From 5575bd7b22e8e11ba8e2fdac4a92aab931d4f9f9 Mon Sep 17 00:00:00 2001 From: Ryuta Kamizono Date: Mon, 22 Apr 2019 18:12:14 +0900 Subject: Avoid redundant `attribute_alias?` before `attribute_alias` MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit If we want to get alias resolved attribute finally, we can use `attribute_alias` directly. For that purpose, avoiding redundant `attribute_alias?` makes alias attribute access 40% faster. https://gist.github.com/kamipo/e427f080a27b46f50bc508fae3612a0e Before (2c0729d8): ``` Warming up -------------------------------------- user['id'] 102.668k i/100ms user['new_id'] 80.660k i/100ms user['name'] 99.368k i/100ms user['new_name'] 81.626k i/100ms Calculating ------------------------------------- user['id'] 1.431M (± 4.0%) i/s - 7.187M in 5.031985s user['new_id'] 1.042M (± 4.2%) i/s - 5.243M in 5.039858s user['name'] 1.406M (± 5.6%) i/s - 7.055M in 5.036743s user['new_name'] 1.074M (± 3.6%) i/s - 5.387M in 5.024152s ``` After (this change): ``` Warming up -------------------------------------- user['id'] 109.775k i/100ms user['new_id'] 103.303k i/100ms user['name'] 105.988k i/100ms user['new_name'] 99.618k i/100ms Calculating ------------------------------------- user['id'] 1.520M (± 6.7%) i/s - 7.574M in 5.011496s user['new_id'] 1.485M (± 6.2%) i/s - 7.438M in 5.036252s user['name'] 1.538M (± 5.4%) i/s - 7.737M in 5.049765s user['new_name'] 1.516M (± 4.6%) i/s - 7.571M in 5.007293s ``` --- activerecord/lib/active_record/table_metadata.rb | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'activerecord/lib/active_record/table_metadata.rb') diff --git a/activerecord/lib/active_record/table_metadata.rb b/activerecord/lib/active_record/table_metadata.rb index b67479fb6a..073866b894 100644 --- a/activerecord/lib/active_record/table_metadata.rb +++ b/activerecord/lib/active_record/table_metadata.rb @@ -12,9 +12,9 @@ module ActiveRecord def resolve_column_aliases(hash) new_hash = hash.dup - hash.each do |key, _| - if (key.is_a?(Symbol)) && klass.attribute_alias?(key) - new_hash[klass.attribute_alias(key)] = new_hash.delete(key) + hash.each_key do |key| + if key.is_a?(Symbol) && new_key = klass.attribute_aliases[key.to_s] + new_hash[new_key] = new_hash.delete(key) end end new_hash -- cgit v1.2.3