use syscall.Gettimeofday to get current time

canal/canal.go

@@ -18,6 +18,7 @@ import (
 	"github.com/go-mysql-org/go-mysql/mysql"
 	"github.com/go-mysql-org/go-mysql/replication"
 	"github.com/go-mysql-org/go-mysql/schema"
+	"github.com/go-mysql-org/go-mysql/utils"
 	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/pkg/parser"
 	"github.com/siddontang/go-log/log"
@@ -231,7 +232,7 @@ func (c *Canal) run() error {
 		c.cancel()
 	}()
 
-	c.master.UpdateTimestamp(uint32(time.Now().Unix()))
+	c.master.UpdateTimestamp(uint32(utils.Now().Unix()))
 
 	if !c.dumped {
 		c.dumped = true
@@ -373,7 +374,7 @@ func (c *Canal) GetTable(db string, table string) (*schema.Table, error) {
 		// if DiscardNoMetaRowEvent is true, we just log this error
 		if c.cfg.DiscardNoMetaRowEvent {
 			c.tableLock.Lock()
-			c.errorTablesGetTime[key] = time.Now()
+			c.errorTablesGetTime[key] = utils.Now()
 			c.tableLock.Unlock()
 			// log error and return ErrMissingTableMeta
 			c.cfg.Logger.Errorf("canal get table meta err: %v", errors.Trace(err))

canal/config.go

@@ -14,6 +14,7 @@ import (
 
 	"github.com/go-mysql-org/go-mysql/client"
 	"github.com/go-mysql-org/go-mysql/mysql"
+	"github.com/go-mysql-org/go-mysql/utils"
 )
 
 type DumpConfig struct {
@@ -142,7 +143,7 @@ func NewDefaultConfig() *Config {
 	c.User = mysql.DEFAULT_USER
 	c.Password = mysql.DEFAULT_PASSWORD
 	c.Charset = mysql.DEFAULT_CHARSET
-	c.ServerID = uint32(rand.New(rand.NewSource(time.Now().Unix())).Intn(1000)) + 1001
+	c.ServerID = uint32(rand.New(rand.NewSource(utils.Now().Unix())).Intn(1000)) + 1001
 	c.Flavor = mysql.DEFAULT_FLAVOR
 
 	c.Dump.ExecutionPath = mysql.DEFAULT_DUMP_EXECUTION_PATH

canal/dump.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/go-mysql-org/go-mysql/mysql"
 	"github.com/go-mysql-org/go-mysql/schema"
+	"github.com/go-mysql-org/go-mysql/utils"
 	"github.com/pingcap/errors"
 	"github.com/shopspring/decimal"
 )
@@ -142,7 +143,7 @@ func (c *Canal) dump() error {
 		return errors.New("mysqldump does not exist")
 	}
 
-	c.master.UpdateTimestamp(uint32(time.Now().Unix()))
+	c.master.UpdateTimestamp(uint32(utils.Now().Unix()))
 
 	h := &dumpParseHandler{c: c}
 	// If users call StartFromGTID with empty position to start dumping with gtid,
@@ -167,7 +168,7 @@ func (c *Canal) dump() error {
 		h.pos = uint64(pos.Pos)
 	}
 
-	start := time.Now()
+	start := utils.Now()
 	c.cfg.Logger.Info("try dump MySQL and parse")
 	if err := c.dumper.DumpAndParse(h); err != nil {
 		return errors.Trace(err)

canal/sync.go

@@ -7,6 +7,7 @@ import (
 	"github.com/go-mysql-org/go-mysql/mysql"
 	"github.com/go-mysql-org/go-mysql/replication"
 	"github.com/go-mysql-org/go-mysql/schema"
+	"github.com/go-mysql-org/go-mysql/utils"
 	"github.com/pingcap/errors"
 	"github.com/pingcap/tidb/pkg/parser/ast"
 )
@@ -253,7 +254,7 @@ func (c *Canal) updateTable(header *replication.EventHeader, db, table string) (
 }
 func (c *Canal) updateReplicationDelay(ev *replication.BinlogEvent) {
 	var newDelay uint32
-	now := uint32(time.Now().Unix())
+	now := uint32(utils.Now().Unix())
 	if now >= ev.Header.Timestamp {
 		newDelay = now - ev.Header.Timestamp
 	}

client/pool.go

@@ -8,6 +8,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/go-mysql-org/go-mysql/utils"
 	"github.com/pingcap/errors"
 )
 
