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https://travis-ci.org/JuanitoFatas/fast-ruby
https://github.com/pikturdev/fast-ruby/tree/master#fast-ruby-
Erik Michaels-Oberhttps://github.com/sferik
Video @ Baruco 2014https://www.youtube.com/watch?v=fGFM_UrSp70
Slidehttps://speakerdeck.com/sferik/writing-fast-ruby
codehttps://github.com/pikturdev/fast-ruby/blob/master/code
the travis buildhttps://travis-ci.org/JuanitoFatas/fast-ruby
https://github.com/pikturdev/fast-ruby/tree/master#analyze-your-code
fastererhttps://github.com/DamirSvrtan/fasterer
https://github.com/pikturdev/fast-ruby/tree/master#measurement-tool
benchmark-ipshttps://github.com/evanphx/benchmark-ips
https://github.com/pikturdev/fast-ruby/tree/master#template
https://github.com/pikturdev/fast-ruby/tree/master#idioms
https://github.com/pikturdev/fast-ruby/tree/master#index
Generalhttps://github.com/pikturdev/fast-ruby/tree/master#general
Arrayhttps://github.com/pikturdev/fast-ruby/tree/master#array
Datehttps://github.com/pikturdev/fast-ruby/tree/master#date
Enumerablehttps://github.com/pikturdev/fast-ruby/tree/master#enumerable
Hashhttps://github.com/pikturdev/fast-ruby/tree/master#hash
Proc & Blockhttps://github.com/pikturdev/fast-ruby/tree/master#proc--block
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https://github.com/pikturdev/fast-ruby/tree/master#parallel-assignment-vs-sequential-assignment-code
Read the rationale herehttps://github.com/JuanitoFatas/fast-ruby/pull/50#issue-98586885
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/general/attr-accessor-vs-getter-and-setter.rb
https://github.com/pikturdev/fast-ruby/tree/master#attr_accessor-vs-getter-and-setter-code
https://www.omniref.com/ruby/2.2.0/files/method.h?#annotation=4081781&line=47https://www.omniref.com/ruby/2.2.0/files/method.h#annotation=4081781&line=47
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/general/begin-rescue-vs-respond-to.rb
https://github.com/pikturdev/fast-ruby/tree/master#beginrescue-vs-respond_to-for-control-flow-code
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https://github.com/pikturdev/fast-ruby/tree/master#define_method-vs-module_eval-for-defining-methods-code
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https://github.com/pikturdev/fast-ruby/tree/master#raise-vs-e2mmraise-for-raising-and-defining-exeptions--code
Exception2MessageMapper modulehttp://ruby-doc.org/stdlib-2.2.0/libdoc/e2mmap/rdoc/index.html
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/general/loop-vs-while-true.rb
https://github.com/pikturdev/fast-ruby/tree/master#loop-vs-while-true-code
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/general/inheritance-check.rb
https://github.com/pikturdev/fast-ruby/tree/master#ancestorsinclude-vs--code
https://github.com/pikturdev/fast-ruby/tree/master#method-invocation
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https://github.com/pikturdev/fast-ruby/tree/master#call-vs-send-vs-method_missing-code
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https://github.com/pikturdev/fast-ruby/tree/master#normal-way-to-apply-method-vs-method-code
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https://github.com/pikturdev/fast-ruby/tree/master#function-with-single-array-argument-vs-splat-arguments-code
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https://github.com/pikturdev/fast-ruby/tree/master#hash-vs-openstruct-on-access-assuming-you-already-have-a-hash-or-an-openstruct-code
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/general/hash-vs-openstruct.rb
https://github.com/pikturdev/fast-ruby/tree/master#hash-vs-openstruct-creation-code
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https://github.com/pikturdev/fast-ruby/tree/master#kernelformat-vs-floatroundto_s-code
https://github.com/pikturdev/fast-ruby/tree/master#array
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https://github.com/pikturdev/fast-ruby/tree/master#arraybsearch-vs-arrayfind-code
#29https://github.com/JuanitoFatas/fast-ruby/issues/29
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/array/length-vs-size-vs-count.rb
https://github.com/pikturdev/fast-ruby/tree/master#arraylength-vs-arraysize-vs-arraycount-code
Note #size is an alias of #lengthhttps://github.com/ruby/ruby/blob/f8fb526ad9e9f31453bffbc908b6a986736e21a7/array.c#L5817-L5818
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/array/shuffle-first-vs-sample.rb
https://github.com/pikturdev/fast-ruby/tree/master#arrayshufflefirst-vs-arraysample-code
rails/rails#17245https://github.com/rails/rails/pull/17245
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/array/array-first-vs-index.rb
https://github.com/pikturdev/fast-ruby/tree/master#array0-vs-arrayfirst-code
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https://github.com/pikturdev/fast-ruby/tree/master#array-1-vs-arraylast-code
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https://github.com/pikturdev/fast-ruby/tree/master#arrayinsert-vs-arrayunshift-code
