Re: [NTG-context] Automatically loading the page state, LoadPageState

1 Oct 2013

      On 10/1/2013 2:36 PM, Marco Patzer wrote:
...
On 2013–10–01 Marco Patzer wrote:
...
Hi,
I wonder if it's necessary to manually load the MetaPost variables
using LoadPageState. Some of them are static and do not require an
update on each page, e.g. NOfPages, but many of them might change on
each page, e.g. OnOddPage, PageNumber, TextWidth.
@Hans: How about adding some more of the dynamic variables to the
MPinitializations in meta-ini.mkiv?
like what

anyway,

\starttext

\startMPcode \stopMPcode

\testfeatureonce{1}{\startMPcode for i=1 upto 1     : LoadPageState ; 
endfor ; \stopMPcode}
\testfeatureonce{1}{\startMPcode for i=1 upto 10    : LoadPageState ; 
endfor ; \stopMPcode}
\testfeatureonce{1}{\startMPcode for i=1 upto 100   : LoadPageState ; 
endfor ; \stopMPcode}
\testfeatureonce{1}{\startMPcode for i=1 upto 1000  : LoadPageState ; 
endfor ; \stopMPcode}
\testfeatureonce{1}{\startMPcode for i=1 upto 10000 : LoadPageState ; 
endfor ; \stopMPcode}

% LoadPageState defined:

% system          > starting feature test
% system          > feature test done (0.001s)
% system          > starting feature test
% system          > feature test done (0.001s)
% system          > starting feature test
% system          > feature test done (0.002s)
% system          > starting feature test
% system          > feature test done (0.021s)
% system          > starting feature test
% system          > feature test done (0.210s)

% Directly set variables

% system          > starting feature test
% system          > feature test done (0.001s)
% system          > starting feature test
% system          > feature test done (0.001s)
% system          > starting feature test
% system          > feature test done (0.000s)
% system          > starting feature test
% system          > feature test done (0.001s)
% system          > starting feature test
% system          > feature test done (0.002s)

\stoptext

in mkiv the overhead is less than in mpii as we don't parse the blob in 
the same way and the mpiv code is also more optimized so we can consider 
dropping the SetPageState macro.

Hans

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