bench1 (1000000 iterations & table size, nanosecond grain)
eqv? hash-table w/ fixnum keys & values (Not the eq? "fast" path)
(Which apparently is worth a 1.055 speedup. Woo)
                     Ref        Set!            Relative (+ better)
         srfi-69 ... 181.4218	820.1331	1.0	1.0
  srfi.69.strong ... 170.5941	309.0604	1.0635	2.6536
srfi.69.weak.fix ... 181.0729	402.3872	1.0019	2.0382
srfi.69.weak.var ... 189.0502	251.5574	0.9596	3.2602