mirror of
https://github.com/octoleo/restic.git
synced 2024-11-20 03:51:02 +00:00
df2c03a6a4
When looking up a blob in the master index, with several indexes present in the master index, a significant amount of time is spent generating errors for each failed lookup. However, these errors are often used to check if a blob is present, but the contents are not inspected making the overhead of the error not useful. Instead, change Index.Lookup (and Index.LookupSize) to instead return a boolean denoting if the blob was found instead of an error. Also change all the calls to these functions to handle the new function signature. benchmark old ns/op new ns/op delta BenchmarkMasterIndexLookupSingleIndex-6 820 897 +9.39% BenchmarkMasterIndexLookupMultipleIndex-6 12821 2001 -84.39% BenchmarkMasterIndexLookupSingleIndexUnknown-6 5378 492 -90.85% BenchmarkMasterIndexLookupMultipleIndexUnknown-6 17026 1649 -90.31% benchmark old allocs new allocs delta BenchmarkMasterIndexLookupSingleIndex-6 9 9 +0.00% BenchmarkMasterIndexLookupMultipleIndex-6 59 19 -67.80% BenchmarkMasterIndexLookupSingleIndexUnknown-6 22 6 -72.73% BenchmarkMasterIndexLookupMultipleIndexUnknown-6 72 16 -77.78% benchmark old bytes new bytes delta BenchmarkMasterIndexLookupSingleIndex-6 160 160 +0.00% BenchmarkMasterIndexLookupMultipleIndex-6 3200 240 -92.50% BenchmarkMasterIndexLookupSingleIndexUnknown-6 1232 48 -96.10% BenchmarkMasterIndexLookupMultipleIndexUnknown-6 4272 128 -97.00%
124 lines
2.8 KiB
Go
124 lines
2.8 KiB
Go
package repository_test
|
|
|
|
import (
|
|
"math/rand"
|
|
"testing"
|
|
|
|
"github.com/restic/restic/internal/repository"
|
|
"github.com/restic/restic/internal/restic"
|
|
rtest "github.com/restic/restic/internal/test"
|
|
)
|
|
|
|
func TestMasterIndexLookup(t *testing.T) {
|
|
idInIdx1 := restic.NewRandomID()
|
|
idInIdx2 := restic.NewRandomID()
|
|
|
|
blob1 := restic.PackedBlob{
|
|
PackID: restic.NewRandomID(),
|
|
Blob: restic.Blob{
|
|
Type: restic.DataBlob,
|
|
ID: idInIdx1,
|
|
Length: 10,
|
|
Offset: 0,
|
|
},
|
|
}
|
|
|
|
blob2 := restic.PackedBlob{
|
|
PackID: restic.NewRandomID(),
|
|
Blob: restic.Blob{
|
|
Type: restic.DataBlob,
|
|
ID: idInIdx2,
|
|
Length: 100,
|
|
Offset: 10,
|
|
},
|
|
}
|
|
|
|
idx1 := repository.NewIndex()
|
|
idx1.Store(blob1)
|
|
|
|
idx2 := repository.NewIndex()
|
|
idx2.Store(blob2)
|
|
|
|
mIdx := repository.NewMasterIndex()
|
|
mIdx.Insert(idx1)
|
|
mIdx.Insert(idx2)
|
|
|
|
blobs, found := mIdx.Lookup(idInIdx1, restic.DataBlob)
|
|
rtest.Assert(t, found, "Expected to find blob id %v from index 1", idInIdx1)
|
|
rtest.Equals(t, []restic.PackedBlob{blob1}, blobs)
|
|
|
|
blobs, found = mIdx.Lookup(idInIdx2, restic.DataBlob)
|
|
rtest.Assert(t, found, "Expected to find blob id %v from index 2", idInIdx2)
|
|
rtest.Equals(t, []restic.PackedBlob{blob2}, blobs)
|
|
|
|
blobs, found = mIdx.Lookup(restic.NewRandomID(), restic.DataBlob)
|
|
rtest.Assert(t, !found, "Expected to not find a blob when fetching with a random id")
|
|
rtest.Assert(t, blobs == nil, "Expected no blobs when fetching with a random id")
|
|
}
|
|
|
|
func BenchmarkMasterIndexLookupSingleIndex(b *testing.B) {
|
|
idx1, lookupID := createRandomIndex(rand.New(rand.NewSource(0)))
|
|
|
|
mIdx := repository.NewMasterIndex()
|
|
mIdx.Insert(idx1)
|
|
|
|
b.ResetTimer()
|
|
|
|
for i := 0; i < b.N; i++ {
|
|
mIdx.Lookup(lookupID, restic.DataBlob)
|
|
}
|
|
}
|
|
|
|
func BenchmarkMasterIndexLookupMultipleIndex(b *testing.B) {
|
|
rng := rand.New(rand.NewSource(0))
|
|
mIdx := repository.NewMasterIndex()
|
|
|
|
for i := 0; i < 5; i++ {
|
|
idx, _ := createRandomIndex(rand.New(rng))
|
|
mIdx.Insert(idx)
|
|
}
|
|
|
|
idx1, lookupID := createRandomIndex(rand.New(rng))
|
|
mIdx.Insert(idx1)
|
|
|
|
b.ResetTimer()
|
|
|
|
for i := 0; i < b.N; i++ {
|
|
mIdx.Lookup(lookupID, restic.DataBlob)
|
|
}
|
|
}
|
|
|
|
func BenchmarkMasterIndexLookupSingleIndexUnknown(b *testing.B) {
|
|
lookupID := restic.NewRandomID()
|
|
idx1, _ := createRandomIndex(rand.New(rand.NewSource(0)))
|
|
|
|
mIdx := repository.NewMasterIndex()
|
|
mIdx.Insert(idx1)
|
|
|
|
b.ResetTimer()
|
|
|
|
for i := 0; i < b.N; i++ {
|
|
mIdx.Lookup(lookupID, restic.DataBlob)
|
|
}
|
|
}
|
|
|
|
func BenchmarkMasterIndexLookupMultipleIndexUnknown(b *testing.B) {
|
|
rng := rand.New(rand.NewSource(0))
|
|
lookupID := restic.NewRandomID()
|
|
mIdx := repository.NewMasterIndex()
|
|
|
|
for i := 0; i < 5; i++ {
|
|
idx, _ := createRandomIndex(rand.New(rng))
|
|
mIdx.Insert(idx)
|
|
}
|
|
|
|
idx1, _ := createRandomIndex(rand.New(rng))
|
|
mIdx.Insert(idx1)
|
|
|
|
b.ResetTimer()
|
|
|
|
for i := 0; i < b.N; i++ {
|
|
mIdx.Lookup(lookupID, restic.DataBlob)
|
|
}
|
|
}
|