Comments on: Declaring Vectors

By: Darn that Jackson Dunstan! « /dev/luchador

Darn that Jackson Dunstan! « /dev/luchador — Mon, 18 Apr 2011 15:14:08 +0000

[...] add elements to an array or vector. It reads like nice clean code when I use it, but it’s slower (yes, slower!) than using the index operator. At least I never use delete, which can instantly [...]

By: whitered

whitered — Thu, 07 Oct 2010 12:27:16 +0000

the answer was found here: http://jpauclair.net/2009/12/05/tamarin-part-ii-more-on-array-and-vector/

By: whitered

whitered — Thu, 07 Oct 2010 10:52:46 +0000

There is a strange effect with increasing vector’s length
http://pastebin.com/27qGJa2X
Can anybody explain this?

By: Fumio Nonaka

Fumio Nonaka — Sat, 19 Jun 2010 15:34:17 +0000

They said Version 4.0.0 build 14159.
http://wonderfl.net/help#help_compiler

And the result of “new” is faster than “push single” and nearly equal to “scratch many”.

By: FlashPlayer10.1：看得见的加速 | 猫脸爬格子-flash资讯,游戏资讯

FlashPlayer10.1：看得见的加速 | 猫脸爬格子-flash资讯,游戏资讯 — Fri, 18 Jun 2010 06:08:32 +0000

[...] 更新如果想对一下参数更有感觉，请参考Jackson的帖子。他们代表了在AS3中使用不同的方法声明Vector Safari on Mac OSX 10.6.3: Flash Player [...]

By: jackson

jackson — Thu, 17 Jun 2010 17:09:01 +0000

I looked at the version you posted to wonderfl in nemo440 and it seems like your compiler generated a push for each element, similar to the “push single” test:

    303     pushstring        "new: "
    305     getscopeobject    1
    307     getslot           4
    309     getscopeobject    1
    311     getslot           3
    313     subtract          
    314     add               
    315     call              (1)
    317     pop               
    318     getscopeobject    1
    320     findpropstrict    flash.utils::getTimer
    322     callproperty      flash.utils::getTimer (0)
    325     convert_i         
    326     setslot           3
    328     getscopeobject    1
    330     pushbyte          0
    332     setslot           5
    334     jump              L5
 
 
    L6: 
    338     label             
    339     getscopeobject    1
    341     getlex            Vector
    343     getlex            int
    345     OP_0x53           
    346     bkpt              
    347     construct         (0)
    349     coerce            __AS3__.vec::Vector.
    351     setslot           6
    353     getscopeobject    1
    355     getslot           6
    357     pushbyte          100
    359     callpropvoid      http://adobe.com/AS3/2006/builtin::push (1)
    362     getscopeobject    1
    364     getslot           6
    366     pushbyte          101
    368     callpropvoid      http://adobe.com/AS3/2006/builtin::push (1)
    371     getscopeobject    1
    373     getslot           6
    375     pushbyte          102
    377     callpropvoid      http://adobe.com/AS3/2006/builtin::push (1)
    380     getscopeobject    1
    382     getslot           6
    384     pushbyte          103
    386     callpropvoid      http://adobe.com/AS3/2006/builtin::push (1)
    389     getscopeobject    1
    391     getslot           6
    393     pushbyte          104
    395     callpropvoid      http://adobe.com/AS3/2006/builtin::push (1)
    398     getscopeobject    1
    400     getslot           5
    402     increment_i       
    403     getscopeobject    1
    405     swap              
    406     setslot           5

Which version of Flex were you compiling with? For reference, I used MXMLC 4.0.0.14159.

By: Fumio Nonaka

Fumio Nonaka — Thu, 17 Jun 2010 16:57:46 +0000

To make test fair, each Vector instance should be assigned to a variable (v). Then the “new” seems to be almost equivalent to the “scratch many”.
http://wonderfl.net/c/4aBs

By: jackson

jackson — Wed, 16 Jun 2010 21:16:03 +0000

Yep, it's Flex 4 only according to Adobe's documentation.

By: nick

nick — Wed, 16 Jun 2010 21:09:41 +0000

anything other than Vector. does not compile for me in flex 3.5

Is this a flex 4 only thing?

-ndy

By: jackson

jackson — Wed, 16 Jun 2010 01:13:24 +0000

Cool. I’ll give it a try!