mirror of https://github.com/octoleo/restic.git
75 lines
1.6 KiB
Go
75 lines
1.6 KiB
Go
package repository
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import (
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"math/rand"
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"sort"
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"testing"
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"github.com/restic/restic/internal/restic"
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rtest "github.com/restic/restic/internal/test"
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)
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type mapcache map[restic.Handle]bool
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func (c mapcache) Has(h restic.Handle) bool { return c[h] }
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func TestSortCachedPacksFirst(t *testing.T) {
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var (
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blobs, sorted [100]restic.PackedBlob
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cache = make(mapcache)
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r = rand.New(rand.NewSource(1261))
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)
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for i := 0; i < len(blobs); i++ {
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var id restic.ID
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r.Read(id[:])
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blobs[i] = restic.PackedBlob{PackID: id}
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if i%3 == 0 {
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h := restic.Handle{Name: id.String(), Type: restic.PackFile}
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cache[h] = true
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}
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}
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copy(sorted[:], blobs[:])
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sort.SliceStable(sorted[:], func(i, j int) bool {
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hi := restic.Handle{Type: restic.PackFile, Name: sorted[i].PackID.String()}
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hj := restic.Handle{Type: restic.PackFile, Name: sorted[j].PackID.String()}
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return cache.Has(hi) && !cache.Has(hj)
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})
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sortCachedPacksFirst(cache, blobs[:])
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rtest.Equals(t, sorted, blobs)
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}
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func BenchmarkSortCachedPacksFirst(b *testing.B) {
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const nblobs = 512 // Corresponds to a file of ca. 2GB.
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var (
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blobs [nblobs]restic.PackedBlob
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cache = make(mapcache)
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r = rand.New(rand.NewSource(1261))
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)
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for i := 0; i < nblobs; i++ {
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var id restic.ID
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r.Read(id[:])
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blobs[i] = restic.PackedBlob{PackID: id}
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if i%3 == 0 {
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h := restic.Handle{Name: id.String(), Type: restic.PackFile}
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cache[h] = true
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}
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}
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var cpy [nblobs]restic.PackedBlob
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b.ReportAllocs()
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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copy(cpy[:], blobs[:])
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sortCachedPacksFirst(cache, cpy[:])
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}
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}
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