[Glass] Weird slowdown with a comparison

[Mariano Martinez Peck]

On Wed, Dec 11, 2013 at 11:42 PM, John McIntosh <
johnmci at smalltalkconsulting.com> wrote:

> You know I've not played in this area but in data/system.conf
>
>
> # This is set to allow breakpoints to be used ....
>
> # For production usage, set GEM_NATIVE_CODE_ENABLED
>
> #  in the conf file for the appropriate gem
>
> #  (see
>
> #    $GEMSTONE/seaside/etc/maintenance30.conf
>
> #    $GEMSTONE/seaside/etc/seaside30.conf)
>
> #
>
> GEM_NATIVE_CODE_ENABLED = FALSE;
>
>
>
Wow...i didn't know the JIT could be enable/disabled. Nice! Thanks for
letting me know.

I have just check using the Admin -> DoITs -> Gem Configuration Report
 from GemTools and it was already in TRUE.
Just in case, I
edited  /opt/gemstone/GemStone64Bit3.1.0.4-i386.Darwin/seaside/data/system.conf
 and add it to TRUE.

Still, I am having the same results :(

What is weird is that I can use breakpoint in GemStone...so maybe the JIT
is not being run even if the boolean appears to be set..
But the default says it is TRUE.

Thanks,


>   Admin manual states:
>
> "By default, generation of native code for Smalltalk methods is enabled.
> This is configured using the configuration parameter
> GEM_NATIVE_CODE_ENABLED. When native code is disabled, execution is
> interpreted; behavior will be identical but somewhat slower. "
>
> See
> http://downloads.gemtalksystems.com/docs/GemStone64/3.1.x/GS64-SysAdminGuide-3.1.pdf page 84
>
> You could fiddle, restart your stone and run your tests again to see what
> happens.
>
>
>
>
> On Wed, Dec 11, 2013 at 9:32 PM, Mariano Martinez Peck <
> marianopeck at gmail.com> wrote:
>
>> Hi,
>>
>> I am profiling some reports that take some time in GemStone and I come to
>> a place that I find weird. So I want to check with you to see if this is
>> expected.
>>
>> | char newline carriageReturn |
>> char := $a.
>> newline := Character lf.
>> carriageReturn := Character cr.
>> [1 to: 1000000 do:  [ :i |
>>  char == carriageReturn  or: [ char == newline ] .
>>  ]
>> ] timeToRun
>>
>> The following code, takes approx 5 ms in Pharo (Cog). While in GemStone
>> it takes me around 60ms. That is 12 times slower...
>> Am I doing something wrong? I used #to:do but #timesRepeat got similar
>> results. I try to not affect GC by putting the stuff before the loop. I
>> tried to run it several times just in case...
>>
>> So....is that expected or I am missing something?
>>
>> Thanks,
>>
>> --
>> Mariano
>> http://marianopeck.wordpress.com
>>
>> _______________________________________________
>> Glass mailing list
>> Glass at lists.gemtalksystems.com
>> http://lists.gemtalksystems.com/mailman/listinfo/glass
>>
>>
>
>
> --
> ===========================================================================
> John M. McIntosh <johnmci at smalltalkconsulting.com>
> Corporate Smalltalk Consulting Ltd. Twitter: squeaker68882
> ===========================================================================
>
>


-- 
Mariano
http://marianopeck.wordpress.com
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