Optimizing abc-code

hi there,
I've got another question. Our Alchemy-SWF has about 20 DoABC2-Tags. In these Tags, I often see entries like
findpropstrict     bla
getproperty       bla
In the docs, I've seen that getlex bla is the same as doing these two operations. So I thought, why not use the optimizer.exe from the bin dir of the flexsdk? After doing this, the filesize was reduced significantly by about 130kb (uncompressed). The optimizer removed the debugging-lines as well as it replaced the above op-codes with getlex. This is very nice, I think
When looking inside the optimized SWF, there's only one DoABC2-Tag left (what seems to be intelligent to me).
I have to add something to the unoptimized version: somewhere in the ABC-files, I found duplicate entries for findpropstrict, followed by a getproperty, like this:
offset 47ce4: D0                       getlocal0
offset 47ce5: 30                       pushscope
offset 47ce6: D0                       getlocal0
offset 47ce7: 49 00                    constructsuper    (0)
offset 47ce9: D0                       getlocal0
offset 47cea: D1                       getlocal1
offset 47ceb: 68 CA 04                 initproperty      private:proc
offset 47cee: 5D 93 01                 findpropstrict    mstate
offset 47cf1: 66 93 01                 getproperty       mstate
offset 47cf4: 24 00                    pushbyte          0
offset 47cf6: 46 B1 02 01              callproperty      push (1)
offset 47cfa: 29                       pop
offset 47cfb: 5D 93 01                 findpropstrict    mstate
offset 47cfe: 66 93 01                 getproperty       mstate
offset 47d01: 5D 93 01                 findpropstrict    mstate
offset 47d04: 66 93 01                 getproperty       mstate
offset 47d07: 66 AC 02                 getproperty       ebp
offset 47d0a: 46 B1 02 01              callproperty      push (1)
offset 47d0e: 29                       pop
offset 47d0f: 5D 93 01                 findpropstrict    mstate
offset 47d12: 66 93 01                 getproperty       mstate
offset 47d15: 5D 93 01                 findpropstrict    mstate
offset 47d18: 66 93 01                 getproperty       mstate
offset 47d1b: 66 AB 02                 getproperty       esp
offset 47d1e: 61 AC 02                 setproperty       ebp
offset 47d21: 47                       returnvoid
May I remove the op-codes at offsets 47d01, 47d07 and 47d15, 47d18?
The optimizer optmized this of course, so I only have two entries of getlex left May I remove the duplicate entry safely without damging the file?
I also found other duplicate op-codes:
offset af271: 60 25                    getlex            cmodule.swc.blackcat:Machine
offset af273: 30                       pushscope
offset af274: 64                       getglobalscope
offset af275: 6C 1B                    getslot           27
offset af277: 58 42                    newclass          cmodule.swc.blackcat:FSM__longjmp
offset af279: 1D                       popscope
offset af27a: 1D                       popscope
offset af27b: 1D                       popscope
offset af27c: 68 C2 05                 initproperty      cmodule.swc.blackcat:FSM__longjmp
offset af27f: 65 00                    getscopeobject    0
offset af281: 20                       pushnull
May I remove the op-codes at offset af27a and af27b?
Two final questions: Are there any other op-codes that can be merged together, like findpropstrict,getproperty => getlex?
And: Why doesn't gcc+/Flex mxmlc do these optimizations?
Best Regards,
Daniel

Hello Duncan,
if you use the "Project/Export Release Build" option in Flash Builder the IDE will compile a SWF with special optimizing flags that will also strip the debugging information. If you use the command line compilers mxmlc or compc directly please read Adobe's livedocs about the command line options. There are special flags for optimizing and stripping debug information.
It seems that you are trying to optimize your SWFs for size (and perhaps also speed). If so you might find these projects and links interesting:
Joa Ebert's apparat
Source: http://code.google.com/p/apparat/
Blog: http://blog.joa-ebert.com/
as3swf by Claus Wahlers
Source: http://github.com/claus/as3swf
Blog: http://wahlers.com.br/claus/blog/
Nicolas Cannasse's haxe
Home: http://haxe.org/
Blog: http://ncannasse.fr/blog/adobe_alchemy
Another scream on Flash, Alchemy Memory and compilers.
http://www.unitzeroone.com/blog/2009/05/22/another-scream-on-flash-alchemy-memory-and-comp ilers/
Best wishes,
- Bernd

