Created attachment 898 [details] bench_matrix_vs_tensor.cpp Tensor maximum reduction seems slower than Eigen::Matrix maxCoeff : Bench Eigen Matrix vs Tensor GCC: 6.1.0 Eigen version: 3.3.90 Simd: SSE, SSE2 Eigen::nbThreads: 4 EIGEN_NO_DEBUG EIGEN_VECTORIZE EIGEN_HAS_OPENMP: 201511 omp_get_num_threads: 1 Maximum: Repeat: 1000 NRows NCols EMatrix ETensor 1024 1 0.000140889 0.000963703 2048 1 0.000260602 0.0019206 4096 1 0.000486688 0.00383406 8192 1 0.00097643 0.0077253 16384 1 0.00190814 0.0155693 32768 1 0.00395113 0.0307479 1024 2 0.000344763 0.00198935 2048 2 0.000504151 0.00386684 4096 2 0.000982226 0.00758934 8192 2 0.00192742 0.0155706 16384 2 0.00379141 0.0309431 32768 2 0.00894989 0.0614831 1024 3 0.000385924 0.00292994 2048 3 0.000758534 0.00565539 4096 3 0.00147188 0.0117033 8192 3 0.00289409 0.0230684 16384 3 0.00600971 0.0457924 32768 3 0.0137405 0.0915717
-- GitLab Migration Automatic Message -- This bug has been migrated to gitlab.com's GitLab instance and has been closed from further activity. You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.com/libeigen/eigen/issues/1628.