Description

amomchilov

opened on Jul 15, 2024

Issue body actions

It's one less allocation, too :)

	YJIT off	YJIT on
Set.new.compare_by_identity	2.571M	4.260M
S.dup	3.014M	4.999M
∆	1.17x	1.17x

	YJIT off	YJIT on
Hash.new.compare_by_identity	5.643M	8.208M
H.dup	5.988M	9.014M
∆	1.06x	1.09x

S = Set.new.compare_by_identity.freeze
H = Hash.new.compare_by_identity.freeze

Benchmark.ips do |x|
  x.config(time: 10)

  x.report(".new.compare_by_identity") do |times|
    i = 0
    while (i += 1) <= times
      S.dup
    end
  end
  
  x.report(".dup                    ") do |times|
    i = 0
    while (i += 1) <= times
      Set.new.compare_by_identity
    end
  end
  
  x.compare!
end

Benchmark.ips do |x|
  x.config(time: 10)
  
  x.report(".new.compare_by_identity") do |times|
    i = 0
    while (i += 1) <= times
      H.dup
    end
  end
  
  x.report(".dup                    ") do |times|
    i = 0
    while (i += 1) <= times
      Hash.new.compare_by_identity
    end
  end
  
  x.compare!
end

Activity

1. JuanVqz commented on Mar 7, 2025

   

   JuanVqz

   on Mar 7, 2025

   Member

   More actions

   @amomchilov could you please opne a PR?
2. BigwWinner commented on Aug 12, 2026

   

   BigwWinner

   on Aug 12, 2026

   More actions

   It's one less allocation, too :)

   YJIT off YJIT on
   Set.new.compare_by_identity 2.571M 4.260M
   S.dup 3.014M 4.999M
   ∆ 1.17x 1.17x
   YJIT off YJIT on
   Hash.new.compare_by_identity 5.643M 8.208M
   H.dup 5.988M 9.014M
   ∆ 1.06x 1.09x
   S = Set.new.compare_by_identity.freeze
   H = Hash.new.compare_by_identity.freeze

   Benchmark.ips do |x|
   x.config(time: 10)

   x.report(".new.compare_by_identity") do |times|
   i = 0
   while (i += 1) <= times
   S.dup
   end
   end

   x.report(".dup ") do |times|
   i = 0
   while (i += 1) <= times
   Set.new.compare_by_identity
   end
   end

   x.compare!
   end

   Benchmark.ips do |x|
   x.config(time: 10)

   x.report(".new.compare_by_identity") do |times|
   i = 0
   while (i += 1) <= times
   H.dup
   end
   end

   x.report(".dup ") do |times|
   i = 0
   while (i += 1) <= times
   Hash.new.compare_by_identity
   end
   end

   x.compare!
   end

Issue actions