[Python-ideas] Dynamic code NOPing

[Haoyi Li]

I think the lambda: solution really is the best solution. The additional
cost is the construction of one function object and one invocation per
logging call, which i suspect is about the lower limit.

It's also the most generally applicable: it has nothing specific to logging
in it at all! So it seems to me that if we were to change anything,
improving the lambdas (shorter syntax and/or optimizing away the overhead)
would be the way to go over some
string-interpolation-logging-specific special case in the interpreter.


On Wed, Dec 26, 2012 at 5:49 AM, Greg Ewing <greg.ewing at canterbury.ac.nz>wrote:

> Rene Nejsum wrote:
>
>> Interessting alternatives, but they do not quite come on as
>> flexible/usefull enough…
>>
>> Often debug statements have a lot of text and variables, like:
>>
>> log.debug( "The value of X, Y, Z is now: %d %s %d" % ( x, lookup(y),
>> factorial(2**15))
>>
>
> That needn't be a problem:
>
>    log.lazydebug(lambda: "The value of X, Y, Z is now: %d %s %d" %
>       (x, lookup(y), factorial(2**15)))
>
> --
> Greg
>
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