[pdftex] typo in manual?

André Bellaïche abellaic at math.jussieu.fr
Thu Jul 29 10:15:59 CEST 2010


Le 29 juil. 2010 à 08:51, Paul Isambert a écrit :

> Selon Will Robertson <wspr81 at gmail.com>:
> 
>> On 29/07/2010, at 3:49 PM, Akira Kakuto wrote:
>> 
>>>> In the pdftex manual:
>>>> 
>>>>> \pdfelapsedtime (read--only integer)
>>>>> The command expands to a number that represents the time elapsed from the
>> moment of run start. The elapsed time is returned in scaled seconds: that
>> means seconds divided by 65536, e.g. pdfTEX has run for 949194 scaled seconds
>> when this paragraph was typeset.
>>> 
>>>> Should that "divided" actually be "multiplied" ?
>>> 
>>> I think it explains the unit "scaled second".
>> 
>> scaled seconds = seconds * 65536
>> 
>> Right?
> 
> No: scaled seconds = seconds/65536, otherwise it would have taken ages to
> typeset the paragraph. Here it has taken only 14.48 seconds. Note by the way
> that 65536 is also the number of scaled points in a point. Now I'll have an
> headache this early in the morning...
> 
> 
> Best,
> Paul
> 


1 scaled second = 1 second/65536

So, for some elapsed time

number of scaled seconds  = number of seconds * 65536

Saying
>> scaled seconds = seconds * 65536
is very ambiguous

André




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