- nb. cores & \multicolumn{2}{c|}{gmres variant} & \multicolumn{2}{c|}{2 stage CGLS} & \multicolumn{2}{c|}{2 stage LSQR} & best gain \\
-\cline{2-7}
- & Time & \# Iter. & Time & \# Iter. & Time & \# Iter. & \\\hline \hline
- 512 & 3,969.69 & 33,120 & 709.57 & 5,790 & 622.76 & 5,070 & \\
- 1024 & 1,530.06 & 25,860 & 290.95 & 4,830 & 307.71 & 5,070 & \\
- 2048 & 919.62 & 31,470 & 237,52 & 8,040 & 194.22 & 6,510 & \\
- 4096 & 405.60 & 28,380 & 111.67 & 7,590 & 91.72 & 6,510 & \\
- 8192 & 785.04 & 109,590 & 76.07 & 10,470 & 69,42 & 9,030 & \\
+ nb. cores & \multicolumn{2}{c|}{GMRES} & \multicolumn{2}{c|}{TSARM CGLS} & \multicolumn{2}{c|}{TSARM LSQR} & \multicolumn{3}{c|}{efficiency} \\
+\cline{2-10}
+ & Time & \# Iter. & Time & \# Iter. & Time & \# Iter. & GMRES & TS CGLS & TS LSQR\\\hline \hline
+ 512 & 3,969.69 & 33,120 & 709.57 & 5,790 & 622.76 & 5,070 & 1 & 1 & 1 \\
+ 1024 & 1,530.06 & 25,860 & 290.95 & 4,830 & 307.71 & 5,070 & 1.30 & 1.21 & 1.01 \\
+ 2048 & 919.62 & 31,470 & 237.52 & 8,040 & 194.22 & 6,510 & 1.08 & .75 & .80\\
+ 4096 & 405.60 & 28,380 & 111.67 & 7,590 & 91.72 & 6,510 & 1.22 & .79 & .84 \\
+ 8192 & 785.04 & 109,590 & 76.07 & 10,470 & 69.42 & 9,030 & .32 & .58 & .56 \\