/*
* Redberry: symbolic tensor computations.
*
* Copyright (c) 2010-2012:
* Stanislav Poslavsky <stvlpos@mail.ru>
* Bolotin Dmitriy <bolotin.dmitriy@gmail.com>
*
* This file is part of Redberry.
*
* Redberry is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Redberry is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Redberry. If not, see <http://www.gnu.org/licenses/>.
*/
package cc.redberry.core.performance;
import cc.redberry.core.context.ContextManager;
import cc.redberry.core.indexmapping.IndexMappingBuffer;
import cc.redberry.core.indexmapping.IndexMappings;
import cc.redberry.core.indexmapping.MappingsPort;
import cc.redberry.core.tensor.Tensor;
import cc.redberry.core.tensor.Tensors;
/**
*
* @author Dmitry Bolotin
* @author Stanislav Poslavsky
*/
public class IndexMappingPerformance {
public static void main(String[] args) {
while (true)
System.out.println(t());
}
private static long t() {
String e0 = "g_ax*(d_c*G^x_bd-d_d*G^x_bc+G^x_yc*G^y_bd-G^x_yd*G^y_bc)";
String e1 = "g_px*(d_r*G^x_qs-d_s*G^x_qr+G^x_yr*G^y_qs-G^x_ys*G^y_qr)";
e1 = e1.replace('_', '#').replace('^', '_').replace('#', '^');
long time = 0;
for (int k = 0; k < 500; ++k) {
ContextManager.initializeNew();
Tensor riman1 = Tensors.parse(e0);
Tensor riman2 = Tensors.parse(e1);
long start = System.currentTimeMillis();
for (int i = 0; i < 1000; ++i) {
MappingsPort mp = IndexMappings.createPort(riman1, riman2);
IndexMappingBuffer buffera;
while ((buffera = mp.take()) != null);
}
time += System.currentTimeMillis() - start;
}
return time;
}
}