[GitHub] [jena] afs commented on issue #1324: Poor performance when parsing huge literal in query (e.g. 100MB)

[GitBox <gi...@apache.org>]

afs commented on issue #1324:
URL: https://github.com/apache/jena/issues/1324#issuecomment-1177453788

   The issue we experience is buffer management. Linear growth of a few Kbytes for 100Mb is a lot of recopying. If it grew at say x1.5 (like a Java ArrayList) the effect would be much less. (The same issues can arise with Arraylist but much less pronounced).
   
   The grammar is the grammar in the SPARQL specification - it really "is the grammar" because the HTML in th spec was produced from this JavaCC grammar!
   
   The negation is only 3 chars ahead maximum. 
   
   @SimonBin - is this triple-quoted literals or single-quoted?
   
   In both cases, if the XML uses " for attributes, then a `'` quoting may make a difference but I suspect the buffer expansion is going to dominate.


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