[Rd] Wish List: base::source() + Add Execution Time Argument

[Tomas Kalibera]

There is a simple way to achieve something similar: one can add a time 
stamp to each line of output, e.g. using "ts" command from "moreutils".

Tomas

On 12/21/2017 06:45 PM, Jim Hester wrote:
> R does provide the addTaskCallback / taskCallbackManager to run a
> callback function after every top level command. However there is not
> an equivalent interface that would be run _before_ each command, which
> would make it possible to time of top level calls and provide other
> execution measurements.
>
> On Thu, Dec 21, 2017 at 11:31 AM, William Dunlap via R-devel
> <r-devel at r-project.org> wrote:
>> Is source() the right place for this?  It may be, but we've had customers
>> who would like
>> this sort of thing done for commands entered by hand.  And there are those
>> who want
>> a description of any "non-triivial" objects created in .GlobalEnv by each
>> expression, ...
>> Do they need a way to wrap each expression evaluated in envir=.GlobalEnv
>> with a
>> function of their choice, one that would print times, datasets created,
>> etc.?
>>
>> Bill Dunlap
>> TIBCO Software
>> wdunlap tibco.com
>>
>> On Thu, Dec 21, 2017 at 3:46 AM, Juan Telleria <jtelleriar at gmail.com> wrote:
>>
>>> Dear R Developers,
>>>
>>> Adding to source() base function a Timer which indicates the execution time
>>> of the source code would be a very well welcome feature, and in my opinion
>>> not difficult to implement as an additional funtion argument.
>>>
>>> The source(timing = TRUE) function shall execute internally the following
>>> code for each statement:
>>>
>>> old <- Sys.time() # get start time at the beginning of source()
>>> # source code
>>> # print elapsed time
>>> new <- Sys.time() - old # calculate difference
>>> print(new) # print in nice format
>>>
>>> Thank you.
>>>
>>> Kind regards,
>>>
>>> Juan Telleria
>>>
>>>          [[alternative HTML version deleted]]
>>>
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>>>
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>>
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