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author | Corey Hulen <corey@hulen.com> | 2015-07-23 11:21:54 -0800 |
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committer | Corey Hulen <corey@hulen.com> | 2015-07-23 11:21:54 -0800 |
commit | b813234f4cc38e72bb94556d3a4acdcde5071468 (patch) | |
tree | f9a0eb8f9596c91531c6997617b4dd66e05dd317 /Godeps/_workspace/src/github.com/lib/pq/bench_test.go | |
parent | 32e8dddd0cd8532e45f89290a154d5d7911c16dd (diff) | |
parent | 98751a4f65a656839dc3724e72e672b585cb18c9 (diff) | |
download | chat-b813234f4cc38e72bb94556d3a4acdcde5071468.tar.gz chat-b813234f4cc38e72bb94556d3a4acdcde5071468.tar.bz2 chat-b813234f4cc38e72bb94556d3a4acdcde5071468.zip |
Merge pull request #170 from mattermost/mm-1420
Fixes mm-1420 adding initial support for postgres
Diffstat (limited to 'Godeps/_workspace/src/github.com/lib/pq/bench_test.go')
-rw-r--r-- | Godeps/_workspace/src/github.com/lib/pq/bench_test.go | 435 |
1 files changed, 435 insertions, 0 deletions
diff --git a/Godeps/_workspace/src/github.com/lib/pq/bench_test.go b/Godeps/_workspace/src/github.com/lib/pq/bench_test.go new file mode 100644 index 000000000..e71f41d06 --- /dev/null +++ b/Godeps/_workspace/src/github.com/lib/pq/bench_test.go @@ -0,0 +1,435 @@ +// +build go1.1 + +package pq + +import ( + "bufio" + "bytes" + "database/sql" + "database/sql/driver" + "io" + "math/rand" + "net" + "runtime" + "strconv" + "strings" + "sync" + "testing" + "time" + + "github.com/lib/pq/oid" +) + +var ( + selectStringQuery = "SELECT '" + strings.Repeat("0123456789", 10) + "'" + selectSeriesQuery = "SELECT generate_series(1, 100)" +) + +func BenchmarkSelectString(b *testing.B) { + var result string + benchQuery(b, selectStringQuery, &result) +} + +func BenchmarkSelectSeries(b *testing.B) { + var result int + benchQuery(b, selectSeriesQuery, &result) +} + +func benchQuery(b *testing.B, query string, result interface{}) { + b.StopTimer() + db := openTestConn(b) + defer db.Close() + b.StartTimer() + + for i := 0; i < b.N; i++ { + benchQueryLoop(b, db, query, result) + } +} + +func benchQueryLoop(b *testing.B, db *sql.DB, query string, result interface{}) { + rows, err := db.Query(query) + if err != nil { + b.Fatal(err) + } + defer rows.Close() + for rows.Next() { + err = rows.Scan(result) + if err != nil { + b.Fatal("failed to scan", err) + } + } +} + +// reading from circularConn yields content[:prefixLen] once, followed by +// content[prefixLen:] over and over again. It never returns EOF. +type circularConn struct { + content string + prefixLen int + pos int + net.Conn // for all other net.Conn methods that will never be called +} + +func (r *circularConn) Read(b []byte) (n int, err error) { + n = copy(b, r.content[r.pos:]) + r.pos += n + if r.pos >= len(r.content) { + r.pos = r.prefixLen + } + return +} + +func (r *circularConn) Write(b []byte) (n int, err error) { return len(b), nil } + +func (r *circularConn) Close() error { return nil } + +func fakeConn(content string, prefixLen int) *conn { + c := &circularConn{content: content, prefixLen: prefixLen} + return &conn{buf: bufio.NewReader(c), c: c} +} + +// This benchmark is meant to be the same as BenchmarkSelectString, but takes +// out some of the factors this package can't control. The numbers are less noisy, +// but also the costs of network communication aren't accurately represented. +func BenchmarkMockSelectString(b *testing.B) { + b.StopTimer() + // taken from a recorded run of BenchmarkSelectString + // See: http://www.postgresql.org/docs/current/static/protocol-message-formats.html + const response = "1\x00\x00\x00\x04" + + "t\x00\x00\x00\x06\x00\x00" + + "T\x00\x00\x00!\x00\x01?column?