From d3c517f8aed135047d12a286cc8f452ec67c7e9f Mon Sep 17 00:00:00 2001
From: bangerth <bangerth@0785d39b-7218-0410-832d-ea1e28bc413d>
Date: Sat, 23 Nov 2013 18:24:05 +0000
Subject: [PATCH] Improve further.

git-svn-id: https://svn.dealii.org/trunk@31774 0785d39b-7218-0410-832d-ea1e28bc413d
---
 deal.II/source/numerics/data_out.cc | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/deal.II/source/numerics/data_out.cc b/deal.II/source/numerics/data_out.cc
index 8ac46cd8e5..d242eaa816 100644
--- a/deal.II/source/numerics/data_out.cc
+++ b/deal.II/source/numerics/data_out.cc
@@ -455,11 +455,13 @@ void DataOut<dim,DH>::build_patches (const Mapping<DH::dimension,DH::space_dimen
 		     std_cxx1x::function<void (const ::dealii::DataOutBase::Patch<DH::dimension, DH::space_dimension> &)>(),
                      thread_data,
                      sample_patch,
-		     2*multithread_info.n_threads(),
 		     // experimenting shows that we can make things run a bit
-		     // faster if we increase the number of items in flight at
-		     // any given time (about 10% on the testcase discussed in
-		     // @ref workstream_paper, on 32 cores)
+		     // faster if we increase the number of cells we work on
+		     // per item (i.e., WorkStream's chunk_size argument,
+		     // about 10% improvement) and the items in flight at any
+		     // given time (another 5% on the testcase discussed in
+		     // @ref workstream_paper, on 32 cores) and if
+		     8*multithread_info.n_threads(),
 		     64);
 }
 
-- 
2.39.5