Optimize time.

driver/driver.go

@@ -318,7 +318,7 @@ func (s stmt) QueryContext(ctx context.Context, args []driver.NamedValue) (drive
 			case sqlite3.ZeroBlob:
 				err = s.stmt.BindZeroBlob(id, int64(a))
 			case time.Time:
-				err = s.stmt.BindText(id, a.Format(time.RFC3339Nano))
+				err = s.stmt.BindTime(id, a, sqlite3.TimeFormatDefault)
 			case nil:
 				err = s.stmt.BindNull(id)
 			default:
@@ -389,10 +389,10 @@ func (r rows) Next(dest []driver.Value) error {
 			dest[i] = r.stmt.ColumnInt64(i)
 		case sqlite3.FLOAT:
 			dest[i] = r.stmt.ColumnFloat(i)
-		case sqlite3.TEXT:
-			dest[i] = maybeTime(r.stmt.ColumnText(i))
 		case sqlite3.BLOB:
 			dest[i] = r.stmt.ColumnRawBlob(i)
+		case sqlite3.TEXT:
+			dest[i] = stringOrTime(r.stmt.ColumnRawText(i))
 		case sqlite3.NULL:
 			if buf, ok := dest[i].([]byte); ok {
 				dest[i] = buf[0:0]

driver/time.go

@@ -9,23 +9,23 @@ import (
 // if it roundtrips back to the same string.
 // This way times can be persisted to, and recovered from, the database,
 // but if a string is needed, [database/sql] will recover the same string.
-func maybeTime(text string) driver.Value {
+func stringOrTime(text []byte) driver.Value {
 	// Weed out (some) values that can't possibly be
 	// [time.RFC3339Nano] timestamps.
 	if len(text) < len("2006-01-02T15:04:05Z") {
-		return text
+		return string(text)
 	}
 	if len(text) > len(time.RFC3339Nano) {
-		return text
+		return string(text)
 	}
 	if text[4] != '-' || text[10] != 'T' || text[16] != ':' {
-		return text
+		return string(text)
 	}
 
 	// Slow path.
-	date, err := time.Parse(time.RFC3339Nano, text)
-	if err == nil && date.Format(time.RFC3339Nano) == text {
+	date, err := time.Parse(time.RFC3339Nano, string(text))
+	if err == nil && date.Format(time.RFC3339Nano) == string(text) {
 		return date
 	}
-	return text
+	return string(text)
 }

driver/time_test.go

@@ -6,7 +6,7 @@ import (
 )
 
 // This checks that any string can be recovered as the same string.
-func Fuzz_maybeTime_1(f *testing.F) {
+func Fuzz_stringOrTime_1(f *testing.F) {
 	f.Add("")
 	f.Add(" ")
 	f.Add("SQLite")
@@ -22,7 +22,7 @@ func Fuzz_maybeTime_1(f *testing.F) {
 	f.Add("Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.")
 
 	f.Fuzz(func(t *testing.T, str string) {
-		value := maybeTime(str)
+		value := stringOrTime([]byte(str))
 
 		switch v := value.(type) {
 		case time.Time:
@@ -48,7 +48,7 @@ func Fuzz_maybeTime_1(f *testing.F) {
 
 // This checks that any [time.Time] can be recovered as a [time.Time],
 // with nanosecond accuracy, and preserving any timezone offset.
-func Fuzz_maybeTime_2(f *testing.F) {
+func Fuzz_stringOrTime_2(f *testing.F) {
 	f.Add(0, 0)
 	f.Add(0, 1)
 	f.Add(0, -1)
@@ -59,7 +59,7 @@ func Fuzz_maybeTime_2(f *testing.F) {
 	f.Add(-763421161058, 222_222_222) // twosday, year 22222BC
 
 	checkTime := func(t *testing.T, date time.Time) {
-		value := maybeTime(date.Format(time.RFC3339Nano))
+		value := stringOrTime([]byte(date.Format(time.RFC3339Nano)))
 
 		switch v := value.(type) {
 		case time.Time: