Benchmark: running tp_for, tp_map for at least 2 CPU seconds...
    tp_for:  2 wallclock secs ( 1.81 usr +  0.24 sys =  2.05 CPU) @ 11155.46/s (n=22891)
    tp_map:  3 wallclock secs ( 1.96 usr +  0.23 sys =  2.19 CPU) @ 10615.60/s (n=23280)
          Rate tp_map tp_for
tp_map 10616/s     --    -5%
tp_for 11155/s     5%     --

This is perl, v5.8.0 built for MSWin32-x86-multi-thread

##</code><code>##

Benchmark: running tp_for, tp_map for at least 2 CPU seconds...
    tp_for:  2 wallclock secs ( 2.02 usr +  0.28 sys =  2.30 CPU) @ 35695.65/s (n=82100)
    tp_map:  2 wallclock secs ( 1.80 usr +  0.30 sys =  2.10 CPU) @ 39710.48/s (n=83392)
          Rate tp_for tp_map
tp_for 35696/s     --   -10%
tp_map 39710/s    11%     --

This is perl, v5.8.4 built for i486-linux