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Bug #10003
closedHash#fetch performance issue
Description
It looks like there is a performance issue with Hash#fetch compared to Hash#[]. I found this issue via this gist: https://gist.github.com/jonleighton/3552829. I could not find it reported anywhere on the tracker, forgive me if this is a known issue:
require 'benchmark/ips'
h = { foo: :bar }
Benchmark.ips do |r|
r.report('#[]') { h[:foo] }
r.report('#fetch') { h.fetch(:foo) }
end
Calculating -------------------------------------
#[] 124893 i/100ms
#fetch 121729 i/100ms
-------------------------------------------------
#[] 6917857.4 (±20.4%) i/s - 32472180 in 5.008832s
#fetch 4570251.5 (±18.8%) i/s - 22032949 in 5.015712s
This is in Ruby 2.1.2
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