[flext] CPU usage problem

[Patrick Gampp]

Hi all,
I build two flext Pd external based on the same source code.

External1:
- built with Visual Studio 2012
- includes static flext lib built from recent flext code
- Computer CPU usage: 0% (DSP is off in PD)

External2:
- built with Visual Studio 2010
- includes static flext lib based on 3 or more years old flext code
- Computer CPU usage: 12% (DSP is off in PD)

It's surprising that ext.2 leads to increased CPU usage even though the 
m_signal function is not entered.

Can someone give a hint, what could cause the different CPU usages?

Cheers,
Patrick