
t.fn(data, b) | |
} | |
}) | |
} | |
}) | |
} | |
} | |
func genData(records int) []byte { | |
header := []string{"a", "b", "c", "d", "e", "f", "g", "h", "i", "j"} | |
record := []string{"1", "2.5", "foo", "6", "7", "8", "9", "10", "bar", "10"} | |
var buf bytes.Buffer | |
w := csv.NewWriter(&buf) | |
w.Write(header) | |
for i := 0; i < records; i++ { | |
w.Write(record) | |
} | |
w.Flush() | |
if err := w.Error(); err != nil { | |
panic(err) | |
} | |
return buf.Bytes() | |
} | |
func BenchmarkMarshal(b *testing.B) { | |
type A struct { | |
A int `csv:"a"` | |
B float64 `csv:"b"` | |
C string `csv:"c"` | |
D int64 `csv:"d"` | |
E int8 `csv:"e"` | |
F float32 `csv:"f"` | |
G float32 `csv:"g"` | |
H float32 `csv:"h"` | |
I string `csv:"i"` | |
J int `csv:"j"` | |
} | |
fixture := []struct { | |
desc string | |
records int | |
}{ | |
{ | |
desc: "100 records", | |
records: 100, | |
}, | |
{ | |
desc: "1000 records", | |
records: 1000, | |
}, | |
{ | |
desc: "10000 records", | |
records: 10000, | |
}, | |
{ | |
desc: "100000 records", | |
records: 100000, | |
}, | |
} | |
tests := []struct { | |
desc string | |
fn func([]A, *testing.B) | |
}{ | |
{ | |
desc: "csvlib.Marshal", | |
fn: func(as []A, b *testing.B) { | |
if _, err := csvlib.Marshal(as); err != nil { | |
b.Error(err) | |
} | |
}, | |
}, | |
{ | |
desc: "csvutil.Marshal", | |
fn: func(as []A, b *testing.B) { | |
if _, err := csvutil.Marshal(as); err != nil { | |
b.Error(err) | |
} | |
}, | |
}, | |
{ | |
desc: "gocsv.Marshal", | |
fn: func(as []A, b *testing.B) { | |
var buf bytes.Buffer | |
if err := gocsv.Marshal(as, &buf); err != nil { | |
b.Error(err) | |
} | |
}, | |
}, | |
} | |
a := A{ | |
A: 1, | |
B: 3.14, | |
C: "string", | |
D: 1, | |
E: 1, | |
F: 3.13, | |
G: 3.14, | |
H: 3.14, | |
I: "string", | |
J: 10, | |
} | |
for _, t := range tests { | |
b.Run(t.desc, func(b *testing.B) { | |
for _, f := range fixture { | |
b.Run(f.desc, func(b *testing.B) { | |
as := make([]A, f.records) | |
for i := range as { | |
as[i] = a | |
} | |
for i := 0; i < b.N; i++ { | |
t.fn(as, b) | |
} | |
}) | |
} | |
}) | |
} | |
} |
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