Why is OOCalc so slow ???

[Brendan J Simon <BrendanSimon@fastmail.fm>]

I have an Excel spreadsheet which has a couple of sheets and two charts.
In Gnumeric it opens instantaneously, but in OpenOfficeCalc it takes 
almost a minute.  I can't believe how slow it is.

I thought it must have been the process of converting the Excel file 
fomrmat to an internal format that OOCalc uses.  That still may be the 
case but after trying Gnumeric I can definately say that there is no 
fundamental reason for it to be so slow in OOCalc.

Does anyone know if this a problem with the Debian builds (probably not) 
or an upstream problem (more likely) ???

Regards,
Brendan Simon.