mirror of
https://github.com/octoleo/restic.git
synced 2024-11-16 18:15:20 +00:00
953f3d55ee
Load pack header length and 15 header entries with single backend request. This eliminates separate header Load() request for most pack files and significantly improves index.New() performance. Signed-off-by: Igor Fedorenko <igor@ifedorenko.com>
47 lines
1.2 KiB
Go
47 lines
1.2 KiB
Go
package pack
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/binary"
|
|
"io"
|
|
"testing"
|
|
|
|
"github.com/restic/restic/internal/crypto"
|
|
rtest "github.com/restic/restic/internal/test"
|
|
)
|
|
|
|
type countingReaderAt struct {
|
|
delegate io.ReaderAt
|
|
invocationCount int
|
|
}
|
|
|
|
func (rd *countingReaderAt) ReadAt(p []byte, off int64) (n int, err error) {
|
|
rd.invocationCount++
|
|
return rd.delegate.ReadAt(p, off)
|
|
}
|
|
|
|
func TestReadHeaderEagerLoad(t *testing.T) {
|
|
|
|
testReadHeader := func(entryCount uint, expectedReadInvocationCount int) {
|
|
expectedHeader := rtest.Random(0, int(entryCount*entrySize)+crypto.Extension)
|
|
|
|
buf := &bytes.Buffer{}
|
|
buf.Write(rtest.Random(0, 100)) // pack blobs data
|
|
buf.Write(expectedHeader) // pack header
|
|
binary.Write(buf, binary.LittleEndian, uint32(len(expectedHeader))) // pack header length
|
|
|
|
rd := &countingReaderAt{delegate: bytes.NewReader(buf.Bytes())}
|
|
|
|
header, err := readHeader(rd, int64(buf.Len()))
|
|
rtest.OK(t, err)
|
|
|
|
rtest.Equals(t, expectedHeader, header)
|
|
rtest.Equals(t, expectedReadInvocationCount, rd.invocationCount)
|
|
}
|
|
|
|
testReadHeader(1, 1)
|
|
testReadHeader(eagerEntries-1, 1)
|
|
testReadHeader(eagerEntries, 1)
|
|
testReadHeader(eagerEntries+1, 2)
|
|
}
|