bench_strftime.rb

# frozen_string_literal: true

require 'benchmark/ips'
require 'logger'

puts RUBY_DESCRIPTION

logger = Logger.new(File::NULL)

Benchmark.ips do |x|
  x.config(:time => 30, :warmup => 30)

  x.report('Time.now.strftime') do
    Time.now.strftime("%Y-%m-%dT%H:%M:%S.%6N")
  end

  x.report('Logger#add') do
    logger.add(Logger::DEBUG, "benchmark a logger")
  end

  x.report('Logger#info') do
    logger.info("literally just something")
  end

end

result.txt

BEFORE:

system ~/work/jruby jruby-9.3 1562% jruby ../snippets/bench_strftime.rb 
Ignoring bcrypt-ruby-3.0.0-java because its extensions are not built. Try: gem pristine bcrypt-ruby --version 3.0.0
jruby 9.3.2.0-SNAPSHOT (2.6.8) 2021-11-15 a482e20f63 OpenJDK 64-Bit Server VM 25.242-b08 on 1.8.0_242-b08 +jit [linux-x86_64]
Warming up --------------------------------------
   Time.now.strftime    32.131k i/100ms
          Logger#add    14.096k i/100ms
         Logger#info    13.551k i/100ms
Calculating -------------------------------------
   Time.now.strftime    290.776k (± 3.0%) i/s -      8.740M in  30.085435s
          Logger#add    148.050k (± 5.1%) i/s -      4.440M in  30.083826s
         Logger#info    144.186k (± 3.3%) i/s -      4.323M in  30.016301s
system ~/work/jruby jruby-9.3 1563% jruby -Xcompile.invokedynamic ../snippets/bench_strftime.rb 
Ignoring bcrypt-ruby-3.0.0-java because its extensions are not built. Try: gem pristine bcrypt-ruby --version 3.0.0
jruby 9.3.2.0-SNAPSHOT (2.6.8) 2021-11-15 a482e20f63 OpenJDK 64-Bit Server VM 25.242-b08 on 1.8.0_242-b08 +indy +jit [linux-x86_64]
Warming up --------------------------------------
   Time.now.strftime    30.297k i/100ms
          Logger#add    16.859k i/100ms
         Logger#info    16.504k i/100ms
Calculating -------------------------------------
   Time.now.strftime    301.153k (± 2.9%) i/s -      9.029M in  30.006521s
          Logger#add    174.820k (± 4.7%) i/s -      5.243M in  30.072275s
         Logger#info    176.989k (± 3.5%) i/s -      5.314M in  30.068419s


AFTER:

jruby ../snippets/bench_strftime.rb 
Ignoring bcrypt-ruby-3.0.0-java because its extensions are not built. Try: gem pristine bcrypt-ruby --version 3.0.0
jruby 9.3.2.0-SNAPSHOT (2.6.8) 2021-11-15 f7df8d0a6d OpenJDK 64-Bit Server VM 25.242-b08 on 1.8.0_242-b08 +jit [linux-x86_64]
Warming up --------------------------------------
   Time.now.strftime   100.407k i/100ms
          Logger#add    23.699k i/100ms
         Logger#info    22.821k i/100ms
Calculating -------------------------------------
   Time.now.strftime    964.240k (± 2.7%) i/s -     28.917M in  30.013077s
          Logger#add    256.086k (± 3.2%) i/s -      7.678M in  30.018332s
         Logger#info    245.748k (± 3.1%) i/s -      7.371M in  30.026685s
system ~/work/jruby new_strftime 1571% jruby -Xcompile.invokedynamic ../snippets/bench_strftime.rb 
Ignoring bcrypt-ruby-3.0.0-java because its extensions are not built. Try: gem pristine bcrypt-ruby --version 3.0.0
jruby 9.3.2.0-SNAPSHOT (2.6.8) 2021-11-15 f7df8d0a6d OpenJDK 64-Bit Server VM 25.242-b08 on 1.8.0_242-b08 +indy +jit [linux-x86_64]
Warming up --------------------------------------
   Time.now.strftime   101.880k i/100ms
          Logger#add    31.154k i/100ms
         Logger#info    29.295k i/100ms
Calculating -------------------------------------
   Time.now.strftime    999.252k (± 2.5%) i/s -     29.953M in  29.993630s
          Logger#add    341.463k (± 3.5%) i/s -     10.250M in  30.072201s
         Logger#info    336.121k (± 2.6%) i/s -     10.077M in  30.003324s
         
MRI26:
mri26 ../snippets/bench_strftime.rb 
ruby 2.6.7p197 (2021-04-05 revision 67941) [x86_64-linux]
Warming up --------------------------------------
   Time.now.strftime    65.008k i/100ms
          Logger#add    13.641k i/100ms
         Logger#info    14.270k i/100ms
Calculating -------------------------------------
   Time.now.strftime    535.604k (± 2.0%) i/s -     16.122M in  30.113361s
          Logger#add    146.675k (± 2.0%) i/s -      4.406M in  30.052030s
         Logger#info    141.943k (± 2.9%) i/s -      4.267M in  30.087328s