Hello, The answer is simple: SEND THE CODE you have problems with.
Otherwise the discussion is pointless. Best regards, Tomasz Janeczko amibroker.com ----- Original Message ----- From: "js8765" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Monday, May 12, 2008 12:22 AM Subject: Re: [amibroker] How To Restore Formula Speed? > How do you call a function once using AFL? > > If I look at the section "Understanding how AFL works" that is always > quoted whenever anyone has questions about the hard to grasp array > processing language, I can't see anything about how to call a function > once... > > Thanks for any help. > > P.S. Tomasz, everything is always easy when you know how. What maybe is > a bit more difficult is to put yourself in the position of others who > are still learning and understand that it is not so easy... > > Tomasz Janeczko wrote: >> Percentile involves sorting, it is currently implemented >> using absolutely the fastest algorithm known to human kind. >> >> What you can do to speed it up - that's easy - call it once >> and store result. >> This (calling same functions with same arguments many times instead calling >> it once) >> is the most common mistake people are making. >> >> >> Best regards, >> Tomasz Janeczko >> amibroker.com >> ----- Original Message ----- >> From: Louis Préfontaine >> To: [email protected] >> Sent: Sunday, May 11, 2008 4:15 PM >> Subject: Re: [amibroker] How To Restore Formula Speed? >> >> >> Hi Tomasz, >> >> Is there a way to speed up Percentile function? >> >> Thanks, >> >> Louis >> >> >> 2008/5/11 Tomasz Janeczko <[EMAIL PROTECTED]>: >> >> Hello, >> >> Use >> AFL Editor, >> Tools->Check and Profile >> to find the bottleneck in your code. >> >> Most often people are >> calling the same funciton over and over many times when >> they should call it ONCE and store the result in variable. >> This the most basic improvement can be applied to 99% of >> formulas written and posted here to get a lot more speed. >> The other thing is that you move all array function calls OUTSIDE >> loops. That's second principle: *never* call array function >> inside loop , unless you are doing something like iterating >> through multiple symbols. But NEVER call array funcitons >> inside per-bar loop. >> >> Best regards, >> Tomasz Janeczko >> amibroker.com >> >> >> ----- Original Message ----- >> From: "ondrej.uhlarik" <[EMAIL PROTECTED]> >> To: <[email protected]> >> Sent: Sunday, May 11, 2008 2:44 PM >> Subject: [amibroker] How To Restore Formula Speed? >> >> > Hello, >> > I have programed quite a complicated indicator in AFL. When I load it >> > in a pane it significantly slows down scrolling speed and reaction >> > speed in general. That I find very annoying, so I made a Toggle >> > parameter to switch between 2 modes: Basic (which does not show so much >> > but does not affect speed so much either) and Advanced (which shows >> > everything and affects speed a lot). Now the problem is as follows: >> > I insert the indicator in a pane in the Basic mode and the speed is ok. >> > Then I switch to the Advanced mode and the speed gets worse. Then I >> > switch back to the Basic mode but the speed remains bad, i.e. the >> > original speed is not restored. It seems that the Advanced data are >> > still loaded in some memory cache and affect speed of the indicator >> > even if I switch back to the Basic mode. Is there any chance to clear >> > or reset the data loaded in memory (or whatever) without removing the >> > indicator from the pane and re-inserting it back? >> > Thank you for your ideas, and please keep in mind that I am a beginner >> > in programing :) >> > >> > >> >> > ------------------------------------ >> >> > >> > 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 > > >
