On Fri, 2 Jul 2021, Jano Kula wrote:

> Hello again,
> 
> likely a bug and one question. Using this code with lmtx:
> 
> \starttext
> \externalfigure[mill][width=40mm,cache=./first,conversion=gray.pdf] %
> mill...
> \externalfigure[mill][width=40mm,cache=.,conversion=gray.pdf]       %
> m_k_i_v_mill...
> \externalfigure[mill][width=40mm,cache=./second]                    % no
> visible caching
> \stoptext
> 
> *First two figures*
> Chached image in the ./cache subdirectory has a lmtx name without prefix,
> the cached image in the current directory has mkiv syntax with  m_k_i_v_
> prefix.
> 
> *Third figure*
> The images are cached to a specified directory, only when some conversion
> is used. I'd like to cache images without any transformation. Is there any
> conversion which doesn't alter the figure, just caches it? Is new
> conversion type needed? Or is there other way to force caching without
> conversion?

Conversion is costly and that is why caching makes sense there. What is the 
benefit of caching (i.e., simply copying the file to a different directory) 
when there is no conversion?

Aditya
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