And I will answer my own question, having found the thread on the subject [1].

short answer: "DateAndTime now" got faster ;-)

Good job guys! Our test was flawed because it relied (unknowingly) on the delay 
in DateAndTime creation.

thx!
Johan

[1] 
http://lists.pharo.org/pipermail/pharo-dev_lists.pharo.org/2013-April/077569.html

On 18 Jan 2014, at 05:35, Johan Brichau <jo...@inceptive.be> wrote:

> I figured it out and it's because of this:
> 
> DateAndTime now = DateAndTime now
> 
> is true in Pharo 3
> is false in Pharo 2.0
> is false in Pharo 1.4
> 
> Did Pharo3 become so fast or did the clock precision decrease?
> 
> Johan
> 
> On 17 Jan 2014, at 22:23, Marcus Denker <marcus.den...@inria.fr> wrote:
> 
>> 
>> On 17 Jan 2014, at 18:43, Johan Brichau <jo...@inceptive.be> wrote:
>> 
>>> Hi Marcus,
>>> 
>>> I was hoping for that ;-)
>>> An NDA will not be necessary, just that I don't need to send our code to 
>>> the list and your guarantee to eat the image afterwards ;-)
>>> 
>>> Will put it on a shared Dropbox link and email you, is that fine?
>>> 
>> ok!
>> 
>>> Johan
>>> 
>>> Sent from my iPad
>>> 
>>>> On 17 Jan 2014, at 13:37, Marcus Denker <marcus.den...@inria.fr> wrote:
>>>> 
>>>> This could be a compiler bug…  I check that with you offline of the list 
>>>> (and sign any NDA needed ;-)
>>>> 
>>>> Marcus
>>>> 
>>>>> On 17 Jan 2014, at 13:27, Johan Brichau <jo...@inceptive.be> wrote:
>>>>> 
>>>>> Hi there,
>>>>> 
>>>>> In the process of porting our work to Pharo3, I encounter a bug where the 
>>>>> execution in the debugger works correctly but not outside of it.
>>>>> It consistently occurs in a testcase of our code, across different images 
>>>>> running Pharo 30700 and latest stable vm om mac (26 dec) as well as an 
>>>>> older vm (6 sep).
>>>>> 
>>>>> Since it's difficult to create a separate public test for this to 
>>>>> recreate the problem, how do we go about this?
>>>>> 
>>>>> cheers,
>>>>> Johan
>>>> 
>>>> 
>>> 
>> 
>> 
> 


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