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2e43621806
Ref: https://github.com/ruby/json/issues/655 Rather than to write the number backward, and then reverse the buffer, we can start from the back of the buffer and write the number in the proper direction. Before: ``` == Encoding integers (8009 bytes) ruby 3.3.4 (2024-07-09 revision https://github.com/ruby/json/commit/be1089c8ec) +YJIT [arm64-darwin23] Warming up -------------------------------------- json 8.606k i/100ms oj 9.598k i/100ms Calculating ------------------------------------- json 86.059k (± 0.8%) i/s (11.62 μs/i) - 430.300k in 5.000416s oj 97.409k (± 0.6%) i/s (10.27 μs/i) - 489.498k in 5.025360s Comparison: json: 86058.8 i/s oj: 97408.8 i/s - 1.13x faster ``` After: ``` == Encoding integers (8009 bytes) ruby 3.3.4 (2024-07-09 revision https://github.com/ruby/json/commit/be1089c8ec) +YJIT [arm64-darwin23] Warming up -------------------------------------- json (reuse) 9.500k i/100ms json 9.359k i/100ms oj 9.722k i/100ms Calculating ------------------------------------- json (reuse) 96.270k (± 0.4%) i/s (10.39 μs/i) - 484.500k in 5.032777s json 94.800k (± 2.2%) i/s (10.55 μs/i) - 477.309k in 5.037495s oj 97.131k (± 0.7%) i/s (10.30 μs/i) - 486.100k in 5.004822s Comparison: json (reuse): 96270.1 i/s oj: 97130.5 i/s - same-ish: difference falls within error json: 94799.9 i/s - same-ish: difference falls within error ``` https://github.com/ruby/json/commit/0655b58d14