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updated release notes with entry about improved compile times

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for procedures with large numbers of variables

original commit: bc117fd4d567a6863689fec6814882a0f04e577a
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dyb 2017-11-09 11:12:34 -05:00
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release_notes/release_notes.stex
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@ -1760,6 +1760,16 @@ x86\_64 has been fixed.
%-----------------------------------------------------------------------------
\section{Performance Enhancements}\label{section:performance}
\subsection{Improved compile times (9.5.1)}
Compile times are now lower, sometimes by an order of magnitude or
more, for procedures with thousands of parameters, local variables,
and compiler-introduced temporaries.
For such procedures, the register/frame allocator proactively spills
variables with large live ranges, cutting down on the size and cost
of building the conflict graph used to represent pairs of variables
that are live at the same time and therefore cannot share a location.
\subsection{Improved oblist management (9.3.3)}
As a result of improvements in the handing of the oblist (symbol table),