Use Gem fasterer to speed up your Ruby code.
May 12, 2020
Overview
Using Fasterer, you can suggest speed improvements for your Ruby code. The proposal can be found at Fast Ruby.
Install
Gemfile
group :development do
gem 'fasterer', require: false
end
$ bundle install
How to use
Inspection
$ bundle exec fasterer
Settings
Create .fastener.yml
in the root directory of the project.
$ touch .fasterer.yml
Describe the settings. You can see the detailed settings at here.
.fasterer.yml
speedups:
rescue_vs_respond_to: true
module_eval: true
shuffle_first_vs_sample: true
for_loop_vs_each: true
each_with_index_vs_while: false
map_flatten_vs_flat_map: true
reverse_each_vs_reverse_each: true
select_first_vs_detect: true
sort_vs_sort_by: true
fetch_with_argument_vs_block: true
keys_each_vs_each_key: true
hash_merge_bang_vs_hash_brackets: true
block_vs_symbol_to_proc: true
proc_call_vs_yield: true
gsub_vs_tr: true
select_last_vs_reverse_detect: true
getter_vs_attr_reader: true
setter_vs_attr_writer: true
exclude_paths:
- 'vendor/**/*.rb'
- 'db/schema.rb'
Working with overcommit
By linking fasterer
with overcommit, you can make sure that you don't forget to check fasterer
. If you haven't installed overcommit, please refer to How to install Git Hooks (overcommit) so that you don't forget to run rubocop to install it.
Add the following configuration to .overcommit.yml
. This will prevent you from committing if there is a warning in fasterer
.
.overcommit.yml
PreCommit:
Fasterer:
enabled: true
description: 'Analyzing for potential speed improvements'
command: ['bundle', 'exec', 'fasterer']