Ruby 2.1.5 vs 2.2.0 Performance Benchmark

Ruby 2.2.0 released last christmas (yea, I give you my heart~), and I ain't got any news about it (thanks to Google Alert) -_-|||, ok then let's do the benchmark, yay! :3

Benchmark File	Input Size	ruby-2.1.5 p273	ruby-2.2.0 p0	Performance Increase
macro-benchmarks/bm_gzip.rb	100	5.441800787	5.529919291	-1.62%
macro-benchmarks/bm_hilbert_matrix.rb	10	0.001506644	0.001508498	-0.12%
macro-benchmarks/bm_hilbert_matrix.rb	20	0.018034514	0.019916750	-10.44%
macro-benchmarks/bm_hilbert_matrix.rb	30	0.084065866	0.088421611	-5.18%
macro-benchmarks/bm_hilbert_matrix.rb	40	0.243368739	0.257345416	-5.74%
macro-benchmarks/bm_hilbert_matrix.rb	50	0.656672931	0.665158535	-1.29%
macro-benchmarks/bm_hilbert_matrix.rb	60	1.483352925	1.499879964	-1.11%
macro-benchmarks/bm_mpart.rb	300	0.021045194	0.018580623	11.71%
macro-benchmarks/bm_norvig_spelling.rb	50	4.105601359	3.838181519	6.51%
macro-benchmarks/bm_parse_log.rb	100	0.524311824	0.534461600	-1.94%
macro-benchmarks/bm_rcs.rb	100	0.167349193	0.167786871	-0.26%
macro-benchmarks/bm_sudoku.rb	1	1.378527192	1.309769003	4.99%
micro-benchmarks/bm_app_factorial.rb	5000	0.018377852	0.016312503	11.24%
micro-benchmarks/bm_app_fib.rb	30	0.154745789	0.145133262	6.21%
micro-benchmarks/bm_app_fib.rb	35	1.723013699	1.651199102	4.17%
micro-benchmarks/bm_app_mandelbrot.rb	1	0.150893967	0.148029544	1.90%
micro-benchmarks/bm_app_pentomino.rb	1	20.916050147	20.219321355	3.33%
micro-benchmarks/bm_app_tak.rb	7	0.114274899	0.108184189	5.33%
micro-benchmarks/bm_app_tak.rb	8	0.332602074	0.311949329	6.21%
micro-benchmarks/bm_app_tak.rb	9	0.892592296	0.813961797	8.81%
micro-benchmarks/bm_app_tarai.rb	3	0.418669632	0.377954191	9.72%
micro-benchmarks/bm_app_tarai.rb	4	0.501545550	0.446574377	10.96%
micro-benchmarks/bm_app_tarai.rb	5	0.570404066	0.546178530	4.25%
micro-benchmarks/bm_binary_trees.rb	1	7.609491917	7.742826158	-1.75%
micro-benchmarks/bm_cal.rb	500	0.041128382	0.040977642	0.37%
micro-benchmarks/bm_count_multithreaded.rb	1	0.004324664	0.005010469	-15.86%
micro-benchmarks/bm_count_multithreaded.rb	2	0.009148898	0.010368676	-13.33%
micro-benchmarks/bm_count_multithreaded.rb	4	0.021764523	0.019279018	11.42%
micro-benchmarks/bm_count_multithreaded.rb	8	0.045679936	0.041301824	9.58%
micro-benchmarks/bm_count_multithreaded.rb	16	0.079268071	0.091182084	-15.03%
micro-benchmarks/bm_count_shared_thread.rb	1	0.040428474	0.042236155	-4.47%
micro-benchmarks/bm_count_shared_thread.rb	2	0.045402622	0.043319078	4.59%
micro-benchmarks/bm_count_shared_thread.rb	4	0.046338546	0.045935778	0.87%
micro-benchmarks/bm_count_shared_thread.rb	8	0.059489594	0.052797231	11.25%