\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\xc1\xff\xfe\xff\xff\xff\xff\x00\x00" + + "Z\x00\x00\x00\x05I" + + "2\x00\x00\x00\x04" + + "D\x00\x00\x00n\x00\x01\x00\x00\x00d0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789" + + "C\x00\x00\x00\rSELECT 1\x00" + + "Z\x00\x00\x00\x05I" + + "3\x00\x00\x00\x04" + + "Z\x00\x00\x00\x05I" + c := fakeConn(response, 0) + b.StartTimer() + + for i := 0; i < b.N; i++ { + benchMockQuery(b, c, selectStringQuery) + } +} + +var seriesRowData = func() string { + var buf bytes.Buffer + for i := 1; i <= 100; i++ { + digits := byte(2) + if i >= 100 { + digits = 3 + } else if i < 10 { + digits = 1 + } + buf.WriteString("D\x00\x00\x00") + buf.WriteByte(10 + digits) + buf.WriteString("\x00\x01\x00\x00\x00") + buf.WriteByte(digits) + buf.WriteString(strconv.Itoa(i)) + } + return buf.String() +}() + +func BenchmarkMockSelectSeries(b *testing.B) { + b.StopTimer() + var response = "1\x00\x00\x00\x04" + + "t\x00\x00\x00\x06\x00\x00" + + "T\x00\x00\x00!\x00\x01?column?\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\xc1\xff\xfe\xff\xff\xff\xff\x00\x00" + + "Z\x00\x00\x00\x05I" + + "2\x00\x00\x00\x04" + + seriesRowData + + "C\x00\x00\x00\x0fSELECT 100\x00" + + "Z\x00\x00\x00\x05I" + + "3\x00\x00\x00\x04" + + "Z\x00\x00\x00\x05I" + c := fakeConn(response, 0) + b.StartTimer() + + for i := 0; i < b.N; i++ { + benchMockQuery(b, c, selectSeriesQuery) + } +} + +func benchMockQuery(b *testing.B, c *conn, query string) { + stmt, err := c.Prepare(query) + if err != nil { + b.Fatal(err) + } + defer stmt.Close() + rows, err := stmt.Query(nil) + if err != nil { + b.Fatal(err) + } + defer rows.Close() + var dest [1]driver.Value + for { + if err := rows.Next(dest[:]); err != nil { + if err == io.EOF { + break + } + b.Fatal(err) + } + } +} + +func BenchmarkPreparedSelectString(b *testing.B) { + var result string + benchPreparedQuery(b, selectStringQuery, &result) +} + +func BenchmarkPreparedSelectSeries(b *testing.B) { + var result int + benchPreparedQuery(b, selectSeriesQuery, &result) +} + +func benchPreparedQuery(b *testing.B, query string, result interface{}) { + b.StopTimer() + db := openTestConn(b) + defer db.Close() + stmt, err := db.Prepare(query) + if err != nil { + b.Fatal(err) + } + defer stmt.Close() + b.StartTimer() + + for i := 0; i < b.N; i++ { + benchPreparedQueryLoop(b, db, stmt, result) + } +} + +func benchPreparedQueryLoop(b *testing.B, db *sql.DB, stmt *sql.Stmt, result interface{}) { + rows, err := stmt.Query() + if err != nil { + b.Fatal(err) + } + if !rows.Next() { + rows.Close() + b.Fatal("no rows") + } + defer rows.Close() + for rows.Next() { + err = rows.Scan(&result) + if err != nil { + b.Fatal("failed to scan") + } + } +} + +// See the comment for BenchmarkMockSelectString. +func BenchmarkMockPreparedSelectString(b *testing.B) { + b.StopTimer() + const parseResponse = "1\x00\x00\x00\x04" + + "t\x00\x00\x00\x06\x00\x00" + + "T\x00\x00\x00!\x00\x01?column?\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\xc1\xff\xfe\xff\xff\xff\xff\x00\x00" + + "Z\x00\x00\x00\x05I" + const responses = parseResponse + + "2\x00\x00\x00\x04" + + "D\x00\x00\x00n\x00\x01\x00\x00\x00d0123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789" + + "C\x00\x00\x00\rSELECT 1\x00" + + "Z\x00\x00\x00\x05I" + c := fakeConn(responses, len(parseResponse)) + + stmt, err := c.Prepare(selectStringQuery) + if err != nil { + b.Fatal(err) + } + b.StartTimer() + + for i := 0; i < b.N; i++ { + benchPreparedMockQuery(b, c, stmt) + } +} + +func BenchmarkMockPreparedSelectSeries(b *testing.B) { + b.StopTimer() + const parseResponse = "1\x00\x00\x00\x04" + + "t\x00\x00\x00\x06\x00\x00" + + "T\x00\x00\x00!\x00\x01?column?