This Note is an extension of Safe Navigation vs Try in Rails (Part 1: Basic Differences)
Method try() comes from Active Support component of Ruby on Rails. Safe Navigation Operator is Ruby native feature.
Let's check performance!
require 'benchmark'
class Foo
attr_accessor :name
end
foo = Foo.new
bar = nil
Benchmark.bm(35) do |x|
x.report('Successful access: try(...): ') { 1_000_000.times { foo.try(:name) } }
x.report('Successful access: &.: ') { 1_000_000.times { foo&.name } }
x.report('Successful access: control sample: ') { 1_000_000.times { foo.name } }
x.report('Failed access: try(...): ') { 1_000_000.times { bar.try(:nonexistent) } }
x.report('Failed access: safe navigation: ') { 1_000_000.times { bar&.nonexistent } }
end;nil
user system total real
Successful access: try(...): 0.498216 0.005748 0.503964 ( 0.530010)
Successful access: &.: 0.062146 0.000943 0.063089 ( 0.069714)
Successful access: control sample: 0.062411 0.001098 0.063509 ( 0.069603)
Failed access: try(...): 0.172535 0.004374 0.176909 ( 0.194386)
Failed access: safe navigation: 0.054141 0.001029 0.055170 ( 0.065502)
Safe navigation is about 7 times faster than method try() for successful navigation and 3 times faster for unsuccessful.
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