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hye..
i am inserting my comments
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hi
plz use the below code :
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AND KADKY EQ W_KADKY
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read from it_keko into wa_keko
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AND WERKS EQ<fs_data>-HEADER_PLANT
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Aparna
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Attachments:
DSP48.JPG ‏134 KB
old_code.JPG ‏90 KB

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ENDFORM.                    " add_record

Hi,
Check this code. See the comments where i have mentioned "Add / Remove this".
For tables like BSEG, BKPF and WITH_ITEM you have to provide complete key to read from table. BUKRS should be the first field in select statement.
Also, you do not need to check LIFNR NE '', when you select from BSEG. Just read the first line item. It is vendor / customer line item.
Also, <b>DO NOT USE SAPGUI_PROGRESS_INDICATOR inside loop</b>. It does affect performance.
Let me know if you still have performance issue.
SELECT SINGLE *
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               WHERE bukrs EQ p_bukrs
               AND saknr EQ p_saknr.
IF sy-subrc EQ 0.
SELECT blart belnr waers monat budat bukrs hkont buzei
shkzg dmbtr wrbtr gjahr
INTO CORRESPONDING FIELDS OF TABLE it_bsis
FROM bsis
WHERE bukrs EQ p_bukrs
AND hkont EQ p_saknr
AND gjahr IN p_gjahr
AND monat IN p_monat.
PERFORM add_record.
ENDIF.
*       FORM add_record                                               *
FORM add_record .
LOOP AT it_bsis.
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    <data>-bukrs = it_bsis-bukrs. "Company
    <data>-hkont = it_bsis-hkont. "G/L Acct.
    <data>-gjahr = it_bsis-gjahr.
    <data>-waers = it_bsis-waers.
    <data>-belnr = it_bsis-belnr.
    <data>-monat = it_bsis-monat.
    <data>-budat = it_bsis-budat.
    <data>-blart = it_bsis-blart.
    IF it_bsis-shkzg ='H'.
      <data>-wrbtr = it_bsis-wrbtr * -1.
      <data>-dmbtr = it_bsis-dmbtr * -1.
    ELSE.
      <data>-wrbtr = it_bsis-wrbtr.
      <data>-dmbtr = it_bsis-dmbtr.
    ENDIF.
    SELECT SINGLE
                 lifnr
                 sgtxt FROM bseg
                       INTO gs_vendor
                       WHERE bukrs = it_bsis-bukrs " --> Add this
                       AND belnr = it_bsis-belnr
                       AND gjahr IN p_gjahr
                       AND buzei = '001'.    " --> Add this
*                       AND lifnr NE ''.     " --> Remove this
    SELECT SINGLE lifnr name1 stcd1
    FROM lfa1
    INTO gs_lfa1
    WHERE lifnr = gs_vendor-lifnr.
    <data>-lifnr = gs_lfa1-lifnr.
    <data>-sgtxt = gs_vendor-sgtxt.
    <data>-name1 = gs_lfa1-name1.
    <data>-stcd1 = gs_lfa1-stcd1.
    SELECT SINGLE wt_withcd
    FROM with_item
    INTO gs_item
    WHERE bukrs = it_bsis-bukrs " --> Add this
    AND belnr = it_bsis-belnr
    AND gjahr IN p_gjahr.
    IF sy-subrc EQ 0.
      <data>-mwskz = gs_item.
    ENDIF.
    SELECT SINGLE ppnam usnam bldat
    FROM bkpf
    INTO gs_bkpf
    WHERE bukrs = it_bsis-bukrs   " --> Add this
    AND belnr = it_bsis-belnr
    AND gjahr IN p_gjahr.
    <data>-ppnam = gs_bkpf-ppnam.
    <data>-usnam = gs_bkpf-usnam.
    <data>-bldat = gs_bkpf-bldat.
ENDLOOP.
ENDFORM.
Regards,
RS

