Note where we currently stand, what the current bottlencks are and what could or can't be done. ``` == Encoding small nested array (121 bytes) ruby 3.3.4 (2024-07-09 revision https://github.com/ruby/json/commit/be1089c8ec) [arm64-darwin23] Warming up -------------------------------------- json 129.145k i/100ms json (reuse) 239.395k i/100ms oj 211.514k i/100ms rapidjson 130.660k i/100ms Calculating ------------------------------------- json 1.284M (± 0.3%) i/s (779.11 ns/i) - 6.457M in 5.030954s json (reuse) 2.405M (± 0.1%) i/s (415.77 ns/i) - 12.209M in 5.076202s oj 2.118M (± 0.0%) i/s (472.11 ns/i) - 10.787M in 5.092795s rapidjson 1.325M (± 1.3%) i/s (754.82 ns/i) - 6.664M in 5.030763s Comparison: json: 1283514.8 i/s json (reuse): 2405175.0 i/s - 1.87x faster oj: 2118132.9 i/s - 1.65x faster rapidjson: 1324820.8 i/s - 1.03x faster == Encoding small hash (65 bytes) ruby 3.3.4 (2024-07-09 revision https://github.com/ruby/json/commit/be1089c8ec) [arm64-darwin23] Warming up -------------------------------------- json 177.502k i/100ms json (reuse) 485.963k i/100ms oj 656.566k i/100ms rapidjson 227.985k i/100ms Calculating ------------------------------------- json 1.774M (± 3.1%) i/s (563.67 ns/i) - 8.875M in 5.007964s json (reuse) 4.804M (± 3.0%) i/s (208.16 ns/i) - 24.298M in 5.062426s oj 6.564M (± 1.9%) i/s (152.36 ns/i) - 32.828M in 5.003539s rapidjson 2.229M (± 2.0%) i/s (448.59 ns/i) - 11.171M in 5.013299s Comparison: json: 1774084.6 i/s oj: 6563547.8 i/s - 3.70x faster json (reuse): 4804083.0 i/s - 2.71x faster rapidjson: 2229209.5 i/s - 1.26x faster == Encoding twitter.json (466906 bytes) ruby 3.3.4 (2024-07-09 revision https://github.com/ruby/json/commit/be1089c8ec) [arm64-darwin23] Warming up -------------------------------------- json 212.000 i/100ms oj 222.000 i/100ms rapidjson 109.000 i/100ms Calculating ------------------------------------- json 2.135k (± 0.7%) i/s (468.32 μs/i) - 10.812k in 5.063665s oj 2.219k (± 1.9%) i/s (450.69 μs/i) - 11.100k in 5.004642s rapidjson 1.093k (± 3.8%) i/s (914.66 μs/i) - 5.559k in 5.090812s Comparison: json: 2135.3 i/s oj: 2218.8 i/s - 1.04x faster rapidjson: 1093.3 i/s - 1.95x slower == Encoding citm_catalog.json (500298 bytes) ruby 3.3.4 (2024-07-09 revision https://github.com/ruby/json/commit/be1089c8ec) [arm64-darwin23] Warming up -------------------------------------- json 132.000 i/100ms oj 126.000 i/100ms rapidjson 96.000 i/100ms Calculating ------------------------------------- json 1.304k (± 2.2%) i/s (766.96 μs/i) - 6.600k in 5.064483s oj 1.272k (± 0.8%) i/s (786.14 μs/i) - 6.426k in 5.052044s rapidjson 997.370 (± 4.8%) i/s (1.00 ms/i) - 4.992k in 5.016266s Comparison: json: 1303.9 i/s oj: 1272.0 i/s - same-ish: difference falls within error rapidjson: 997.4 i/s - 1.31x slower == Encoding canada.json (2090234 bytes) ruby 3.3.4 (2024-07-09 revision https://github.com/ruby/json/commit/be1089c8ec) [arm64-darwin23] Warming up -------------------------------------- json 2.000 i/100ms oj 3.000 i/100ms rapidjson 1.000 i/100ms Calculating ------------------------------------- json 20.001 (± 0.0%) i/s (50.00 ms/i) - 102.000 in 5.100950s oj 30.823 (± 0.0%) i/s (32.44 ms/i) - 156.000 in 5.061333s rapidjson 19.446 (± 0.0%) i/s (51.42 ms/i) - 98.000 in 5.041884s Comparison: json: 20.0 i/s oj: 30.8 i/s - 1.54x faster rapidjson: 19.4 i/s - 1.03x slower == Encoding many #to_json calls (2661 bytes) oj does not match expected output. Skipping rapidjson unsupported (Invalid object key type: Object) ruby 3.3.4 (2024-07-09 revision https://github.com/ruby/json/commit/be1089c8ec) [arm64-darwin23] Warming up -------------------------------------- json 2.200k i/100ms Calculating ------------------------------------- json 22.253k (± 0.2%) i/s (44.94 μs/i) - 112.200k in 5.041962s ``` https://github.com/ruby/json/commit/77e97b3d4e