385 lines
8.6 KiB
Go
385 lines
8.6 KiB
Go
package tsm1
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import (
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"fmt"
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"math"
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"math/rand"
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"testing"
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"testing/quick"
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"github.com/google/go-cmp/cmp"
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)
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func TestIntegerBatchDecodeAll_NegativeUncompressed(t *testing.T) {
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exp := []int64{
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-2352281900722994752, 1438442655375607923, -4110452567888190110,
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-1221292455668011702, -1941700286034261841, -2836753127140407751,
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1432686216250034552, 3663244026151507025, -3068113732684750258,
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-1949953187327444488, 3713374280993588804, 3226153669854871355,
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-2093273755080502606, 1006087192578600616, -2272122301622271655,
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2533238229511593671, -4450454445568858273, 2647789901083530435,
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2761419461769776844, -1324397441074946198, -680758138988210958,
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94468846694902125, -2394093124890745254, -2682139311758778198,
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}
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enc := NewIntegerEncoder(256)
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for _, v := range exp {
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enc.Write(v)
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}
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b, err := enc.Bytes()
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if err != nil {
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t.Fatalf("expected error: %v", err)
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}
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if got := b[0] >> 4; intUncompressed != got {
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t.Fatalf("encoding type mismatch: exp uncompressed, got %v", got)
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}
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got, err := IntegerBatchDecodeAll(b, nil)
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if err != nil {
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t.Fatalf("unexpected decode error %q", err)
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}
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if !cmp.Equal(got, exp) {
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t.Fatalf("unexpected values: -got/+exp\n%s", cmp.Diff(got, exp))
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}
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}
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func TestIntegerBatchDecodeAll_AllNegative(t *testing.T) {
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enc := NewIntegerEncoder(3)
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exp := []int64{
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-10, -5, -1,
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}
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for _, v := range exp {
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enc.Write(v)
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}
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b, err := enc.Bytes()
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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if got := b[0] >> 4; intCompressedSimple != got {
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t.Fatalf("encoding type mismatch: exp uncompressed, got %v", got)
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}
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got, err := IntegerBatchDecodeAll(b, nil)
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if err != nil {
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t.Fatalf("unexpected decode error %q", err)
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}
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if !cmp.Equal(got, exp) {
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t.Fatalf("unexpected values: -got/+exp\n%s", cmp.Diff(got, exp))
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}
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}
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func TestIntegerBatchDecodeAll_CounterPacked(t *testing.T) {
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enc := NewIntegerEncoder(16)
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exp := []int64{
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1e15, 1e15 + 1, 1e15 + 2, 1e15 + 3, 1e15 + 4, 1e15 + 6,
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}
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for _, v := range exp {
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enc.Write(v)
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}
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b, err := enc.Bytes()
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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if b[0]>>4 != intCompressedSimple {
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t.Fatalf("unexpected encoding format: expected simple, got %v", b[0]>>4)
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}
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// Should use 1 header byte + 2, 8 byte words if delta-encoding is used based on
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// values sizes. Without delta-encoding, we'd get 49 bytes.
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if exp := 17; len(b) != exp {
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t.Fatalf("encoded length mismatch: got %v, exp %v", len(b), exp)
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}
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got, err := IntegerBatchDecodeAll(b, nil)
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if err != nil {
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t.Fatalf("unexpected decode error %q", err)
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}
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if !cmp.Equal(got, exp) {
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t.Fatalf("unexpected values: -got/+exp\n%s", cmp.Diff(got, exp))
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}
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}
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func TestIntegerBatchDecodeAll_CounterRLE(t *testing.T) {
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enc := NewIntegerEncoder(16)
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exp := []int64{
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1e15, 1e15 + 1, 1e15 + 2, 1e15 + 3, 1e15 + 4, 1e15 + 5,
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}
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for _, v := range exp {
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enc.Write(v)
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}
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b, err := enc.Bytes()
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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if b[0]>>4 != intCompressedRLE {
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t.Fatalf("unexpected encoding format: expected RLE, got %v", b[0]>>4)
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}
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// Should use 1 header byte, 8 byte first value, 1 var-byte for delta and 1 var-byte for
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// count of deltas in this particular RLE.
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if exp := 11; len(b) != exp {
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t.Fatalf("encoded length mismatch: got %v, exp %v", len(b), exp)
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}
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got, err := IntegerBatchDecodeAll(b, nil)
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if err != nil {
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t.Fatalf("unexpected decode error %q", err)
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}
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if !cmp.Equal(got, exp) {
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t.Fatalf("unexpected values: -got/+exp\n%s", cmp.Diff(got, exp))
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}
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}
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func TestIntegerBatchDecodeAll_Descending(t *testing.T) {
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enc := NewIntegerEncoder(16)
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exp := []int64{
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7094, 4472, 1850,
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}
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for _, v := range exp {
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enc.Write(v)
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}
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b, err := enc.Bytes()
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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if b[0]>>4 != intCompressedRLE {
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t.Fatalf("unexpected encoding format: expected simple, got %v", b[0]>>4)
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}
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// Should use 1 header byte, 8 byte first value, 1 var-byte for delta and 1 var-byte for
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// count of deltas in this particular RLE.
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if exp := 12; len(b) != exp {
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t.Fatalf("encoded length mismatch: got %v, exp %v", len(b), exp)
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}
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got, err := IntegerBatchDecodeAll(b, nil)
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if err != nil {
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t.Fatalf("unexpected decode error %q", err)
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}
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if !cmp.Equal(got, exp) {
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t.Fatalf("unexpected values: -got/+exp\n%s", cmp.Diff(got, exp))
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}
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}
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func TestIntegerBatchDecodeAll_Flat(t *testing.T) {
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enc := NewIntegerEncoder(16)
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exp := []int64{
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1, 1, 1, 1,
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}
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for _, v := range exp {
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enc.Write(v)
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}
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b, err := enc.Bytes()
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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if b[0]>>4 != intCompressedRLE {
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t.Fatalf("unexpected encoding format: expected simple, got %v", b[0]>>4)
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}
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// Should use 1 header byte, 8 byte first value, 1 var-byte for delta and 1 var-byte for
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// count of deltas in this particular RLE.
