Commits on Dec 22, 2020

1. sql/rowexec: don't allocate buf per row in sketchInfo.addRow …

   The `intbuf` array was meant to stay on the stack, but was escaping
   to the heap because the call through the `hash` function variable was
   opaque to escape analysis.
   
   At the end of a 4 hour, 2.2 TB IMPORT of TPC-E, this was responsible
   for **76.70%** of all heap allocations.
   
   Release note (performance improvement): SQL statistics collection
   has been made more efficient by avoiding an accidental heap allocation
   per row for some schemas.

   

   nvanbenschoten committed Dec 22, 2020
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