Why is the operation so slow?

[HomerWu]

hello，

I created a preciew control to preview the watermark and header&footer,after user changed the value,then update the doc,and my logic is as below:

1.remove old watemark
2.remove old header&footer (yes,user can change both the watermark para and header&footer para in the same form)
3.add header&footer
4.add watermark
5.invalidatepage

i found remove watermark/header&footer and add watermark/header&footer cost almost a minute(my document has only 58 pages).
do you have any suggestion to help me?
the attachmens are part of log file and our preview form.

[Sasha - Tracker Dev Team]

Hello HomerWu,

Well that's because you are doing it like that. Why can't you remove all of the watermarks/HaFs in one go and then add the needed watermarks and HaFs in another go - should be a couple of seconds.

Cheers,
Alex

[HomerWu]

Hello Sasha，

So how can i remove all of the watermarks/HaFs in one go and add the needed watermarks and HaFs in another go?i 'm now using the operations op.document.removeHeaderAndFooter、 op.document.removeWatermarks
、op.document.addHeaderAndFooter、 op.document.addWatermarks one by one

[Sasha - Tracker Dev Team]

Hello HomerWu,

Just remove them from all of the pages and add them to all of the pages - that's all.

Cheers,
Alex