Optimizing Performance

I am having a problem with my program as I am not getting the
desired frame rate due to all the code that is getting executed per
tick. So I have some questions about director and lingo as to which
way actually executes faster.
1. Multiple
ExitFrame calls vs a single
ExitFrame call.
I have alot of sprites in my app. Almost all of them have an
ExitFrame handler.
Question: is it faster to have each sprite handle it's own
ExitFrame routine and do code specific to that sprite or is
it faster to have one generic
ExitFrame to loop through and execute code for each sprite?
2. Puppeted sprites vs Non-Puppeted sprites.
I have a alot of sprites in my program. To make life ALOT
easier, I simply allocated a good chunk of sprite channels to sole
use of "dynamically created sprites". My program can have hunders
of puppeted sprites from any given moment to the next.
Question: Does director progress faster or slower depending
on if a sprite is puppeted or not? Or is there any difference at
all?
3. Checking to see if a variable is set before setting it.
I have only recently come into the Director/Lingo world of
programming. I am originally a VB programmer for almost a decade.
In visual basic, I have noticed that the code executes faster if
you don't do unneeded variable assignments by checking to see if it
was already set.
Example: In visual basic, let's say you have an array of 1000
elements, some elements are already set, some are not.
for i = 1 to 1000
var(i) = i
next
The above code executes fast, but if you are doing that very
very often, it can be a bottle neck.
the below code, while doing the exact same thing, actually is
faster.
for i = 1 to 1000
if var(i) <> i then var(i) = i
next
In VB, it's faster to do a check of a variable than it is to
do the assignment when it's not needed. Now granted, this is a poor
example, usually I am dealing with much more complex routines, but
the basic principle of what I am trying to get across is the same.
Question: in Director/lingo, would it speed up the execution
of code to do a variable check before the assignment, or is the
very act of adding the check going to slow the down the execution?
Anyone have any ideas about these? Or anyone have any other
tips about stupid little things to speed up execution of
code?

