If we have a proc, we can pass it directly to the `select!` method
instead of having to manually call the selector. This gives a
significant speedup for the common case of simple selectors:
require 'benchmark/ips'
Benchmark.ips do |x|
selector = ->(value) { value < 500 }
values = (1..1000).to_a
x.report("call") { values.select { |v| selector.call(v) } }
x.report("block") { values.select(&selector) }
x.compare!
end
Warming up --------------------------------------
call 663.000 i/100ms
block 1.598k i/100ms
Calculating -------------------------------------
call 6.897k (± 4.8%) i/s - 34.476k in 5.011617s
block 16.561k (± 4.2%) i/s - 83.096k in 5.026999s
Comparison:
block: 16560.7 i/s
call: 6896.5 i/s - 2.40x slower
