Hi, Ran off a simple test of the uBLA performance for sqare matrix multiplication. Looks quite good. Put in Intels Math Kernel Library for good measure using uBLA as the data holder but with a call to dgemm. Do you think these are the kind of numbers I should be expecting? Numbers below. Added a chart to the files section http://groups.yahoo.com/group/Boost-Users/files/ called uBLA Performance.pdf Used head of CVS from today. Regards, Matthew Hurd ___________________________________________ Figures in the raw: Matrix Size intel7.1 vc7.0 mingw intel_mkl6.0_vc7.0 ___________________________________________ 1 2 2 2 1 2 13 12 13 11 3 32 30 34 31 4 51 46 59 70 5 67 59 85 109 7 70 78 92 180 9 85 94 113 262 12 99 115 139 304 16 110 131 159 362 20 118 127 178 355 26 125 135 196 334 33 132 148 209 390 42 134 158 217 389 53 130 163 228 451 67 133 171 233 459 84 138 177 241 467 105 133 176 239 473 132 133 178 241 468 166 106 174 233 448 208 90 148 196 445 261 40 63 63 427 327 24 43 45 434 409 24 44 45 421 512 11 12 12 404 640 12 12 12 459 800 36 38 38 455 1000 36 37 38 448 ___________________________________________