>
1. Multiple
ExitFrame calls vs a single
ExitFrame
> call.
You should consider dropping the exitframe approach, in favor
of an oop
model.
OOP is not faster, as a dual core processor is not faster
than a single core
one running at double the speed. In fact, the second should
be faster, since
there is no synchronization penalty. However, it is much
smoother. Same with
oop, you have a penalty, since you are using more objects,
but the objects
can be smart enough to adjust the number of instructions they
execute as
required.
If you e.g. have objects whose coordinates can be calculated
and stored
inside the object, you don't have to update the stage each
time an object
moves. You can do that once, for all objects in set
intervals. Long as the
interval is large enough to handle all intermediate
processing and
updatestage cost, you'll have a very smooth movie.
>
2. Puppeted sprites vs Non-Puppeted sprites.
Puppeting does not affect performance -or at least it
shouldn't. The number
of sprites, and number of behaviors attached to each sprite
does. However,
even when there is a very large number of sprites active, the
procedure
should be a joke for any modern cpu. What does cost, is
redrawing the
sprites. So, if it's image sprites we are talking about, you
should perhaps
consider a single bitmap member you should use as a buffer,
and imaging
lingo for drawing each frame. The mouse click events can be
evaluated by
keeping a list of virtual sprite positions. Even if not
familiar with the
above, the time you'll invest in learning what is required,
will be rewarded
with a significant -up to times x- performance increase.
>
3. Checking to see if a variable is set before setting it.
You can create a simple lingo benchmarking script to get your
answers. As a
general principle, the less commands the faster. Though not
really into VB
(I find c++ and lingo to be a killer combination), I can
assume why this is
happening: when setting a variable, vb is executing some code
to evaluate
what the value was, and what -if anything- has to be
released. Though
nowhere documented, it seems that several years ago, someone
in the director
dev team was smart enough to take this matter into account
when creating the
object that is known as a lingo variable (64bit internally,
btw). So,
director doesn't suffer slow variable release - releasing
what shouldn't be
released that is.
> Anyone have any ideas about these? Or anyone have any
other tips about
> stupid
> little things to speed up execution of code?
You know, a few years ago, lingo performance/speeding up
director was a
regular discussion issue in this list. This is not the case
anymore. And
though I can guess a couple reasons why, I found none to be
qualified as an
explanation.. Not in my book at least. Case you have any more
questions, I'd
be happy to answer. Building a site with director performance
hints /
optimizing lingo code is high in my to do list.
"DaveGallant" <[email protected]> wrote in
message
news:[email protected]...
>I am having a problem with my program as I am not getting
the desired frame
> rate due to all the code that is getting executed per
tick. So I have some
> questions about director and lingo as to which way
actually executes
> faster.
>
>
1. Multiple
ExitFrame calls vs a single
ExitFrame
> call.
>
> I have alot of sprites in my app. Almost all of them
have an
>
ExitFrame
> handler.
> Question: is it faster to have each sprite handle it's
own
>
ExitFrame
> routine and do code specific to that sprite or is it
faster to have one
> generic
>
ExitFrame to loop through and execute code for each sprite?
>
>
2. Puppeted sprites vs Non-Puppeted sprites.
>
> I have a alot of sprites in my program. To make life
ALOT easier, I simply
> allocated a good chunk of sprite channels to sole use of
"dynamically
> created
> sprites". My program can have hunders of puppeted
sprites from any given
> moment
> to the next.
> Question: Does director progress faster or slower
depending on if a sprite
> is
> puppeted or not? Or is there any difference at all?
>
>
3. Checking to see if a variable is set before setting it.
>
> I have only recently come into the Director/Lingo world
of programming. I
> am
> originally a VB programmer for almost a decade. In
visual basic, I have
> noticed
> that the code executes faster if you don't do unneeded
variable
> assignments by
> checking to see if it was already set.
>
> Example: In visual basic, let's say you have an array of
1000 elements,
> some
> elements are already set, some are not.
>
> for i = 1 to 1000
> var(i) = i
> next
>
> The above code executes fast, but if you are doing that
very very often,
> it
> can be a bottle neck.
> the below code, while doing the exact same thing,
actually is faster.
>
> for i = 1 to 1000
> if var(i) <> i then var(i) = i
> next
>
> In VB, it's faster to do a check of a variable than it
is to do the
> assignment
> when it's not needed. Now granted, this is a poor
example, usually I am
> dealing
> with much more complex routines, but the basic principle
of what I am
> trying to
> get across is the same.
>
> Question: in Director/lingo, would it speed up the
execution of code to do
> a
> variable check before the assignment, or is the very act
of adding the
> check
> going to slow the down the execution?
>
>
>
> Anyone have any ideas about these? Or anyone have any
other tips about
> stupid
> little things to speed up execution of code?
>

Cannot compile code with debug symbols

I have a source code file that will not compile with debug symbols. I get an assertion failed in file ../src/regman/regman_local.cc at line 5224. The compile command and output are below.
/opt/SUNWspro/bin/cc -g -xarch=v9b -xopenmp=noopt -xc99=all -c -o output/spirecon.o spirecon.c
cg: assertion failed in file ../src/regman/regman_local.cc at line 5224
cg: Out of range
cg: 1 errors
cc: cg failed for spirecon.c
However without the debug options and using the default -fast switch, i.e.
/opt/SUNWspro/bin/cc -fast -xarch=v9b -xopenmp=noopt -xc99=all -c -o output/spirecon.o spirecon.c
it compiles without any problems.
I was hoping someone might have a suggestion as to how what might cause this type of error.

I have been told this is bugid: 4420630
It only happens when you try to use the optimizing
backend code generator without any optimization.
(That's what -xopenmp=noopt does)
If you add an -xO1 flag the assertion should go away, but you
will also lose some (but not all) of your debuggability.
--chris

What are the compiler generated codes for objective-c?

After the compilation, the code for c/c++ is known as "object code" i.e. ".obj" file, and the binary executable file is ".exe" .
Similarly for java the compiled code is known as ".class" file.
In case of Objective-c what is the output of Compiler and what is the Executable file?

Strictly speaking, .obj and .exe refer only to the output of the compiler and linker for a Windows system (or cross compiler). For *nix compliant systems the output of the compiler is usually given a .o suffix and the executable produced after linking is named whatever you choose; but usually with no suffix at all.
Also, technically speaking, Java .class fiels don't fit neatly into this paradigm. The output of a Java compiler isn't object code, per se; it's optimized byte-code that can be run by the JRE.

Optimizing abc-code

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