micro-benchmarks/bm_count_shared_thread.rb	16	0.055508897	0.062376136	-12.37%
micro-benchmarks/bm_dirp.rb	10000	1.041128339	1.069316017	-2.71%
micro-benchmarks/bm_eval.rb	1000000	6.485932626	6.937864716	-6.97%
micro-benchmarks/bm_fannkuch.rb	6	0.001213466	0.001289357	-6.25%
micro-benchmarks/bm_fannkuch.rb	8	0.091404702	0.095585812	-4.57%
micro-benchmarks/bm_fannkuch.rb	10	11.697475867	12.100328001	-3.44%
micro-benchmarks/bm_fasta.rb	1000000	8.576651335	8.308239976	3.13%
micro-benchmarks/bm_ffi_printf.rb	100000	0.516967724	LoadError
micro-benchmarks/bm_fiber_ring.rb	10	0.000308344	0.000332843	-7.95%
micro-benchmarks/bm_fiber_ring.rb	100	0.013368638	0.011803480	11.71%
micro-benchmarks/bm_fiber_ring.rb	1000	1.942049853	1.503775298	22.57%
micro-benchmarks/bm_fractal.rb	5	0.589704152	0.539340453	8.54%
micro-benchmarks/bm_gc_array.rb	1	13.646902038	11.945846656	12.46%
micro-benchmarks/bm_gc_mb.rb	500000	0.138416534	0.099156060	28.36%
micro-benchmarks/bm_gc_mb.rb	1000000	0.245671563	0.181434410	26.15%
micro-benchmarks/bm_gc_mb.rb	3000000	0.768378183	0.668100862	13.05%
micro-benchmarks/bm_gc_string.rb	1	2.618494607	2.556772318	2.36%
micro-benchmarks/bm_knucleotide.rb	1	0.523677831	0.517581241	1.16%
micro-benchmarks/bm_list.rb	1000	0.024172078	0.019861599	17.83%
micro-benchmarks/bm_list.rb	10000	0.906083771	0.869684240	4.02%
micro-benchmarks/bm_lucas_lehmer.rb	9689	0.523225807	0.518668121	0.87%
micro-benchmarks/bm_lucas_lehmer.rb	9941	0.562339636	0.553851605	1.51%
micro-benchmarks/bm_lucas_lehmer.rb	11213	0.750138474	0.736377808	1.83%
micro-benchmarks/bm_lucas_lehmer.rb	19937	2.921622909	2.917808062	0.13%
micro-benchmarks/bm_mandelbrot.rb	1	7.568357616	7.282273656	3.78%
micro-benchmarks/bm_mbari_bogus1.rb	1	0.019700559	0.020653362	-4.84%
micro-benchmarks/bm_mergesort.rb	1	0.429642351	0.404129411	5.94%
micro-benchmarks/bm_mergesort_hongli.rb	3000	0.676850926	0.673826003	0.45%
micro-benchmarks/bm_meteor_contest.rb	1	3.805291502	3.630069959	4.60%
micro-benchmarks/bm_monte_carlo_pi.rb	10000000	2.359449302	2.196967268	6.89%
micro-benchmarks/bm_nbody.rb	100000	0.898108469	0.897828268	0.03%
micro-benchmarks/bm_nsieve.rb	9	2.177539100	2.056355906	5.57%
micro-benchmarks/bm_observ.rb	100000	0.300629705	0.268134252	10.81%
micro-benchmarks/bm_open_many_files.rb	50000	0.234240497	0.200070046	14.59%
micro-benchmarks/bm_partial_sums.rb	2500000	3.175624789	2.966665119	6.58%
micro-benchmarks/bm_pathname.rb	100	28.866053656	29.000798768	-0.47%
micro-benchmarks/bm_pi.rb	1000	0.031816670	0.028837649	9.36%
micro-benchmarks/bm_pi.rb	10000	2.793874224	2.728208813	2.35%
micro-benchmarks/bm_primes.rb	3000	0.000884100	0.000834377	5.62%
