VI time measured through the profile performanc​e

Hi all,
My app works not so fast as usual and I decided to measure time with the profile performance tool. But times in a report are much less then the real times. What is the matter?

Sorry for long silence. Here are my subVi's in attached files. They are parts of the big project and will not work by themselves. The subvi's work with one queue at the same time, but GetData.vi completes 100 while loops pretty faster than Dequeue&Graph.vi. It must be noticed that FastCorrection and Statistic connectors for Dequeue&Graph.vi were False during examination. When GetData.vi had stoped after 100 while loop cycles, Dequeue&Graph began to work faster, and I set this vi's to be executed in separated threads. But nothing have changed.
Screenshot is attached also. Waiting for you comments.
Attachments:
GetData.vi ‏46 KB
Profile.jpg ‏86 KB
Dequeue&Graph.vi ‏62 KB

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