Its been proven long ago that Hyperthreading slows down a delphi multi threaded app.. Any Server app I have on a hyperthreaded machine can go 10 times faster if I force it to use only 1 cpu from the task manager. something to do with Context switching in the app.. I don't know how this would be under the new dual cores.. that was P4 architecture.
On 11/5/07, Rohit Gupta <[EMAIL PROTECTED]> wrote: > > I know I wont be believed, I can scarcely believe it myself. Under some > circumstances the display update for delphi apps is very slow. the > difference in speed we are talking about is 3 seconds and 23 seconds. > > When it is slow, all delphi apps are slow. When it is fast, all delphi > apps are fast. > > The only correlation I have found is that when the screen update code is > running (painting 300 editboxes) if the load is balanced between the two > cpus, the apps run slow. If the load is on one side or the other, then the > apps are fast. While even one Delphi app is in memory, the speed remains > consistent. To switch, one must close all Delphi apps and wait a few > seconds before launching them again. > > Is someone brave enough to postulate a theory ? > > -- > *Rohit Gupta* > * B.E. Elec. M.E. Mem IEEE Associate IEE* > *Technical Manager* > *Computer Fanatics Limited* > ** > *Tel* +64 9 4892280 > *Fax* +64 9 4892290 > *Email [EMAIL PROTECTED] > *Web *www.cfl.co.nz > > ------------------------------ > This email and any attachments contain information, which is confidential > and may be subject to legal privilege and copyright. If you are not the > intended recipient, you must not use, distribute or copy this email or > attachments. If you have received this in error, please notify us > immediately by return email and then delete this email and any attachments. > > _______________________________________________ > NZ Borland Developers Group - Delphi mailing list > Post: delphi@delphi.org.nz > Admin: http://delphi.org.nz/mailman/listinfo/delphi > Unsubscribe: send an email to [EMAIL PROTECTED] with Subject: > unsubscribe > -- Kyley Harris Harris Software +64-21-671-821
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