diff options
Diffstat (limited to 'jni/ruby/benchmark/bm_so_partial_sums.rb')
-rw-r--r-- | jni/ruby/benchmark/bm_so_partial_sums.rb | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/jni/ruby/benchmark/bm_so_partial_sums.rb b/jni/ruby/benchmark/bm_so_partial_sums.rb new file mode 100644 index 0000000..630b45c --- /dev/null +++ b/jni/ruby/benchmark/bm_so_partial_sums.rb @@ -0,0 +1,31 @@ +n = 2_500_000 # (ARGV.shift || 1).to_i + +alt = 1.0 ; s0 = s1 = s2 = s3 = s4 = s5 = s6 = s7 = s8 = 0.0 + +1.upto(n) do |d| + d = d.to_f ; d2 = d * d ; d3 = d2 * d ; ds = Math.sin(d) ; dc = Math.cos(d) + + s0 += (2.0 / 3.0) ** (d - 1.0) + s1 += 1.0 / Math.sqrt(d) + s2 += 1.0 / (d * (d + 1.0)) + s3 += 1.0 / (d3 * ds * ds) + s4 += 1.0 / (d3 * dc * dc) + s5 += 1.0 / d + s6 += 1.0 / d2 + s7 += alt / d + s8 += alt / (2.0 * d - 1.0) + + alt = -alt +end + +if false + printf("%.9f\t(2/3)^k\n", s0) + printf("%.9f\tk^-0.5\n", s1) + printf("%.9f\t1/k(k+1)\n", s2) + printf("%.9f\tFlint Hills\n", s3) + printf("%.9f\tCookson Hills\n", s4) + printf("%.9f\tHarmonic\n", s5) + printf("%.9f\tRiemann Zeta\n", s6) + printf("%.9f\tAlternating Harmonic\n", s7) + printf("%.9f\tGregory\n", s8) +end |