WriteToBuffer function takes too long times

[xiaozhiliaoo]

Description

f := excelize.NewFile()
	sheet := "sheet1"
	_ = f.SetSheetName("Sheet1", sheet)
	for x, row := range rows {
		for y, cell := range row {
			cellName, err := excelize.CoordinatesToCellName(y+1, x+1)
			if err != nil {
				continue
			}
			if err := f.SetCellStr(sheet, cellName, cell); err != nil {
				continue
			}
		}
	}
	bs, err := f.WriteToBuffer()

4核8G的配置，文件差不多有16.3M，9000行左右， f.WriteToBuffer()耗时有30s左右，请问下有没有优化方法，让WriteToBuffer更快呢？

Steps to reproduce the issue:
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Describe the results you received:

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Output of go version:

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Excelize version or commit ID:

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Environment details (OS, Microsoft Excel™ version, physical, etc.):

[xuri]

Thanks for your issue. If you are reporting a new issue, make sure that we do not have any duplicates that already exist. This was duplicated with issues #20, #29, #364, #382, #406, #1100, #1106 and #1551, please using stream writer for generating a new worksheet with massive amounts of data. Here are some performance figures for your reference: Performance Figures, please try using the last version. I've closed this issue. If you have any questions, please let me know, and you can reopen this anytime.