From: Martin Kronbichler <kronbichler@lnm.mw.tum.de>
Date: Sat, 14 Mar 2020 21:57:25 +0000 (+0100)
Subject: Changelog
X-Git-Tag: v9.2.0-rc1~342^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1bdaa00970957b9761ce3ca05d495b489bb0308e;p=dealii.git

Changelog
---

diff --git a/doc/news/changes/minor/20200314MartinKronbichler b/doc/news/changes/minor/20200314MartinKronbichler
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+Improved: The initialization of the mapping part of MatrixFree for mappings of
+type MappingQGeneric or derived classes has been made much faster. Apart from
+a single query per cell for the geometry via the MappingQGeneric class, all
+interpolations to metric terms at quadrature points are now done with
+matrix-free routines using sum factorization, providing similar performance as
+an operator evaluation.
+<br>
+(Martin Kronbichler, 2020/03/14)
diff --git a/doc/news/changes/minor/20200314MartinKronbichler-b b/doc/news/changes/minor/20200314MartinKronbichler-b
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+++ b/doc/news/changes/minor/20200314MartinKronbichler-b
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+Improved: The detection of compression in the mapping data structures of
+MatrixFree has been made more general. It can now also detect when two cells
+(not necessarily adjacent ones) are translations of each other, so that the
+same set of Jacobians can be used on both. This helps the performance of
+matrix-free operator evaluation in case the geometry fits into processor
+caches and the operation is memory-bandwidth limited.
+<br>
+(Martin Kronbichler, 2020/03/14)