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Hello,
1. We have 64 bit version because:
a) several users asked for that 3+ years
ago
b) 3 years ago there was all the "hype" about 64
bit coming and it looked as everyone would jump onto 64 bit soon and as
AB is constantly leading
the innovation, I decided to implement AB in 64
bit
c) there was expectation that 64 bit will be
faster
d) 64-bit version allows to use more than 4GB of
RAM
2. Advantates:
a) allows you to use more than 4GB of RAM, which
may speed up backtests for very, very large databases
b) Runs slightly faster, when EQUAL versions are
compared. (The speedup is biggest in floating point calculations, so if
you for example calculate FFT, or lots of artihmetic in AFL
you will see it. The "overall" speed however is
mostly limited by memory/disk).
3. Limitations:
As of today NO data vendor provides 64 bit API .
Therefore it is impossible to write 64 bit data plugins for those
vendors.
Also any 3rd party plugins will not work UNLESS
they are compiled with 64 bit compiler. General rule is that 64 bit
application can only load
64 bit DLLs.
4. No, because of data vendors that do not provide
64 bit APIs.
5. Yes, AB 64 bit can use full 64 bit addressable
space
6. Into two different directories
7. Yes, 32 bit AmiBroker runs under any 64 bit
Windows (Vista and XP Professional x64 included)
8. It applies only to those who created their own
DLL plugins.
"Why doesn't I do this for you?" - because I don't
have your source files AND it is not as easy as just "compiling"
because
moving to 64 bit also requires code review for any
incompatibilites with 32 bit AND (in case of data plugins) because no
data vendor offers 64 bit API
9. Simply use 32 bit version. It runs fine under 64
bit Windows and all plugins work exist and work OK.
10. No. 32 bit version is enough as it contains all
features.
11. No
12. No, you don't have to. But if you
experience Windows Vista "elevation prompt" (from OTHER apps, not
AmIBroker) several times a day, you will quickly understand what
the whole story is about.
The whole nervousness about "setting up for optimum
performance" is somewhat overdone. In my opinion just leave the defaults
and that is OK.
Instead of worrying about tweaking hardware and AB
for 'optimum' perfomance you should rather make sure that no other
software is consuming most of the resources.
Nowadays, computers are loaded with performance
killers such as Norton Antivirus (and any other "real-time virus
scanners"), Desktop search (that
constantly index all data on all hard disks),
"accelerators" that decelerate your system, "enhancers" that cause
compatiblity problems, firewalls that eat CPU,
and all other kind of programs that just eat the
resources, etc, etc.
I am sorry, but I am busy with work on v5.13 so I
will stop here.
Best regards,
Tomasz Janeczko
amibroker.com
----- Original Message -----
From: Herman
To: Tomasz
Janeczko
Sent: Tuesday, June
24, 2008 10:16 AM
Subject: [amibroker]
Is Amibroker x64 For "Traders"
TJ,
for us non-techies and non-programmers, those who
simply want to trade, the whole 64 bit issue (mess) is utterly confusing
and frustrating. We need a clear, comprehensive, and official opinion
from AB on where we stand and how to set up AB for optimum performance.
Contrary to your opinion this is, for the silent majority, not simple.
For example:
- Why do we have AB64?
- What are the advantages of using
AB64?
- What are the limitations of using
AB64?
- Is AB64 of any use to real-time traders
using real-time data?
- Is the greater memory range of V64 used
by AB32?
- How do we install AB32 +
AB64?
- Does AB32+all Plugins run under
Vista64?
- It seems you are addressing programmers
and not traders...What does it mean: "You
need 64 bit compiler to compile your own plugins." If this is so simple wht doesn't AB do this for
us?
9. What does a 64 Bit Vista user have to do to
maintain ALL Amibroker capabilities?
10 we need to run BOTH AB32 and AB64 to enjoy all
AB features?
