Benchmark: timing 500 iterations of Way1A, Way2A, Way2B, Way3A, Way4A, Way4B, Way5A, Way5B, Way6A...
     Way1A: 48 wallclock secs ( 0.52 usr +  0.16 sys =  0.68 CPU) @ 734.21/s (n=500)
     Way2A: 26 wallclock secs ( 0.75 usr +  0.03 sys =  0.78 CPU) @ 640.20/s (n=500)
     Way2B: 29 wallclock secs ( 0.69 usr +  0.08 sys =  0.77 CPU) @ 648.51/s (n=500)
     Way3A:  5 wallclock secs ( 0.52 usr +  0.04 sys =  0.56 CPU) @ 891.27/s (n=500)
     Way4A:  3 wallclock secs ( 0.58 usr +  0.05 sys =  0.63 CPU) @ 792.39/s (n=500)
     Way4B:  3 wallclock secs ( 0.72 usr +  0.09 sys =  0.81 CPU) @ 616.52/s (n=500)
     Way5A: 28 wallclock secs ( 0.50 usr +  0.05 sys =  0.55 CPU) @ 907.44/s (n=500)
     Way5B: 30 wallclock secs ( 0.56 usr +  0.04 sys =  0.60 CPU) @ 833.33/s (n=500)
     Way6A: 61 wallclock secs ( 0.62 usr +  0.15 sys =  0.77 CPU) @ 647.67/s (n=500)
       Rate Way4B Way2A Way6A Way2B Way1A Way4A Way5B Way3A Way5A
Way4B 617/s    --   -4%   -5%   -5%  -16%  -22%  -26%  -31%  -32%
Way2A 640/s    4%    --   -1%   -1%  -13%  -19%  -23%  -28%  -29%
Way6A 648/s    5%    1%    --   -0%  -12%  -18%  -22%  -27%  -29%
Way2B 649/s    5%    1%    0%    --  -12%  -18%  -22%  -27%  -29%
Way1A 734/s   19%   15%   13%   13%    --   -7%  -12%  -18%  -19%
Way4A 792/s   29%   24%   22%   22%    8%    --   -5%  -11%  -13%
Way5B 833/s   35%   30%   29%   29%   14%    5%    --   -6%   -8%
Way3A 891/s   45%   39%   38%   37%   21%   12%    7%    --   -2%
Way5A 907/s   47%   42%   40%   40%   24%   15%    9%    2%    --

Sybase performance values:

Engine Busy Utilization 
  Engine 0                        6.2 %                                      

Inserts
  APL Heap Table                  7875

Total Lock Requests               84663