(with numbers trunk)

$ csi -s cl-bench-bignum.scm 

run-elem-100-1000:
0.172s CPU time, 0.017s GC time (major), 42109 mutations, 15/924 GCs (major/minor)
-----------------------------
run-elem-1000-100:
0.275s CPU time, 0.082s GC time (major), 4309 mutations, 67/654 GCs (major/minor)
-----------------------------
run-elem-10000-1:
0.245s CPU time, 0.037s GC time (major), 151 mutations, 23/130 GCs (major/minor)
-----------------------------
run-pari-100-10:
0.017s CPU time, 0.001s GC time (major), 6184 mutations, 1/86 GCs (major/minor)
-----------------------------
run-pari-200-5:
0.046s CPU time, 0.005s GC time (major), 9109 mutations, 5/129 GCs (major/minor)
-----------------------------
run-pi-decimal/small:
0.108s CPU time, 0.011s GC time (major), 13976 mutations, 9/515 GCs (major/minor)
-----------------------------
run-pi-decimal/big:
1.087s CPU time, 0.267s GC time (major), 28000 mutations, 218/3080 GCs (major/minor)
-----------------------------
run-pi-pi-atan:
2.136s CPU time, 0.312s GC time (major), 538816 mutations, 252/7745 GCs (major/minor)





(with 'old' numbers)

$ csi -s cl-bench-bignum.scm 
run-elem-100-1000:
0.191s CPU time, 0.039s GC time (major), 42109 mutations, 31/908 GCs (major/minor)
-----------------------------
run-elem-1000-100:
0.267s CPU time, 0.069s GC time (major), 4309 mutations, 60/662 GCs (major/minor)
-----------------------------
run-elem-10000-1:
0.305s CPU time, 0.09s GC time (major), 151 mutations, 63/140 GCs (major/minor)
-----------------------------
run-pari-100-10:
0.017s CPU time, 0.001s GC time (major), 6184 mutations, 1/86 GCs (major/minor)
-----------------------------
run-pari-200-5:
0.045s CPU time, 0.007s GC time (major), 9109 mutations, 5/129 GCs (major/minor)
-----------------------------
run-pi-decimal/small:
0.105s CPU time, 0.015s GC time (major), 13976 mutations, 11/514 GCs (major/minor)
-----------------------------
run-pi-decimal/big:
1.117s CPU time, 0.287s GC time (major), 28000 mutations, 231/3073 GCs (major/minor)
-----------------------------
run-pi-pi-atan:
2.143s CPU time, 0.374s GC time (major), 538816 mutations, 302/7704 GCs (major/minor)