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Writing Excel in java takes hours to create.
Joined: Jan 24, 2005
Feb 21, 2013 03:30:44
I have a program that executes a sql and write the extract into
sheet, the resulset of sql fetched is about 400k and whole process is taking 3 to 4 hours.
Any suggestions how I can improve the time..?
Joined: Jan 28, 2003
Feb 21, 2013 05:06:57
The first thing is to figure out which step takes a long time so that you know whatever effort you put into optimizing gets applied to the correct place.
Joined: Mar 22, 2005
Feb 21, 2013 05:53:17
What does "400k" mean - 400000 rows? 400KB of data? Something else?
I agree with Steve that the first step is to figure what's taking up all that time - reading the data from the DB, or writing to an Excel file.
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Joined: Feb 21, 2013
Feb 22, 2013 11:48:21
which API are you using? POI/Jxl or any other?
You just need to know where to find it!!
It is sorta covered in the
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subject: Writing Excel in java takes hours to create.
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