ans = 4.1.0+ Norm diff: -1.208e-08, sparse time: 0.76956, full matrix time: 0.00071. Speed x: 1085.329186 Norm diff: -1.783e-08, sparse time: 0.76845, full matrix time: 0.00045. Speed x: 1692.811450 Norm diff: -1.625e-08, sparse time: 0.72354, full matrix time: 0.00040. Speed x: 1831.458057 Norm diff: -7.538e-09, sparse time: 0.66694, full matrix time: 0.00039. Speed x: 1714.052083 Norm diff: -5.498e-09, sparse time: 0.66717, full matrix time: 0.00040. Speed x: 1651.902007 Norm diff: -3.908e-09, sparse time: 2.72571, full matrix time: 0.00213. Speed x: 1280.229787 Norm diff: -1.15e-08, sparse time: 2.72919, full matrix time: 0.00207. Speed x: 1319.848726 Norm diff: -2.815e-09, sparse time: 2.75234, full matrix time: 0.00208. Speed x: 1326.303998 Norm diff: -1.118e-08, sparse time: 2.74783, full matrix time: 0.00203. Speed x: 1351.616630 Norm diff: -4.455e-09, sparse time: 2.72909, full matrix time: 0.00203. Speed x: 1346.980584 Norm diff: -5.124e-09, sparse time: 6.15583, full matrix time: 0.00643. Speed x: 957.836586 Norm diff: -3.809e-09, sparse time: 6.16687, full matrix time: 0.00634. Speed x: 972.066707 Norm diff: -8.518e-10, sparse time: 6.15964, full matrix time: 0.00643. Speed x: 958.392477 Norm diff: -1.19e-09, sparse time: 6.16068, full matrix time: 0.00637. Speed x: 967.455652 Norm diff: -2.036e-09, sparse time: 6.15486, full matrix time: 0.00643. Speed x: 957.826840