https://github.com/pikturdev/fast-ruby/tree/master#enumerable
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https://github.com/pikturdev/fast-ruby/tree/master#enumerableeach--push-vs-enumerablemap-code
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https://github.com/pikturdev/fast-ruby/tree/master#enumerableeach-vs-for-loop-code
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https://github.com/pikturdev/fast-ruby/tree/master#enumerableeach_with_index-vs-while-loop-code
rails/rails#12065https://github.com/rails/rails/pull/12065
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/enumerable/map-flatten-vs-flat_map.rb
https://github.com/pikturdev/fast-ruby/tree/master#enumerablemaparrayflatten-vs-enumerableflat_map-code
rails/rails@3413b88https://github.com/rails/rails/commit/3413b88
Replace map.flatten with flat_maphttps://github.com/rails/rails/commit/817fe31196dd59ee31f71ef1740122b6759cf16d
Replace map.flatten(1) with flat_maphttps://github.com/rails/rails/commit/b11ebf1d80e4fb124f0ce0448cea30988256da59
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/enumerable/reverse-each-vs-reverse_each.rb
https://github.com/pikturdev/fast-ruby/tree/master#enumerablereverseeach-vs-enumerablereverse_each-code
rails/rails#17244https://github.com/rails/rails/pull/17244
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/enumerable/sort_by-first-vs-min_by.rb
https://github.com/pikturdev/fast-ruby/tree/master#enumerablesort_byfirst-vs-enumerablemin_by-code
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/enumerable/select-first-vs-detect.rb
https://github.com/pikturdev/fast-ruby/tree/master#enumerabledetect-vs-enumerableselectfirst-code
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/enumerable/select-last-vs-reverse-detect.rb
https://github.com/pikturdev/fast-ruby/tree/master#enumerableselectlast-vs-enumerablereversedetect-code
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/enumerable/sort-vs-sort_by.rb
https://github.com/pikturdev/fast-ruby/tree/master#enumerablesort-vs-enumerablesort_by-code
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/enumerable/inject-symbol-vs-block.rb
https://github.com/pikturdev/fast-ruby/tree/master#enumerableinject-symbol-vs-enumerableinject-proc-code
https://github.com/pikturdev/fast-ruby/tree/master#date
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/date/iso8601-vs-parse.rb
https://github.com/pikturdev/fast-ruby/tree/master#dateiso8601-vs-dateparse-code
https://github.com/pikturdev/fast-ruby/tree/master#hash
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/hash/bracket-vs-fetch.rb
https://github.com/pikturdev/fast-ruby/tree/master#hash-vs-hashfetch-code
Symbol GC in Ruby 2.2http://www.sitepoint.com/symbol-gc-ruby-2-2/
Unraveling String Key Performance in Ruby 2.2http://www.sitepoint.com/unraveling-string-key-performance-ruby-2-2/
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/hash/dig-vs-%5B%5D-vs-fetch.rb
https://github.com/pikturdev/fast-ruby/tree/master#hashdig-vs-hash-vs-hashfetch-code
Ruby 2.3 introduced Hash#dighttp://ruby-doc.org/core-2.3.0/Hash.html#method-i-dig
#102 (comment)https://github.com/JuanitoFatas/fast-ruby/pull/102#issuecomment-198827506
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/hash/bracket-vs-dup.rb
https://github.com/pikturdev/fast-ruby/tree/master#hash-vs-hashdup-code
http://tenderlovemaking.com/2015/02/11/weird-stuff-with-hashes.htmlhttp://tenderlovemaking.com/2015/02/11/weird-stuff-with-hashes.html
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/hash/fetch-vs-fetch-with-block.rb
https://github.com/pikturdev/fast-ruby/tree/master#hashfetch-with-argument-vs-hashfetch--block-code
#39 (comment)https://github.com/JuanitoFatas/fast-ruby/issues/39#issuecomment-103989335
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/hash/keys-each-vs-each_key.rb
https://github.com/pikturdev/fast-ruby/tree/master#hasheach_key-instead-of-hashkeyseach-code
rails/rails#17099https://github.com/rails/rails/pull/17099
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/hash/keys-include-vs-%5B%5D-vs-key.rb
https://github.com/pikturdev/fast-ruby/tree/master#hashkey-instead-of-hashkeysinclude-code
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https://github.com/pikturdev/fast-ruby/tree/master#hashvalue-instead-of-hashvaluesinclude-code
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/hash/merge-bang-vs-%5B%5D=.rb
https://github.com/pikturdev/fast-ruby/tree/master#hashmerge-vs-hash-code
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/hash/merge-vs-double-splat-operator.rb
https://github.com/pikturdev/fast-ruby/tree/master#hashmerge-vs-hashother-code
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/hash/merge-vs-merge-bang.rb
https://github.com/pikturdev/fast-ruby/tree/master#hashmerge-vs-hashmerge-code
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/hash/merge-bang-vs-merge-vs-dup-merge-bang.rb