@@ -247,7 +248,7 @@ func (pool *Pool) putConnection(connection Connection) {
 }
 
 func (pool *Pool) nowTs() Timestamp {
-	return Timestamp(time.Now().Unix())
+	return Timestamp(utils.Now().Unix())
 }
 
 func (pool *Pool) getConnection(ctx context.Context) (Connection, error) {
@@ -553,7 +554,7 @@ func (pool *Pool) startNewConnections(count int) {
 }
 
 func (pool *Pool) ping(conn *Conn) error {
-	deadline := time.Now().Add(100 * time.Millisecond)
+	deadline := utils.Now().Add(100 * time.Millisecond)
 	_ = conn.SetDeadline(deadline)
 	err := conn.Ping()
 	if err != nil {

packet/conn.go

@@ -150,7 +150,7 @@ func (c *Conn) ReadPacketReuseMem(dst []byte) ([]byte, error) {
 // newCompressedPacketReader creates a new compressed packet reader.
 func (c *Conn) newCompressedPacketReader() (io.Reader, error) {
 	if c.readTimeout != 0 {
-		if err := c.SetReadDeadline(time.Now().Add(c.readTimeout)); err != nil {
+		if err := c.SetReadDeadline(utils.Now().Add(c.readTimeout)); err != nil {
 			return nil, err
 		}
 	}
@@ -200,7 +200,7 @@ func (c *Conn) copyN(dst io.Writer, n int64) (int64, error) {
 		// Call ReadAtLeast with the currentPacketReader as it may change on every iteration
 		// of this loop.
 		if c.readTimeout != 0 {
-			if err := c.SetReadDeadline(time.Now().Add(c.readTimeout)); err != nil {
+			if err := c.SetReadDeadline(utils.Now().Add(c.readTimeout)); err != nil {
 				return written, err
 			}
 		}
@@ -344,7 +344,7 @@ func (c *Conn) WritePacket(data []byte) error {
 
 func (c *Conn) writeWithTimeout(b []byte) (n int, err error) {
 	if c.writeTimeout != 0 {
-		if err := c.SetWriteDeadline(time.Now().Add(c.writeTimeout)); err != nil {
+		if err := c.SetWriteDeadline(utils.Now().Add(c.writeTimeout)); err != nil {
 			return n, err
 		}
 	}

replication/binlogsyncer.go

@@ -19,6 +19,7 @@ import (
 
 	"github.com/go-mysql-org/go-mysql/client"
 	. "github.com/go-mysql-org/go-mysql/mysql"
+	"github.com/go-mysql-org/go-mysql/utils"
 )
 
 var (
@@ -227,7 +228,7 @@ func (b *BinlogSyncer) close() {
 	b.cancel()
 
 	if b.c != nil {
-		err := b.c.SetReadDeadline(time.Now().Add(100 * time.Millisecond))
+		err := b.c.SetReadDeadline(utils.Now().Add(100 * time.Millisecond))
 		if err != nil {
 			b.cfg.Logger.Warnf(`could not set read deadline: %s`, err)
 		}
@@ -288,7 +289,7 @@ func (b *BinlogSyncer) registerSlave() error {
 
 	//set read timeout
 	if b.cfg.ReadTimeout > 0 {
-		_ = b.c.SetReadDeadline(time.Now().Add(b.cfg.ReadTimeout))
+		_ = b.c.SetReadDeadline(utils.Now().Add(b.cfg.ReadTimeout))
 	}
 
 	if b.cfg.RecvBufferSize > 0 {
@@ -791,7 +792,7 @@ func (b *BinlogSyncer) onStream(s *BinlogStreamer) {
 
 		//set read timeout
 		if b.cfg.ReadTimeout > 0 {
-			_ = b.c.SetReadDeadline(time.Now().Add(b.cfg.ReadTimeout))
+			_ = b.c.SetReadDeadline(utils.Now().Add(b.cfg.ReadTimeout))
 		}
 
 		// Reset retry count on successful packet receieve

replication/replication_test.go

@@ -17,6 +17,7 @@ import (
 	"github.com/go-mysql-org/go-mysql/client"
 	"github.com/go-mysql-org/go-mysql/mysql"
 	"github.com/go-mysql-org/go-mysql/test_util"
+	"github.com/go-mysql-org/go-mysql/utils"
 )
 
 var testOutputLogs = flag.Bool("out", false, "output binlog event")
@@ -335,7 +336,7 @@ func (t *testSyncerSuite) testPositionSync() {
 
 	// Test re-sync.
 	time.Sleep(100 * time.Millisecond)
-	_ = t.b.c.SetReadDeadline(time.Now().Add(time.Millisecond))
+	_ = t.b.c.SetReadDeadline(utils.Now().Add(time.Millisecond))
 	time.Sleep(100 * time.Millisecond)
 
 	t.testSync(s)

server/caching_sha2_cache_test.go

@@ -18,6 +18,7 @@ import (
 	"github.com/go-mysql-org/go-mysql/mysql"
 	"github.com/go-mysql-org/go-mysql/test_util"
 	"github.com/go-mysql-org/go-mysql/test_util/test_keys"
+	"github.com/go-mysql-org/go-mysql/utils"
 )
 