micro-benchmarks/bm_primes.rb	30000	0.007950027	0.008346128	-4.98%
micro-benchmarks/bm_primes.rb	300000	0.077019855	0.078940931	-2.49%
micro-benchmarks/bm_primes.rb	3000000	0.774730695	0.765232657	1.23%
micro-benchmarks/bm_quicksort.rb	1	0.975718723	1.005529795	-3.06%
micro-benchmarks/bm_read_large.rb	100	1.445822904	1.433691285	0.84%
micro-benchmarks/bm_regex_dna.rb	20	1.664740585	1.492710180	10.33%
micro-benchmarks/bm_reverse_complement.rb	1	2.260494686	2.219066674	1.83%
micro-benchmarks/bm_simple_connect.rb	1	0.000132251	0.000116141	12.18%
micro-benchmarks/bm_simple_connect.rb	100	0.003311302	0.003090082	6.68%
micro-benchmarks/bm_simple_connect.rb	500	0.016338940	0.015020540	8.07%
micro-benchmarks/bm_simple_server.rb	1	0.000133503	0.000155542	-16.51%
micro-benchmarks/bm_simple_server.rb	100	0.000969707	0.000846978	12.66%
micro-benchmarks/bm_simple_server.rb	100000	0.729301984	0.658444843	9.72%
micro-benchmarks/bm_so_ackermann.rb	7	0.040541865	0.038593147	4.81%
micro-benchmarks/bm_so_ackermann.rb	9	0.649686458	0.608577279	6.33%
micro-benchmarks/bm_so_array.rb	9000	0.982821222	0.947042115	3.64%
micro-benchmarks/bm_so_count_words.rb	100	1.870193048	1.748334946	6.52%
micro-benchmarks/bm_so_exception.rb	500000	1.238312823	1.149542351	7.17%
micro-benchmarks/bm_so_lists.rb	1000	2.198686097	2.114709163	3.82%
micro-benchmarks/bm_so_lists_small.rb	1000	0.453313595	0.432864767	4.51%
micro-benchmarks/bm_so_matrix.rb	60	0.310554994	0.308662303	0.61%
micro-benchmarks/bm_so_object.rb	500000	0.244054583	0.254701496	-4.36%
micro-benchmarks/bm_so_object.rb	1000000	0.510160533	0.523120809	-2.54%
micro-benchmarks/bm_so_object.rb	1500000	0.786008195	0.787754481	-0.22%
micro-benchmarks/bm_so_sieve.rb	4000	4.926280142	4.693643955	4.72%
micro-benchmarks/bm_socket_transfer_1mb.rb	10000	0.138346571	0.077399967	44.05%
micro-benchmarks/bm_socket_transfer_1mb.rb	1000000	0.138263657	0.078234789	43.42%
micro-benchmarks/bm_socket_transfer_1mb_noblock.rb	10000	0.144179379	0.078645168	45.45%
micro-benchmarks/bm_socket_transfer_1mb_noblock.rb	1000000	0.136524679	0.076419931	44.02%
micro-benchmarks/bm_spectral_norm.rb	100	0.087557986	0.086901845	0.75%
micro-benchmarks/bm_string_concat.rb	10000000	1.572824759	1.396739485	11.20%
micro-benchmarks/bm_sum_file.rb	100	2.483852444	2.512043986	-1.13%
micro-benchmarks/bm_word_anagrams.rb	1	2.299233762	2.214820932	3.67%
micro-benchmarks/bm_write_large.rb	100	0.094776340	0.085387468	9.91%
rdoc/bm_rdoc_against_itself_darkfish.rb	1	5.156284378	4.492923306	12.87%
rdoc/bm_rdoc_against_itself_ri.rb	1	4.397700124	4.010792575	8.80%

So, as we could see, ruby-2.2.0 does bring new performance increase, especially in Socket and GCs.