[Scons-users] Improve speed of windows environment

Wed Apr 24 14:52:38 EDT 2019

Yep :

    def _create_env32(self, pkgroot):
        """Creates and returns the windows 32-bit environment"""
        SCons.Defaults.DefaultEnvironment(tools=[])
        sconsEnv = SCons.Environment.Environment(MSVC_VERSION = '10.0',
TARGET_ARCH = 'x86', tools=['msvc','mslink','mslib'])
        variables = EnvironmentVariablesVoiceWin32(pkgroot)
        return self.create_environment('win32', sconsEnv, variables)

Le mer. 24 avr. 2019, à 10 h 19, Bill Deegan <bill at baddogconsulting.com> a
écrit :

> Did you add the DefaultEnvironment(tools=[])?
>
> On Tue, Apr 23, 2019 at 8:28 PM Pierre-Luc Boily <
> pierreluc.boily at gmail.com> wrote:
>
>>
>>
>> Le mar. 23 avr. 2019, à 16 h 44, Bill Deegan <bill at baddogconsulting.com>
>> a écrit :
>>
>>> The tool isn't Object, but what type of tool creates an object.
>>> Note my email said
>>> env=Environment(tools=[only the tools you're using],...)
>>> not
>>> env=Environment(tools=[],)
>>>
>>
>> I know, I just wanted to do some test for my own comprehension =)
>>
>>
>>> Also why are you using: SCons.Environment.Environment  instead of
>>> Environment() ?
>>>
>>
>> Is it incorrect?   My SConstruct looks like this :
>> https://pastebin.com/SwB7GkGT.  He is really neat and clean.  All the
>> logic is in SConscriptManager and if I try to use only Environment call
>> (without the SCons.Environment) scons is complaining that he doesn't know
>> about Environment (NameError: name 'Environment' is not defined)
>>
>>
>>> In your case it looks like you need all of MSVC (at least) so:
>>> sconsEnv = Environment(MSVC_VERSION = '10.0', TARGET_ARCH = 'x86',
>>> tools=['msvc','mslink','mslib'])
>>>
>>
>> Ok thx,this works, but unfortunately, I have absolutely no performance
>> gain.  Just as a matter of test, if I use   Environment(MSVC_VERSION =
>> '10.0', TARGET_ARCH = 'x86', tools=[]), I can clearly see an improvement.
>> It takes around 600ms to create the environment.  But soon as I add only 1
>> tool, it goes back to 1500ms.  It looks like it doesn't make any difference
>> having 1 or 15 tools.. weird...
>>
>> Well, I guess I have to live with windows drawback to being bad with
>> starting process!!  I recently did a huge change in our scons
>> implementation to load only needed sconscript.  For same code base, I went
>> from :
>> SConstruct  took 16660.409 ms
>> to this
>> SConstruct  took 1500 ms
>>
>> Which is already an awesome improvement.... But you know, more you have,
>> more you want =)
>>
>>
>>
>>>
>>> Give that a try.
>>> -Bill
>>>
>>> On Tue, Apr 23, 2019 at 1:48 PM Pierre-Luc Boily <
>>> pierreluc.boily at gmail.com> wrote:
>>>
>>>> Ok, I tried  your solution but scons complains that Object doesn't
>>>> exist, (which is normal I know).  2 Stupids questions:
>>>>
>>>> 1- What is the difference between tools and builders in the
>>>> environment?  By doing this :
>>>> DefaultEnvironment(tools=[])
>>>> env=Environment(tools=[],...)
>>>>
>>>> both tools and builders are now empty.
>>>>
>>>> 2- I need env.Object, env.Library env.Program, but those are gone from
>>>> the BUILDERS section.  How to I add them when I create the Environment?
>>>> Tried this, but that doesn't work :
>>>> sconsEnv = SCons.Environment.Environment(MSVC_VERSION = '10.0',
>>>> TARGET_ARCH = 'x86', tools=['Object'])
>>>>
>>>> Thank you very much!
>>>>
>>>> Pierre-Luc
>>>>
>>>>
>>>> Le mar. 23 avr. 2019, à 10 h 54, Bill Deegan <bill at baddogconsulting.com>
>>>> a écrit :
>>>>
>>>>> Yes.
>>>>> This has long been the case.
>>>>> Launching processes in Windows is MUCH slower than linux.
>>>>> When SCons starts up it tries to load all the default tools.
>>>>> This involves launching numerous processes to see what tools are
>>>>> available and also which version(s)
>>>>> You can speed this up by only loading the tools you're using on
>>>>> windows.
>>>>>
>>>>> Do you only use env.Program() or do you also use Program() (which uses
>>>>> the DefaultEnvironment())
>>>>> So:
>>>>> DefaultEnvironment(tools=[])
>>>>> env=Environment(tools=[only the tools you're using],...)
>>>>>
>>>>> Should help.
>>>>>
>>>>> -Bill
>>>>>
>>>>>
>>>>>
>>>>> On Tue, Apr 23, 2019 at 10:07 AM Pierre-Luc Boily <
>>>>> pierreluc.boily at gmail.com> wrote:
>>>>>
>>>>>> Hello!
>>>>>>
>>>>>> I just realized that the creation of an environment is faster under
>>>>>> centos
>>>>>> compared to windows 10.  See below Dump trace with --deubg=time
>>>>>> arguments :
>>>>>>
>>>>>> Centos : https://pastebin.com/UPggyDcj
>>>>>> Windows : https://pastebin.com/11YzKNDH
>>>>>>
>>>>>> I already read somewhere that tool creation is time consuming, but
>>>>>> both
>>>>>> centos\windows environments looks similar to be regarding tools..
>>>>>> So, I
>>>>>> don't know why windows takes 1500 ms compare to 300ms for centos.
>>>>>>
>>>>>> Any idea?
>>>>>>
>>>>>> thx!
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Sent from: http://scons.1086193.n5.nabble.com/Users-f16930.html
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