# 1701 Opening and Closing Tables in a Multi-Threaded Application with Many Tables Already Open Is Slow

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My application kicks off a thread which in turn kicks off other threads to process data in a DBISAM db, This all works fine.

My question is regarding performance,

When the threads are run from my application they take approx 5.5secs to run, If I create a seperate small application that only runs the threads they take 3.4seconds to run. My application is reasonably large but even if I have it running and the seperate app that runs the threads running it alwasy takes 3.4seconds, whereas it always takes 5.5 if run from my main application.

If before I run my thread I set database.connected := FALSE the threads are about 1 second faster, I cant however do this for my app as the reason I have the threads is so that my users can continue using the app whilst its processing changes.