(Matrix + Matrix) Addition Timing Results:

 Non-optimized builds (SRT_QUAL = default) Optimized builds (SRT_QUAL = maxopt) 5x5 Matrix 6x6 Matrix 5x5 Matrix 6x6 Matrix LinearAlgebra Matrix + Matrix Matrices not specialized Matrices not declared symmetric [tsnadd01] 3.78 4.64 3.76 4.62 LinearAlgebra Matrix + Matrix Matrices not specialized Matrices declared symmetric [tsnadd01] 2.86 3.62 2.84 3.65 LinearAlgebra Matrix + Matrix Matrices specialized Matrices not declared symmetric [tsnadd01] 1.98 2.29 1.99 2.29 LinearAlgebra Matrix + Matrix Matrices specialized Matrices declared symmetric [tsnadd01] 2.88 3.67 2.84 3.64 CLHEP HepMatrix + HepMatrix [tsnadd02] 2.36 3.49 2.37 3.49 CLHEP HepSymMatrix + HepSymMatrix [tsnadd03] 1.86 2.53 1.9 2.55 CovMatrices (*) CovMatrixX + CovMatrixX [tsnadd04] 0.08 0.14 0.08 0.18

All timings are based on 1,000,000 additions.
The number is the time for 1 addition in microseconds (µsecs).
(also, since we have a total of 1,000,000 calculations, the same number is the total addition time in seconds).
The string in the bracket is the name of the test module build for the particular test.
When the results say "Non-Optimized builds," then all the libraries and the test module were build with the "SRT_QUAL" variable having the "default" value.
When the results say "Optimized builds," then all the libraries and the test module were build with the "SRT_QUAL" variable having the "maxopt" value.

(*) Covariant Matrices are inherently symmetric

Matrices used in the tests:

LinearAlgebra:
both 5x5 matrices:
1e+03                    4                    6                    8                  10
4         1.1e+03                  16                  18                  20
6                  16         1.2e+03                  28                  30
8                  18                  28         1.3e+03                  40
10                  20                  30                  40         1.4e+03
both 6x6 matrices:
1e+03                    4                    6                    8                  10                  12
4         1.1e+03                  18                  20                  22                  24
6                  18         1.2e+03                  32                  34                  36
8                  20                  32         1.3e+03                  46                  48
10                 22                  34                  46         1.4e+03                  60
12                 24                 36                  48                  60         1.5e+03

CLHEP:
both 5x5 matrices:
1000                4                6                8              10
4          1100              16              18              20
6              16          1200              28              30
8              18              28          1300              40
10              20              30              40          1400
both 6x6 matrices:
1000                4                6                8              10              12
4          1100              18              20              22              24
6              18          1200              32              34              36
8              20              32          1300              46              48
10              22              34              46          1400              60
12              24              36              48              60          1500

CovMatrices:
both 5x5 matrices:
+1.0000000000e+03
+4.0000000000e+00   +1.1000000000e+03
+6.0000000000e+00   +1.6000000000e+01   +1.2000000000e+03
+8.0000000000e+00   +1.8000000000e+01   +2.8000000000e+01   +1.3000000000e+03
+1.0000000000e+01   +2.0000000000e+01   +3.0000000000e+01   +4.0000000000e+01   +1.4000000000e+03
both 6x6 matrices:
+1.0000000000e+03
+4.0000000000e+00   +1.1000000000e+03
+6.0000000000e+00   +1.8000000000e+01   +1.2000000000e+03
+8.0000000000e+00   +2.0000000000e+01   +3.2000000000e+01   +1.3000000000e+03
+1.0000000000e+01   +2.2000000000e+01   +3.4000000000e+01   +4.6000000000e+01   +1.4000000000e+03
+1.2000000000e+01   +2.4000000000e+01   +3.6000000000e+01   +4.8000000000e+01   +6.0000000000e+01   +1.5000000000e+03

Testing system specs:

CPU: 500 MHz PentiumIII (Katmai)
Memory: 128MB SDRAM
Cache: 512KB
Hard Disk: IBM 13677MB
Video Card: 16MB Diamond Viper TNT 1.95E

OS: Fermi Linux Release 6.1.1 (Strange)
Kernel: 2.2.16-3 on an i686
X-Server: XFree86 Version 11.0 Release 3360

Tests were compiled and build using GCC 3.0.1