----- Original Message -----
Sent: Wednesday, October 29, 2008 4:09
PM
Subject: [amibroker] Code Change Question
for HHV -- Was: RT AB Sluggish at Small Time Settings --
TJ or
anyone:
That
was helpful.
Formula has an HHV(C,period); function.
Period
is calculated below:
bi = BarIndex();
bv =
BeginValue(bi);
ev =
EndValue(bi);
sv =
SelectedValue(bi);
Length =
ev - bv;
Days =
ev - sv;//EndValue(BarIndex()) -
SelectedValue(BarIndex());
Sbv =
IIf(bi ==
bv,1,0);
Period =
BarsSince(Sbv);
The HHV function takes all the time, but the
sluggishness occurs when there is no BeginValue (Green) pole set and 10 min or
5 min Interval is set. Period thus becomes all of the bars, and the HHV
function takes all of the time (Check and Profile said 9 seconds, which seems
like 1 minute).
Question1: is there a
fast execution HHV procedure that can be written (faster than HHV)? What
would it be?
Question2: assuming I
stay with HHV, how do I limit the length of processing if there is no Green
pole (BeginValue) set on the screen (thus limiting bars processed). I tried
something using the Min function but did not improve
anything.
Any simple coding
suggestions for my questions?
Ken
Hello,
Go to Formula Editor, select Tools->Check And
Profile
and found bottleneck in your formula using profiler
timing.
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
Sent: Wednesday, October 29, 2008 11:41
AM
Subject: [amibroker] RT AB Sluggish at
Small Time Settings
Can someone suggest
what I may check or diagnosis to get a handle on and fix for this
problem.
I have used AB with my
QuoteTracker feed for over a year now. Of course I have some gaps in
my data because QT and my source, Fidelity account, will not permit
backfills.
Suddenly, yesterday, AB
is totally bogged down if I select 5 minute data. When I start it up,
it automatically comes up in hourly mode and is ok. Switching pole
positions for example is almost instantaneous. If I switch to 15 min
display, I get a noticeable delay, maybe 3 to 5 seconds for the pole to
appear. (I also have the Task Manager open and can watch broker.exe jump to
the top of CPU usage and then drop down. If I click on 5 min data, CPU
goes to 100%, Broker.exe is pegged at near 92 to 95% and it will take
literally 1 to 2 minutes to get the cursor back. Again, the day before
yesterday, everything worked fine.
What changed?
Nothing that I know of. I was experimenting with a rather long formula
file (developed in EOD environment), and earlier versions worked ok, but
maybe this had something to do with the slowdown. I deleted the
formula from the RT database, and rebooted the computer.
What else can I try and
what other data can I gather to diagnose this problem?
Thanks.
Running AB 5.19, with
XP and plenty of RAM and HD