mirror of
https://source.quilibrium.com/quilibrium/ceremonyclient.git
synced 2024-11-14 04:05:17 +00:00
76 lines
1.5 KiB
Go
76 lines
1.5 KiB
Go
// Copyright 2018 The LevelDB-Go and Pebble Authors. All rights reserved. Use
|
|
// of this source code is governed by a BSD-style license that can be found in
|
|
// the LICENSE file.
|
|
|
|
package sstable
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"fmt"
|
|
"io"
|
|
"testing"
|
|
"time"
|
|
"unsafe"
|
|
|
|
"github.com/stretchr/testify/require"
|
|
"golang.org/x/exp/rand"
|
|
)
|
|
|
|
func TestGetBytes(t *testing.T) {
|
|
const size = (1 << 31) - 1
|
|
// No need to actually allocate a huge slice, which can cause OOM on small
|
|
// machines (like the GitHub CI runners).
|
|
block := make([]byte, 100)
|
|
data := getBytes(unsafe.Pointer(&block[0]), size)
|
|
require.EqualValues(t, size, len(data))
|
|
}
|
|
|
|
func TestDecodeVarint(t *testing.T) {
|
|
vals := []uint32{
|
|
0,
|
|
1,
|
|
1 << 7,
|
|
1 << 8,
|
|
1 << 14,
|
|
1 << 15,
|
|
1 << 20,
|
|
1 << 21,
|
|
1 << 28,
|
|
1 << 29,
|
|
1 << 31,
|
|
}
|
|
buf := make([]byte, 5)
|
|
for _, v := range vals {
|
|
binary.PutUvarint(buf, uint64(v))
|
|
u, _ := decodeVarint(unsafe.Pointer(&buf[0]))
|
|
if v != u {
|
|
fmt.Printf("%d %d\n", v, u)
|
|
}
|
|
}
|
|
}
|
|
|
|
func BenchmarkDecodeVarint(b *testing.B) {
|
|
rng := rand.New(rand.NewSource(uint64(time.Now().UnixNano())))
|
|
vals := make([]unsafe.Pointer, 10000)
|
|
for i := range vals {
|
|
buf := make([]byte, 5)
|
|
binary.PutUvarint(buf, uint64(rng.Uint32()))
|
|
vals[i] = unsafe.Pointer(&buf[0])
|
|
}
|
|
|
|
b.ResetTimer()
|
|
var ptr unsafe.Pointer
|
|
for i, n := 0, 0; i < b.N; i += n {
|
|
n = len(vals)
|
|
if n > b.N-i {
|
|
n = b.N - i
|
|
}
|
|
for j := 0; j < n; j++ {
|
|
_, ptr = decodeVarint(vals[j])
|
|
}
|
|
}
|
|
if testing.Verbose() {
|
|
fmt.Fprint(io.Discard, ptr)
|
|
}
|
|
}
|