Thanks Tomasz, but I'm as sure as I can be it's not my formula's... I have checked them before, but I checked again on live charts as you suggested... my slowest formula is about 0.05sec and that uses about three plotforeign() statements.
I have found that symbol linking of charts seems to cause them to slow down... Would that be correct...? And when I say 'slow down' I don't mean chart re-draws... more general operation, like scrolling on charts, cursor clicks, menu pop up & right click menus etc... --- In [email protected], "Tomasz Janeczko" <[EMAIL PROTECTED]> wrote: > > Hello, > > Chart refresh of ZERO means to refresh as often as CPU allows > so it inherently leads to higher load. That is not degradation however but > rather speed up as chart are refreshed more often. > > However if on single core you are getting more than 70% CPU load average > it may mean that your formulas are probably not fine-tuned for real-time performance. > > EVERY formula used for real time trading should execute below 0.1 second. > > You should display the timing of your chart > (Tools->Preferences->Miscellaneous "Display chart timing). > If your formula execution takes ANYTHING more than 0.1 sec to execute > it means that the formula you are using is written wrong > (inefficiently). > Formulas shipped with AB execute in less than 0.01 sec. > > Run > AFL Editor, Tools->Check and profile to find bottleneck of your formulas. > > > Best regards, > Tomasz Janeczko > amibroker.com > ----- Original Message ----- > From: "sidhartha70" <[EMAIL PROTECTED]> > To: <[email protected]> > Sent: Tuesday, June 10, 2008 1:18 AM > Subject: [amibroker] Re: Tracking down performance degredation in AB > > > > Already using 5.10 Tomasz. > > > > --- In [email protected], "Tomasz Janeczko" <groups@> wrote: > >> > >> Which version are you using? > >> You should upgrade to 5.10 for best results. > >> > >> Best regards, > >> Tomasz Janeczko > >> amibroker.com > >> ----- Original Message ----- > >> From: "sidhartha70" <sidhartha70@> > >> To: <[email protected]> > >> Sent: Monday, June 09, 2008 9:29 PM > >> Subject: [amibroker] Re: Tracking down performance degredation in AB > >> > >> > >> > Actually, I think I just tracked it down... seems obvious now. I > >> > recently changed the 'Intraday" refresh interval in Preferences from 3 > >> > secs to zero... > >> > > >> > However, I only have about 4 symbols feeding live from IQ Feed... and > >> > I'm running a beast of a PC... and the fasted internet connection > >> > available in the UK... the net effect on my processor useage seems > >> > negligable... so I'm kinda surprised that it would degrade performance > >> > so much... > >> > > >> > Anyone else experienced this...? Should I be suprised or maybe there > >> > is something else amiss...?? > >> > > >> > Many Thanks > >> > > >> > --- In [email protected], "sidhartha70" <sidhartha70@> wrote: > >> >> > >> >> HI All, > >> >> > >> >> Been using AB for a couple of months now... I seem to have noticed a > >> >> performance degredation on the AB's use the past couple of days. I > >> >> can't see that I've added antyhing in particular that would cause > > this. > >> >> > >> >> Any ideas towards tracking down performance degredation in AB...? > >> >> > >> >> Thanks > >> >> > >> > > >> > > >> > > >> > ------------------------------------ > >> > > >> > Please note that this group is for discussion between users only. > >> > > >> > To get support from AmiBroker please send an e-mail directly to > >> > SUPPORT {at} amibroker.com > >> > > >> > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: > >> > http://www.amibroker.com/devlog/ > >> > > >> > For other support material please check also: > >> > http://www.amibroker.com/support.html > >> > Yahoo! Groups Links > >> > > >> > > >> > > >> > > > > > > > > ------------------------------------ > > > > Please note that this group is for discussion between users only. > > > > To get support from AmiBroker please send an e-mail directly to > > SUPPORT {at} amibroker.com > > > > For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG: > > http://www.amibroker.com/devlog/ > > > > For other support material please check also: > > http://www.amibroker.com/support.html > > Yahoo! Groups Links > > > > > > >
