Optimization Tips

[glro]

its nice but...
The code needs updating. It needs to search by ID instead.
(Or have arrays of the Inspector captions in all the local versions.)

Ooops.. just checked. The Outliner does not have an ID.
But Jim's system call 'may' work. The window object can have a different "name" than the text displayed on the caption bar.
Someone running a non-English version could test it and let us know.

I run a spanish computer using french as default language, and it doesn't work...

But there is a simple way to do it, using the standard line of code you mentioned, plus a messagebox

Code: Select all

result = UI.messagebox "if the outliner window is opened, close it?'", MB_YESNO
  if result == 6 #yes
     #close or open the outliner window
      status=UI.show_inspector "Outliner"
      if status==false then
        UI.show_inspector "Outliner"
      end
 end

This way, you don't toggle on the outliner window if it is not opened already, and if it is, you close it

[Dan Rathbun]

Actually we cannot close inspectors singly. Once they are open, we can only collapse or expand them.

[TIG]

For Windows windows only - using Win32API.so - which you'll need to 'require'...
You can 'close' just one window thus:
closeWindow("Outliner")
where:

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def closeWindow(name)
    findWindow = Win32API.new("user32.dll","FindWindow",['P','P'],'N')
    pw=findWindow.call(0,name)
    sendMessage = Win32API.new("user32.dll","SendMessage",['N','N','N','P'],'N')
    sendMessage.call(pw,0x0112,0xF060,0)#CLOSES
end

You can check if a window is 'visible' with:

Code: Select all

def windowIsVisible?(name)
    findWindow = Win32API.new("user32.dll","FindWindow",['P','P'],'N')
    isWindowVisible= Win32API.new("user32.dll","IsWindowVisible",['P'],'N')
    pw=findWindow.call(0,name)
    return isWindowVisible.call(pw)==1
end

Incidentally, the roll 'up'/'down' methods I often use are:

Code: Select all

def toggleRollUp(name)
    findWindow = Win32API.new("user32.dll","FindWindow",['P','P'],'N')
    pw=findWindow.call(0,name)
    sendMessage = Win32API.new("user32.dll","SendMessage",['N','N','N','P'],'N')
    sendMessage.call(pw,0x00a1,2,"")#WM_NCLBUTTONDOWN
    sendMessage.call(pw,0x0202,0,"")#WM_LBUTTONUP
end
def isRolledUp?(name)
    findWindow = Win32API.new("user32.dll","FindWindow",['P','P'],'N')
    getWindowRect= Win32API.new("user32.dll","GetWindowRect",['P','PP'],'N')
    pw=findWindow.call(0,name)
    data=Array.new.fill(0.chr,0..4*4).join
    getWindowRect.call(pw,data)
    rect=data.unpack("i*")
    #if window height is less than 90 then the window is rolledup
    return (rect[3]-rect[1]) < 90
end

... using isRolledUp?("Outliner") to then toggleRollUp("Outliner") to roll it up if it's down etc...

[glro]

Actually we cannot close inspectors singly. Once they are open, we can only collapse or expand them.

i am surely missing something

you are right; the window is not closed, only collapsed

but it is sufficient; my experience is that sketchup doesn't crash anymore

[TIG]

Collapsing [rolling-up] the Outliner is sufficient to stop it updating and causing bugsplats.
However, my methods just posted do also 'close' the window if desired - but this might be annoying for users [?]... remember to use the 'locale' name for the window...

[thomthom]

Page 152
http://www.slideshare.net/tenderlove/zo ... de-so-slow

attr_accessor :property vs def property; @property; end

attr_accessor wins.

Video of the presentation where the linked slideshow was used: http://confreaks.com/videos/427-rubycon ... de-so-slow

[Dan Rathbun]

That would be in the sub-catagory of load optimization.

However, later is there any difference when instances are instantiated ??

[thomthom]

What do you mean?

[Dan Rathbun]

The attr_* creation call is run on the C side so is bound to be faster. There is no parsing of text characters that make up the method definition, and translating to C-calls.

Also the built-in creates the @var and sets it to nil, so the pure Ruby version would also need to do that (within the initialize method, just to be fair.)

---

This work is all defintion work, done when the class is parsed and defined. It is only done once.

Who's classes have a million accessor methods that need to be defined ?

What I mean?
.. is that later, at Runtime, when actually calling the accessor method, to get the value of the instance variable, is there a speed difference between the method created by the C-call, and the method created by the Pure Ruby definition ?

I read the example as measuring the difference in method instance creation times. (Even methods are instances of a class object.)

[thomthom]

Have a look at the slideshow linked - from page 152 - it displays what does on on the C side and explains the difference. It also shows graphs for the speed difference.

The whole presentation is also interesting.

[Dan Rathbun]

I did.. It is not clear.

[thomthom]

I did.. It is not clear.

Page 154 vs 155 - you can see it does quite a lot of different things. On 154 which is the code for attr_reader it just directly fetches the value. In page 155 you can see it invokes a whole lot more (explained partly on page 156).

[jolran]

if vector1.samedirection?(vector2) => do something.... end

seams a little faster than:

next unless vector1.samedirection?(vector2) => do something...



Havent done any vigourious testing, could be specific case for me or maybe just a difference between if and unless.

Just wanted to mention I noticed some difference in speed for the 2 cases.

[thomthom]

Got some numbers? I'd be surprised if there was a change due to if vs unless.

Isn't it the "do something" that makes the difference here? Because you're comparing inverted logic that control whether "do something" is executed or not...

[jolran]

We are talking ms here, but still a consistent difference for me.

I was doing the condition inside a for loop.

Isn't it the "do something" that makes the difference here? Because you're comparing inverted logic that control whether "do something" is executed or not...

Maybe, I don't quite know the difference

This was at the end of the loop, so the loop would restart again anyway if the "if" statement was false and there where more items to process.
My theory was to shortcut whats inside the if statement and just go ahead to the next one. But that was slower..

I have also noticed the same kind of ms speedgain when using if @edge VS if @edge == true while setting
true or false elsewhere in the script.
But that is probably more logic, although one could possibly expect that only if @edge needs to do more lookups.

Again I could be overlooking something fundamental gotcha in Ruby, needs testing by others.
Maybe next time I'll test I 'll get opposite results

Edit: It could have something to do with that the if statement has an end in this case?
So the code get's encapsulated or something.
next unless vector1.samedirection?(vector2) => do something... end. Doesent work.

Anyway it shaved 2 seconds of a process that took 30 seconds.