bench.txt

Calculating -------------------------------------
         thread-safe    72.674k i/100ms
-------------------------------------------------
         thread-safe      2.128M (± 5.8%) i/s -     10.610M
Calculating -------------------------------------
       thread-unsafe   109.385k i/100ms
-------------------------------------------------
       thread-unsafe      5.545M (± 7.9%) i/s -     27.565M

thread_safe_bench.rb

require 'benchmark/ips'
require 'thread_safe/cache'

cache = ThreadSafe::Cache.new

Benchmark.ips do |x|
  x.report('thread-safe') { cache[:foo] = 42 }
end

# All MriCacheBackend methods are just synchronizing a mutex before calling the parent implementation
# In a non thread safe environment like Shopify, it is simply a waste of time.
%i(
  []= compute_if_absent compute_if_present compute merge_pair replace_pair
  replace_if_exists get_and_set delete delete_pair clear
).each do |method|
  ThreadSafe::MriCacheBackend.send(:define_method, method, ThreadSafe::NonConcurrentCacheBackend.instance_method(method))
end

Benchmark.ips do |x|
  x.report('thread-unsafe') { cache[:foo] = 42 }
end