11 Do we need two partitions... this has been
mentioned a few times.
12 Do we, or do we not, have to fiddle with the
UAC?
... Other 64 bit users please feel free to add your
own questions here ...
Contrary to the general opinion that setting up AB
for optimum performance is simple and easy this is, for most "Traders",
not the case. We want to trade not become techies. I already spend a lot
of time browsing, searching, emailing, buying hardware, changing orders,
printing notes from many places, ... If I need another two week of this
headache I'll chuck AB64.
Best regards,
herman
For tips on developing Real-Time Auto-Trading
systems visit:
http://www.amibroker.org/userkb/
Tuesday, June 24, 2008, 2:32:04 AM, you
wrote:
> Hello,
> First the performance increase was measured
using version 4.90 (4.90 32 bit vs 4.90 64 bit).
> Since that time AFL engine has changed (there
were significant speedups and assembly-level
> optimizations to the code).
> You can only compare *same* versions. So you
would need to wait until 5.10 arrives
> because 5.10 again is faster than
5.00.
> The gain in 64 bit version had was due to the
fact that extended instruciton set was used
> that had slightly faster floating point
arithmetic (register based as opposed to stack based).
> Plugins work BUT only 64 bit versions of
plugins. You need 64 bit
> compiler to compile your own
plugins.
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message -----
> From: "dloyer123" <dloyer123@xxxxxxxxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Monday, June 23, 2008 9:00
PM
> Subject: [amibroker] Re: Amibroker
x64
>> Wow. That is a big performance
gain. I am a bit surprised. Most 64
>> bit programs I have worked with,
including databases have no
>> performance gain. The main
advantage to 64bit is the ability to
>> address more memory in a single
process.
>> Do plugins work at all? Or, do they
just need to be built using
>> 64bit? I wrote a few myself, just
performance hacks, so I can
>> rebuild them if I need to.
>> --- In amibroker@xxxxxxxxxxxxxxx, "sidhartha70" <sidhartha70@xxx>
>> wrote:
>>>
http://www.amibroker.com/x64/
>>> Yes, it's about 25% faster... but it
doesn't support real time
>>> feeds... so it's mainly of off-line
use or backtesting.
>>> --- In amibroker@xxxxxxxxxxxxxxx, "dloyer123" <dloyer123@> wrote:
>>> >
>>> > Where can we find the 64bit
download? I did not see it on the
>>> > download page.
>>> >
>>> > Also, is there an advantage to
using the 64bit version? Is it
>> any
>>> > faster?
>>> >
>>> > --- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <groups@>
>>> > wrote:
>>> > >
>>> > > Hello,
>>> > >
>>> > > Sometime in July
2008.
>>> > > x64 comes only with
official releases because very few users
>>> > actually use 64 bit
Windows
>>> > > (mainly because 64 bit
windows are problematic due to lack of
>>> > drivers for many external
hardware).
>>> > > Also no data vendor as of
today offers 64-bit API. Until data
>>> > vendors catch up with 64 bit
technology
>>> > > using of x64 version is
limited to local database only.
>>> > >
>>> > > Best regards,
>>> > > Tomasz Janeczko
>>> > > amibroker.com
>>> > > ----- Original Message
-----
>>> > > From: "tipequity"
<l3456@>
>>> > > To: <amibroker@xxxxxxxxxxxxxxx>
>>> > > Sent: Monday, June 23, 2008
7:46 AM
>>> > > Subject: [amibroker]
Amibroker x64
>>> > >
>>> > >
>>> > > > Tomasz
>>> > > >
>>> > > > Have you set a date to
release a x64 version of 5.1? If so,
>> when?
>>> > > > Addtionally, is it
feasible to concurrectly publish a x64
>> version
>>> > of
>>> > > > the beta
release?
>>> > > >
>>> > > >
>>> > > >
------------------------------------
>>> > > >
>>> > > > 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
>
------------------------------------
> 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
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