SHELX benchmark tests
                                                               SHELXS           SHELXL
                                                         ----------------   ---------------  times   VAX unit
                                                         log2000  cumos10    6rxn     7rxn   (sec)    (MIPS?)

HP ENVY Phoenix 810-380jp
Core i7-4790 3.60GHz / 16GB / SSD / Windows 8.1 update
  Shelx_win64 (2014)                                       0.5      0.7      0.94     0.62     2.76    72,464
  Precompiled distribution (2009)                          1.0      1.6      1.9      2.1      6.6     30,303
  
Core i7 975EE 3.3GHz / 6GB / SSD (HP Pavilion e9190jp)
  Precompiled distribution (2006)                          2.32     1.14     2.36     3.70     9.52    21,008
  Compiled by gcc-fortran                                  1.80     1.30     2.50     3.80     9.40    21,278
  Compiled by intel-complier64 (11.1-046)                  0.70     0.60     1.20     1.50     4.00    50,000

AMD Sempron 3500+ / 896 MB (DELL note Latitude D531)
  Distribution (19-Jan-2005)                               3.47     2.90     3.70     6.83    16.90    11,834<-+
                                                                                                               |
Intel mac mini OSX 10.5 Core 2 - 2.0GHz/2GB                                                                    |
  Compiled by gfortran on intel mac                        10.9     4.2      12.5     18.3     45.9     4,444  |-- same !
  Distribution (19-Jan-2005 for PPC)                       21.1     15.9     28.2     40.0    105.2     1,901  |
                                                                                                               |
Core2 6420 2.13GHz/1GB Windows XP (EPSON Endevor)                                                              |
                                                            4.6     2.1       4.3      6.5     17.5    11,428<-+

PowerPC G4 (2.1) OSX 10.3 933 MHz/1GB
  Compiled by g77 -O2                                      25.0     2.8      30.0     36.3     94.1     2,125
  Distribution (19-Jan-2005)                               11.3     9.0      24.0     36.9     70.1     2,853

P4 3GHz/1GB Windows XP  Effect of Hyper-Thread (HP d530)
  HT disable / pre-compiled distribution (2003)             3.2     3.5       3.5      5.5     15.7    12,739
  HT enable  / pre-compiled distribution (2003)             3.2     3.5       3.5      5.5     15.7    12,739
  HT disable / old distribution (2000?)                     9.1     4.1       7.9     13.8     34.9     5,731
  HT enable  / old distribution (2000?)                     9.0     4.1       7.9     13.7     34.7     5,764

P4 3.06GHz/Linux Intel compiler
  Complied by v.7.1/IA32                                    3.1     2.8       3.4      5.5     14.8    13,514
  Distribution (2003)                                       3.2     2.9       3.4      5.6     15.1    13,245<-+
                                                                                                               |
P4 3.06GHz/Linux g77 compiler                                                                                  |
  g77 -O0                                                  11.1      6.9     12.7     14.4     45.1     4,435  |-- 2 times !
  g77 -O                                                    6.4      6.3     10.6      9.1     32.4     6,173  |
  g77 -O2                                                   6.8      6.6     10.8     10.5     34.7     5,764  |
  Precompiled distribution (2000?)                          5.9      4.3      9.3     10.6     30.1     6,645<-+ 

Pentium-III 1GHz/Linux
  g77 -O0                                                  31.1     17.8     41.4     64.7    155.0     1,290
  g77 -O                                                   19.8     14.9     30.9     46.3    111.9     1,787
  g77 -O2                                                  18.8     14.2     29.7     45.5    108.2     1,848
  Precompiled distribution (2000?)                         17.7      8.7     28.3     45.0     99.7     2,006

VT6 Alpha/Linux (21264/667MHz; memory 1GB)
 g77                                                      152.7     76.8    152.1    100.2    481.8       415<-+
 g77 -O                                                    91.9     59.1    113.5     57.4    321.9       621  |
 g77 -O2                                                   91.7     58.1    111.7     55.2    316.7       632  |
 g77 -O3                                                   92.1     59.0    112.8     55.0    318.9       627  |  1
 fort only  (fort is a Compaq compiler for Alpha)          10.7      7.1     16.6     25.6     60.0     3,333  |  0
 fort -O                                                   10.6      7.1     16.0     25.2     58.9     3,396  |   
 fort -O2                                                  13.5      8.0     17.3     29.5     68.3     2,928  |  t
 fort -O5                                                   9.9      7.0     16.7     26.1     59.7     3,350  |--i
 fort -tune ev6                                            10.2      7.2     13.6     19.5     50.5     3,960  |  m
 fort -arch ev6                                             9.2      7.2     13.3     19.5     49.2     4,065  |  e
 fort -arch ev6 -tune e6                                    9.6      7.2     13.3     19.3     49.4     4,049  |  s
 fort -arch ev6 -tune e6 -math_library fast                10.0      7.2     13.3     19.3     49.8     4,016  |  !
 fort -fast -arch ev6 -tune e6 -math_library fast           9.4      7.2     13.6     18.1     48.3     4,141  |
 fort -O5 -arch ev6 -tune e6 -math_library fast             8.8      6.6     13.1     19.0     47.5     4,211  |
 fort -O5 -fast -arch ev6 -tune e6 -math_library fast       8.8      6.7     13.1     17.9     46.5     4,301<-+

  . . . . . . 

SHELX home page lists (old)
 800MHz Athlon / W98 Lahey F95                             33.3     12.6     27.1     48.2    121.2     1650
 800MHz Pentium-III/Linux PGF77                            22.5     13.8     27.8     50.5    114.6     1745
 800MHz Athlon / Linux PGF77                               22.3     15.4     25.7     44.5    107.9     1854
 300MHz SGI R12000 IRIX 6.5                                16.5      7.5     25.1     42.8     91.9     2176
 500MHz AXP 21264 / True64UNIX                             12.9     10.1     17.2     23.1     63.3     3160