Zero-cost oneshot line coverage in JRuby 9.3

gistfile1.txt

[] ~/projects/jruby $ jruby -Xcompile.invokedynamic -Xfixnum.cache=false -e 'load "../bench2018/bench_mandelbrot.rb"'
0.14059200000000002
0.14031
0.14225
0.139491
0.132145
0.143139
0.132212
0.134711
0.13967700000000002
0.13581300000000002
[5, 5, 5, 5, 5, 5, 5, 5, 5, 5]

[] ~/projects/jruby $ jruby -Xcompile.invokedynamic -Xfixnum.cache=false -rcoverage -e 'Coverage.start(oneshot_lines: true); load "../bench2018/bench_mandelbrot.rb"; p Coverage.result'
0.14324599999999998
0.13825
0.14143399999999998
0.13478
0.133028
0.138501
0.13390200000000002
0.141196
0.13159300000000002
0.13553300000000001
[5, 5, 5, 5, 5, 5, 5, 5, 5, 5]
{"/Users/headius/projects/bench2018/bench_mandelbrot.rb"=>[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70]}