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if exp := 11; len(b) != exp {
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t.Fatalf("encoded length mismatch: got %v, exp %v", len(b), exp)
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}
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got, err := IntegerBatchDecodeAll(b, nil)
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if err != nil {
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t.Fatalf("unexpected decode error %q", err)
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}
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if !cmp.Equal(got, exp) {
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t.Fatalf("unexpected values: -got/+exp\n%s", cmp.Diff(got, exp))
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}
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}
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func TestIntegerBatchDecodeAll_MinMax(t *testing.T) {
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enc := NewIntegerEncoder(2)
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exp := []int64{
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math.MinInt64, math.MaxInt64,
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}
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for _, v := range exp {
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enc.Write(v)
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}
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b, err := enc.Bytes()
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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if b[0]>>4 != intUncompressed {
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t.Fatalf("unexpected encoding format: expected simple, got %v", b[0]>>4)
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}
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if exp := 17; len(b) != exp {
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t.Fatalf("encoded length mismatch: got %v, exp %v", len(b), exp)
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}
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got, err := IntegerBatchDecodeAll(b, nil)
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if err != nil {
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t.Fatalf("unexpected decode error %q", err)
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}
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if !cmp.Equal(got, exp) {
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t.Fatalf("unexpected values: -got/+exp\n%s", cmp.Diff(got, exp))
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}
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}
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func TestIntegerBatchDecodeAll_Quick(t *testing.T) {
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quick.Check(func(values []int64) bool {
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exp := values
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if values == nil {
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exp = []int64{} // is this really expected?
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}
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// Write values to encoder.
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enc := NewIntegerEncoder(1024)
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for _, v := range values {
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enc.Write(v)
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}
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// Retrieve encoded bytes from encoder.
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buf, err := enc.Bytes()
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if err != nil {
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t.Fatal(err)
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}
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// Read values out of decoder.
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got, err := IntegerBatchDecodeAll(buf, nil)
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if err != nil {
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t.Fatalf("unexpected decode error %q", err)
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}
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if !cmp.Equal(got, exp) {
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t.Fatalf("unexpected values: -got/+exp\n%s", cmp.Diff(got, exp))
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}
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return true
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}, nil)
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}
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func BenchmarkIntegerBatchDecodeAllUncompressed(b *testing.B) {
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benchmarks := []int{
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5,
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55,
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555,
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1000,
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}
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values := []int64{
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-2352281900722994752, 1438442655375607923, -4110452567888190110,
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-1221292455668011702, -1941700286034261841, -2836753127140407751,
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1432686216250034552, 3663244026151507025, -3068113732684750258,
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-1949953187327444488, 3713374280993588804, 3226153669854871355,
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-2093273755080502606, 1006087192578600616, -2272122301622271655,
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2533238229511593671, -4450454445568858273, 2647789901083530435,
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2761419461769776844, -1324397441074946198, -680758138988210958,
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94468846694902125, -2394093124890745254, -2682139311758778198,
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}
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for _, size := range benchmarks {
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rand.Seed(int64(size * 1e3))
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enc := NewIntegerEncoder(size)
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for i := 0; i < size; i++ {
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enc.Write(values[rand.Int()%len(values)])
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}
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bytes, _ := enc.Bytes()
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b.Run(fmt.Sprintf("%d", size), func(b *testing.B) {
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b.SetBytes(int64(len(bytes)))
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b.ReportAllocs()
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dst := make([]int64, size)
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for i := 0; i < b.N; i++ {
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dst, _ = IntegerBatchDecodeAll(bytes, dst)
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}
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})
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}
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}
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func BenchmarkIntegerBatchDecodeAllPackedSimple(b *testing.B) {
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benchmarks := []int{
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5,
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55,
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555,
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1000,
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}
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for _, size := range benchmarks {
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rand.Seed(int64(size * 1e3))
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enc := NewIntegerEncoder(size)
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for i := 0; i < size; i++ {
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// Small amount of randomness prevents RLE from being used
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enc.Write(int64(i) + int64(rand.Intn(10)))
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}
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bytes, _ := enc.Bytes()
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b.Run(fmt.Sprintf("%d", size), func(b *testing.B) {
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b.SetBytes(int64(len(bytes)))
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b.ReportAllocs()
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dst := make([]int64, size)
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for i := 0; i < b.N; i++ {
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IntegerBatchDecodeAll(bytes, dst)
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}
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})
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}
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}
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func BenchmarkIntegerBatchDecodeAllRLE(b *testing.B) {
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benchmarks := []struct {
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n int
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delta int64
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}{
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{5, 1},
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{55, 1},
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{555, 1},
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{1000, 1},
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{1000, 0},
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}
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for _, bm := range benchmarks {
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rand.Seed(int64(bm.n * 1e3))
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enc := NewIntegerEncoder(bm.n)
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acc := int64(0)
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for i := 0; i < bm.n; i++ {
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enc.Write(acc)
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acc += bm.delta
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}
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bytes, _ := enc.Bytes()
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b.Run(fmt.Sprintf("%d_delta_%d", bm.n, bm.delta), func(b *testing.B) {
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b.SetBytes(int64(len(bytes)))
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b.ReportAllocs()
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dst := make([]int64, bm.n)
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for i := 0; i < b.N; i++ {
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IntegerBatchDecodeAll(bytes, dst)
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}
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})
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}
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}
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