\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\xc1\xff\xfe\xff\xff\xff\xff\x00\x00" + + "Z\x00\x00\x00\x05I" + var responses = parseResponse + + "2\x00\x00\x00\x04" + + seriesRowData + + "C\x00\x00\x00\x0fSELECT 100\x00" + + "Z\x00\x00\x00\x05I" + c := fakeConn(responses, len(parseResponse)) + + stmt, err := c.Prepare(selectSeriesQuery) + if err != nil { + b.Fatal(err) + } + b.StartTimer() + + for i := 0; i < b.N; i++ { + benchPreparedMockQuery(b, c, stmt) + } +} + +func benchPreparedMockQuery(b *testing.B, c *conn, stmt driver.Stmt) { + rows, err := stmt.Query(nil) + if err != nil { + b.Fatal(err) + } + defer rows.Close() + var dest [1]driver.Value + for { + if err := rows.Next(dest[:]); err != nil { + if err == io.EOF { + break + } + b.Fatal(err) + } + } +} + +func BenchmarkEncodeInt64(b *testing.B) { + for i := 0; i < b.N; i++ { + encode(¶meterStatus{}, int64(1234), oid.T_int8) + } +} + +func BenchmarkEncodeFloat64(b *testing.B) { + for i := 0; i < b.N; i++ { + encode(¶meterStatus{}, 3.14159, oid.T_float8) + } +} + +var testByteString = []byte("abcdefghijklmnopqrstuvwxyz") + +func BenchmarkEncodeByteaHex(b *testing.B) { + for i := 0; i < b.N; i++ { + encode(¶meterStatus{serverVersion: 90000}, testByteString, oid.T_bytea) + } +} +func BenchmarkEncodeByteaEscape(b *testing.B) { + for i := 0; i < b.N; i++ { + encode(¶meterStatus{serverVersion: 84000}, testByteString, oid.T_bytea) + } +} + +func BenchmarkEncodeBool(b *testing.B) { + for i := 0; i < b.N; i++ { + encode(¶meterStatus{}, true, oid.T_bool) + } +} + +var testTimestamptz = time.Date(2001, time.January, 1, 0, 0, 0, 0, time.Local) + +func BenchmarkEncodeTimestamptz(b *testing.B) { + for i := 0; i < b.N; i++ { + encode(¶meterStatus{}, testTimestamptz, oid.T_timestamptz) + } +} + +var testIntBytes = []byte("1234") + +func BenchmarkDecodeInt64(b *testing.B) { + for i := 0; i < b.N; i++ { + decode(¶meterStatus{}, testIntBytes, oid.T_int8, formatText) + } +} + +var testFloatBytes = []byte("3.14159") + +func BenchmarkDecodeFloat64(b *testing.B) { + for i := 0; i < b.N; i++ { + decode(¶meterStatus{}, testFloatBytes, oid.T_float8, formatText) + } +} + +var testBoolBytes = []byte{'t'} + +func BenchmarkDecodeBool(b *testing.B) { + for i := 0; i < b.N; i++ { + decode(¶meterStatus{}, testBoolBytes, oid.T_bool, formatText) + } +} + +func TestDecodeBool(t *testing.T) { + db := openTestConn(t) + rows, err := db.Query("select true") + if err != nil { + t.Fatal(err) + } + rows.Close() +} + +var testTimestamptzBytes = []byte("2013-09-17 22:15:32.360754-07") + +func BenchmarkDecodeTimestamptz(b *testing.B) { + for i := 0; i < b.N; i++ { + decode(¶meterStatus{}, testTimestamptzBytes, oid.T_timestamptz, formatText) + } +} + +func BenchmarkDecodeTimestamptzMultiThread(b *testing.B) { + oldProcs := runtime.GOMAXPROCS(0) + defer runtime.GOMAXPROCS(oldProcs) + runtime.GOMAXPROCS(runtime.NumCPU()) + globalLocationCache = newLocationCache() + + f := func(wg *sync.WaitGroup, loops int) { + defer wg.Done() + for i := 0; i < loops; i++ { + decode(¶meterStatus{}, testTimestamptzBytes, oid.T_timestamptz, formatText) + } + } + + wg := &sync.WaitGroup{} + b.ResetTimer() + for j := 0; j < 10; j++ { + wg.Add(1) + go f(wg, b.N/10) + } + wg.Wait() +} + +func BenchmarkLocationCache(b *testing.B) { + globalLocationCache = newLocationCache() + for i := 0; i < b.N; i++ { + globalLocationCache.getLocation(rand.Intn(10000)) + } +} + +func BenchmarkLocationCacheMultiThread(b *testing.B) { + oldProcs := runtime.GOMAXPROCS(0) + defer runtime.GOMAXPROCS(oldProcs) + runtime.GOMAXPROCS(runtime.NumCPU()) + globalLocationCache = newLocationCache() + + f := func(wg *sync.WaitGroup, loops int) { + defer wg.Done() + for i := 0; i < loops; i++ { + globalLocationCache.getLocation(rand.Intn(10000)) + } + } + + wg := &sync.WaitGroup{} + b.ResetTimer() + for j := 0; j < 10; j++ { + wg.Add(1) + go f(wg, b.N/10) + } + wg.Wait() +} + +// Stress test the performance of parsing results from the wire. +func BenchmarkResultParsing(b *testing.B) { + b.StopTimer() + + db := openTestConn(b) + defer db.Close() + _, err := db.Exec("BEGIN") + if err != nil { + b.Fatal(err) + } + + b.StartTimer() + for i := 0; i < b.N; i++ { + res, err := db.Query("SELECT generate_series(1, 50000)") + if err != nil { + b.Fatal(err) + } + res.Close() + } +} |