I see that ViewVC link seems to have problems showing the diff at the moment, here are elapsed seconds (without invokedynamic and with invokedynamic)

jruby 1.7.0 (1.9.3p203) 2012-10-22 ff1ebbe on Java HotSpot(TM) Server VM 1.7.0_09-b05 [linux-i386]

    invoke-dynamic=	false	true
    binarytrees #1	290.08	252.55
    binarytrees #2	290.34	252.92
    binarytreesredux #2	289.64	262.04
    chameneosredux 31	39.85	32.73
    fannkuchredux #2	1720.70	1481.23
    fasta #6		372.59	418.07
    fasta #5		294.54	270.02
    fasta #1		278.98	260.14
    knucleotide #2	428.75	377.28
    knucleotide #1	470.40	461.46
    mandelbrot #3	1404.58	1149.08
    mandelbrot #1	2301.81	2167.50
    meteor #1		17.59	17.42
    meteor #2		13.19	13.37
    nbody #1		678.62	568.72
    pidigits #2		3.10	3.22
    pidigits #3		25.89	25.73
    pidigits #1		50.80	51.03
    regexdna #1		78.76	78.60
    regexdna #3		44.29	45.33
    revcomp #2		24.05	24.49
    spectralnorm #2	462.09	387.54
    spectralnorm #1	496.94	438.55

YMMV