https://github.com/pikturdev/fast-ruby/tree/master#mergehash-vs-hashmerge-vs-hashdupmerge-code
#42https://github.com/JuanitoFatas/fast-ruby/pull/42#issue-93502261
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/hash/hash-key-sort_by-vs-sort.rb
https://github.com/pikturdev/fast-ruby/tree/master#hashsort_by-vs-hashsort-code
https://github.com/pikturdev/fast-ruby/tree/master#proc--block
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/proc-and-block/block-vs-to_proc.rb
https://github.com/pikturdev/fast-ruby/tree/master#block-vs-symbolto_proc-code
rails/rails#16833https://github.com/rails/rails/pull/16833
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/proc-and-block/proc-call-vs-yield.rb
https://github.com/pikturdev/fast-ruby/tree/master#proccall-and-block-arguments-vs-yieldcode
are converted to Procshttps://www.omniref.com/ruby/2.2.0/symbols/Proc/yield#annotation=4087638&line=711
https://github.com/pikturdev/fast-ruby/tree/master#string
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/string/dup-vs-unary-plus.rb
https://github.com/pikturdev/fast-ruby/tree/master#stringdup-vs-string-code
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/string/casecmp-vs-downcase-==.rb
https://github.com/pikturdev/fast-ruby/tree/master#stringcasecmp-vs-stringdowncase---code
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/string/concatenation.rb
https://github.com/pikturdev/fast-ruby/tree/master#string-concatenation-code
code (start)https://github.com/pikturdev/fast-ruby/blob/master/code/string/start-string-checking-match-vs-start_with.rb
code (end)https://github.com/pikturdev/fast-ruby/blob/master/code/string/end-string-checking-match-vs-end_with.rb
https://github.com/pikturdev/fast-ruby/tree/master#stringmatch-vs-stringmatch-vs-stringstart_withstringend_with-code-start-code-end
rails/rails#17316https://github.com/rails/rails/pull/17316
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/string/start_with-vs-substring-==.rb
https://github.com/pikturdev/fast-ruby/tree/master#stringstart_with-vs-string-code
code https://github.com/pikturdev/fast-ruby/blob/master/code/string/===-vs-=~-vs-match.rb
https://github.com/pikturdev/fast-ruby/tree/master#regexp-vs-stringmatch-vs-string-vs-stringmatch-code-
provideshttp://guides.rubyonrails.org/v5.1/active_support_core_extensions.html#match-questionmark
#59https://github.com/JuanitoFatas/fast-ruby/pull/59
#62https://github.com/JuanitoFatas/fast-ruby/pull/62
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/string/gsub-vs-sub.rb
https://github.com/pikturdev/fast-ruby/tree/master#stringgsub-vs-stringsub-vs-string-code
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/string/gsub-vs-tr.rb
https://github.com/pikturdev/fast-ruby/tree/master#stringgsub-vs-stringtr-code
rails/rails#17257https://github.com/rails/rails/pull/17257
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/string/mutable_vs_immutable_strings.rb
https://github.com/pikturdev/fast-ruby/tree/master#mutable-vs-immutable-code
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/string/sub!-vs-gsub!-vs-%5B%5D=.rb
https://github.com/pikturdev/fast-ruby/tree/master#stringsub-vs-stringgsub-vs-string-code
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/string/sub-vs-delete_prefix.rb
https://github.com/pikturdev/fast-ruby/tree/master#stringsub-vs-stringdelete_prefix-code
Ruby 2.5 introducedhttps://bugs.ruby-lang.org/issues/12694
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/string/sub-vs-chomp-vs-delete_suffix.rb
https://github.com/pikturdev/fast-ruby/tree/master#stringsub-vs-stringchomp-vs-stringdelete_suffix-code
Ruby 2.5 introducedhttps://bugs.ruby-lang.org/issues/13665
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/string/unpack1-vs-unpack%5B0%5D.rb
https://github.com/pikturdev/fast-ruby/tree/master#stringunpack1-vs-stringunpack0-code
Ruby 2.4.0 introduced unpack1https://bugs.ruby-lang.org/issues/12752
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/string/remove-extra-spaces-or-other-chars.rb
https://github.com/pikturdev/fast-ruby/tree/master#remove-extra-spaces-or-other-contiguous-characters-code
https://github.com/pikturdev/fast-ruby/tree/master#time
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/time/iso8601-vs-parse.rb
https://github.com/pikturdev/fast-ruby/tree/master#timeiso8601-vs-timeparse-code
https://github.com/pikturdev/fast-ruby/tree/master#range
codehttps://github.com/pikturdev/fast-ruby/blob/master/code/range/cover-vs-include.rb
https://github.com/pikturdev/fast-ruby/tree/master#cover-vs-include-code
https://github.com/pikturdev/fast-ruby/tree/master#less-idiomatic-but-with-significant-performance-ruby
https://github.com/JuanitoFatas/fast-ruby/wiki/Less-idiomatic-but-with-significant-performance-differencehttps://github.com/JuanitoFatas/fast-ruby/wiki/Less-idiomatic-but-with-significant-performance-difference
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