Gauche benchmark 0.9.7

Result

$ scheme-env run gauche@0.9.7 bench-gauche.scm
Benchmark: ran equal?, loop, sym, each for 10000 times.
  equal?: 0.032 real,  0.030 cpu ( 0.030 user + 0.000 sys)@333333.33/s n=10000
    loop: 0.463 real,  0.470 cpu ( 0.470 user + 0.000 sys)@ 21276.60/s n=10000
     sym: 8.174 real, 13.350 cpu (12.210 user + 1.140 sys)@   749.06/s n=10000

             Rate equal?   loop     sym
  equal? 333333/s     -- 15.667 445.000
    loop  21277/s  0.064     --  28.404
     sym    749/s  0.002  0.035      --