From: arne@vajhoej.dk   
      
   On 6/24/2025 12:25 PM, Arne Vajhøj wrote:   
   > I don't like the #elif HAVE_VSNPRINTF code in tds_vasprintf.   
   >   
   > :-)   
   >   
   > The algorithm is basically to try vsnprintf with buffers   
   > increasing in size 512, 1024, 1536, ... until there is space.   
   >   
   > That is very inefficient compared to just use the return value.   
   >   
   > And since it does not use va_copy, then only the first call to   
   > vsnprintf will work.   
      
   Even if va_copy was called and we ignore the option of   
   using vsnprintf return value, then +512 is not good   
   compared to *2. +512 with a 1 GB CLOB value would mean   
   2 million calls to vsnprintf.   
      
   (I have not checked if TDS actually allow that long   
   statements, but +512 is a problem)   
      
   Arne   
      
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