getPrinterCapabilities slow

rbuser · June 2001

I create a report at run time.
I noticed that setting the units of the report is quit slow : it lasts about
2 seconds.

freport := tppReport.create (self);
freport.dataPipeLine := fpipeLine;
freport.units := utMillimeters; {<<< slow}

It seems that the function TppPrinterInfo.GetPrinterCapabilities takes a lot
of time when called for the first time.
Subsequent calls to that function are fast !

Is there an explanation for this behaviour ?

Regards
Herman Bernaerts

digitalmetaphors · June 2001

It is slower the first time, because RB must talk to the printer driver for
the first time. As much information that RB needs about the printer should
be cached, and hence it should lower the communications sent to the driver
for subsequent actions. Naturally, the speed at which this initial
communication with the printer driver is completed is also dependent on the
machine's speed.

Cheers,

Jim Bennett
Digital Metaphors

rbuser · June 2001

Can I put some code in the startup phase, to move that 'delay' to the
program initialization ?

digitalmetaphors · June 2001

There is an issue when first report in an application loads there was a
performance hit because some printer initialization logic was firing. On
systems with slow printer drivers this caused a noticeable delay in loading.
I'm sending a patch to you via email.

Cheers,

Jim Bennett
Digital Metaphors

rbuser · June 2001

Sorry,
I still see the same delay, with the patch.

Regards
Herman

getPrinterCapabilities slow

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