 var delay = 50
@@ -131,13 +132,13 @@ func (s *cacheTestSuite) runSelect() {
 
 func (s *cacheTestSuite) TestCache() {
 	// first connection
-	t1 := time.Now()
+	t1 := utils.Now()
 	var err error
 	s.db, err = sql.Open("mysql", fmt.Sprintf("%s:%s@tcp(%s)/%s?tls=%s", *testUser, *testPassword, s.serverAddr, *testDB, s.tlsPara))
 	require.NoError(s.T(), err)
 	s.db.SetMaxIdleConns(4)
 	s.runSelect()
-	t2 := time.Now()
+	t2 := utils.Now()
 
 	d1 := int(t2.Sub(t1).Nanoseconds() / 1e6)
 	//log.Debugf("first connection took %d milliseconds", d1)
@@ -149,12 +150,12 @@ func (s *cacheTestSuite) TestCache() {
 	}
 
 	// second connection
-	t3 := time.Now()
+	t3 := utils.Now()
 	s.db, err = sql.Open("mysql", fmt.Sprintf("%s:%s@tcp(%s)/%s?tls=%s", *testUser, *testPassword, s.serverAddr, *testDB, s.tlsPara))
 	require.NoError(s.T(), err)
 	s.db.SetMaxIdleConns(4)
 	s.runSelect()
-	t4 := time.Now()
+	t4 := utils.Now()
 
 	d2 := int(t4.Sub(t3).Nanoseconds() / 1e6)
 	//log.Debugf("second connection took %d milliseconds", d2)

server/ssl.go

@@ -8,7 +8,8 @@ import (
 	"crypto/x509/pkix"
 	"encoding/pem"
 	"math/big"
-	"time"
+
+	"github.com/go-mysql-org/go-mysql/utils"
 )
 
 // NewServerTLSConfig: generate TLS config for server side
@@ -75,8 +76,8 @@ func generateAndSignRSACerts(caPem, caKey []byte) ([]byte, []byte) {
 			StreetAddress: []string{"ADDRESS"},
 			PostalCode:    []string{"POSTAL_CODE"},
 		},
-		NotBefore:    time.Now(),
-		NotAfter:     time.Now().AddDate(10, 0, 0),
+		NotBefore:    utils.Now(),
+		NotAfter:     utils.Now().AddDate(10, 0, 0),
 		SubjectKeyId: []byte{1, 2, 3, 4, 6},
 		ExtKeyUsage:  []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth, x509.ExtKeyUsageServerAuth},
 		KeyUsage:     x509.KeyUsageDigitalSignature,
@@ -112,8 +113,8 @@ func generateCA() ([]byte, []byte) {
 			StreetAddress: []string{"ADDRESS"},
 			PostalCode:    []string{"POSTAL_CODE"},
 		},
-		NotBefore:             time.Now(),
-		NotAfter:              time.Now().AddDate(10, 0, 0),
+		NotBefore:             utils.Now(),
+		NotAfter:              utils.Now().AddDate(10, 0, 0),
 		IsCA:                  true,
 		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth, x509.ExtKeyUsageServerAuth},
 		KeyUsage:              x509.KeyUsageDigitalSignature | x509.KeyUsageCertSign | x509.KeyUsageKeyEncipherment,

utils/now.go

@@ -0,0 +1,7 @@
+//go:build !unix
+
+package utils
+
+import "time"
+
+var Now = time.Now

utils/now_unix.go

@@ -0,0 +1,19 @@
+//go:build unix
+
+package utils
+
+import (
+	"syscall"
+	"time"
+)
+
+// Now is a faster method to get current time
+func Now() time.Time {
+	var tv syscall.Timeval
+	if err := syscall.Gettimeofday(&tv); err != nil {
+		// If it failed at syscall, use time package instead
+		return time.Now()
+	}
+
+	return time.Unix(0, syscall.TimevalToNsec(tv))
+}

utils/now_unix_test.go

@@ -0,0 +1,41 @@
+//go:build unix
+
+package utils
+
+import (
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCustomTimeNow(t *testing.T) {
+	precision := time.Millisecond
+
+	for i := 0; i < 1000; i++ {
+		timestamp := time.Now()
+		customTimestamp := Now()
+
+		// two timestamp should within 1 percistion
+		assert.WithinDuration(t, timestamp, customTimestamp, precision, fmt.Sprintf("Loop: %d: customTimestamp should within %s. timestamp: %d, customTimestamp: %d", i, precision.String(), timestamp.UnixNano(), customTimestamp.UnixNano()))
+
+		time.Sleep(time.Nanosecond)
+	}
+}
+
+func BenchmarkGoTimeNow(t *testing.B) {
+	t.ResetTimer()
+	for n := 0; n < t.N; n++ {
+		_ = time.Now()
+	}
+	t.StopTimer()
+}
+
+func BenchmarkCustomTimeNow(t *testing.B) {
+	t.ResetTimer()
+	for n := 0; n < t.N; n++ {
+		_ = Now()
+	}
+	t.StopTimer()
+}