Use a faster deepcopy library

col.go

@@ -18,7 +18,7 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/mohae/deepcopy"
+	"github.com/tiendc/go-deepcopy"
 )
 
 // Define the default cell size and EMU unit of measurement.
@@ -533,7 +533,8 @@ func (f *File) SetColWidth(sheet, startCol, endCol string, width float64) error
 func flatCols(col xlsxCol, cols []xlsxCol, replacer func(fc, c xlsxCol) xlsxCol) []xlsxCol {
 	var fc []xlsxCol
 	for i := col.Min; i <= col.Max; i++ {
-		c := deepcopy.Copy(col).(xlsxCol)
+		var c xlsxCol
+		deepcopy.Copy(&c, col)
 		c.Min, c.Max = i, i
 		fc = append(fc, c)
 	}
@@ -551,7 +552,8 @@ func flatCols(col xlsxCol, cols []xlsxCol, replacer func(fc, c xlsxCol) xlsxCol)
 				fc[idx] = replacer(fc[idx], column)
 				continue
 			}
-			c := deepcopy.Copy(column).(xlsxCol)
+			var c xlsxCol
+			deepcopy.Copy(&c, column)
 			c.Min, c.Max = i, i
 			fc = append(fc, c)
 		}

go.mod

@@ -3,9 +3,9 @@ module github.com/xuri/excelize/v2
 go 1.18
 
 require (
-	github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826
 	github.com/richardlehane/mscfb v1.0.4
-	github.com/stretchr/testify v1.8.4
+	github.com/stretchr/testify v1.9.0
+	github.com/tiendc/go-deepcopy v1.1.0
 	github.com/xuri/efp v0.0.0-20240408161823-9ad904a10d6d
 	github.com/xuri/nfp v0.0.0-20240318013403-ab9948c2c4a7
 	golang.org/x/crypto v0.29.0

go.sum

@@ -1,16 +1,16 @@
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826 h1:RWengNIwukTxcDr9M+97sNutRR1RKhG96O6jWumTTnw=
-github.com/mohae/deepcopy v0.0.0-20170929034955-c48cc78d4826/go.mod h1:TaXosZuwdSHYgviHp1DAtfrULt5eUgsSMsZf+YrPgl8=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/richardlehane/mscfb v1.0.4 h1:WULscsljNPConisD5hR0+OyZjwK46Pfyr6mPu5ZawpM=
 github.com/richardlehane/mscfb v1.0.4/go.mod h1:YzVpcZg9czvAuhk9T+a3avCpcFPMUWm7gK3DypaEsUk=
 github.com/richardlehane/msoleps v1.0.1/go.mod h1:BWev5JBpU9Ko2WAgmZEuiz4/u3ZYTKbjLycmwiWUfWg=
 github.com/richardlehane/msoleps v1.0.4 h1:WuESlvhX3gH2IHcd8UqyCuFY5yiq/GR/yqaSM/9/g00=
 github.com/richardlehane/msoleps v1.0.4/go.mod h1:BWev5JBpU9Ko2WAgmZEuiz4/u3ZYTKbjLycmwiWUfWg=
-github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
-github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/tiendc/go-deepcopy v1.1.0 h1:rBHhm5vg7WYnGLwktbQouodWjBXDoStOL4S7v/K8S4A=
+github.com/tiendc/go-deepcopy v1.1.0/go.mod h1:toXoeQoUqXOOS/X4sKuiAoSk6elIdqc0pN7MTgOOo2I=
 github.com/xuri/efp v0.0.0-20240408161823-9ad904a10d6d h1:llb0neMWDQe87IzJLS4Ci7psK/lVsjIS2otl+1WyRyY=
 github.com/xuri/efp v0.0.0-20240408161823-9ad904a10d6d/go.mod h1:ybY/Jr0T0GTCnYjKqmdwxyxn2BQf2RcQIIvex5QldPI=
 github.com/xuri/nfp v0.0.0-20240318013403-ab9948c2c4a7 h1:hPVCafDV85blFTabnqKgNhDCkJX25eik94Si9cTER4A=

rows.go

@@ -20,7 +20,7 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/mohae/deepcopy"
+	"github.com/tiendc/go-deepcopy"
 )
 
 // duplicateHelperFunc defines functions to duplicate helper.
@@ -653,7 +653,7 @@ func (f *File) DuplicateRowTo(sheet string, row, row2 int) error {
 
 	for i, r := range ws.SheetData.Row {
 		if r.R == row {
-			rowCopy = deepcopy.Copy(ws.SheetData.Row[i]).(xlsxRow)
+			deepcopy.Copy(&rowCopy, ws.SheetData.Row[i])
 			ok = true
 			break
 		}
@@ -729,7 +729,8 @@ func (f *File) duplicateConditionalFormat(ws *xlsxWorksheet, sheet string, row,
 				}
 			}
 			if len(SQRef) > 0 {
-				cfCopy := deepcopy.Copy(*cf).(xlsxConditionalFormatting)
+				var cfCopy xlsxConditionalFormatting
+				deepcopy.Copy(&cfCopy, *cf)
 				cfCopy.SQRef = strings.Join(SQRef, " ")
 				cfs = append(cfs, &cfCopy)
 			}
@@ -759,7 +760,8 @@ func (f *File) duplicateDataValidations(ws *xlsxWorksheet, sheet string, row, ro
 				}
 			}
 			if len(SQRef) > 0 {
-				dvCopy := deepcopy.Copy(*dv).(xlsxDataValidation)
+				var dvCopy xlsxDataValidation
+				deepcopy.Copy(&dvCopy, *dv)
 				dvCopy.Sqref = strings.Join(SQRef, " ")
 				dvs = append(dvs, &dvCopy)
 			}

sheet.go

@@ -27,7 +27,7 @@ import (
 	"unicode/utf16"
 	"unicode/utf8"
 
-	"github.com/mohae/deepcopy"
+	"github.com/tiendc/go-deepcopy"
 )
 
 // NewSheet provides the function to create a new sheet by given a worksheet
@@ -124,7 +124,8 @@ func (f *File) mergeExpandedCols(ws *xlsxWorksheet) {
 				Width:        ws.Cols.Col[i-1].Width,
 			}, ws.Cols.Col[i]); i++ {
 		}
-		column := deepcopy.Copy(ws.Cols.Col[left]).(xlsxCol)
+		var column xlsxCol
+		deepcopy.Copy(&column, ws.Cols.Col[left])
 		if left < i-1 {
 			column.Max = ws.Cols.Col[i-1].Min
 		}
@@ -750,7 +751,8 @@ func (f *File) copySheet(from, to int) error {
 	if err != nil {
 		return err
 	}
-	worksheet := deepcopy.Copy(sheet).(*xlsxWorksheet)
+	worksheet := &xlsxWorksheet{}
+	deepcopy.Copy(worksheet, sheet)
 	toSheetID := strconv.Itoa(f.getSheetID(f.GetSheetName(to)))
 	sheetXMLPath := "xl/worksheets/sheet" + toSheetID + ".xml"
 	if len(worksheet.SheetViews.SheetView) > 0 {