Use strftime to convert DateTime to numeric
The native implementation of the seconds since the UNIX epoch in strftime is significantly faster than our method. Benchmark: ---------- require 'benchmark/ips' require 'date' require 'time' date = DateTime.civil(1253,7,6,20,4,0) Benchmark.ips do |x| x.report("strftime.to_i") { date.strftime('%s').to_i } x.report("ssue.to_i") { ((date - DateTime.civil(1970)) * 86400).to_i } x.report("strftime.to_f") { date.strftime('%s').to_f } x.report("ssue.to_f") { ((date - DateTime.civil(1970)) * 86400).to_f } end Output: ------- Calculating ------------------------------------- strftime.to_i 26480 i/100ms ssue.to_i 13818 i/100ms strftime.to_f 26561 i/100ms ssue.to_f 14479 i/100ms ------------------------------------------------- strftime.to_i 616937.3 (±2.4%) i/s - 3098160 in 5.024749s ssue.to_i 200108.8 (±6.9%) i/s - 994896 in 4.999278s strftime.to_f 553581.3 (±2.2%) i/s - 2788905 in 5.040397s ssue.to_f 204260.3 (±4.3%) i/s - 1028009 in 5.043072s
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