diff options
Diffstat (limited to 'activerecord')
| -rw-r--r-- | activerecord/lib/active_record/attribute_methods/read.rb | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/activerecord/lib/active_record/attribute_methods/read.rb b/activerecord/lib/active_record/attribute_methods/read.rb index 2c8ae9c774..8b3df3cd07 100644 --- a/activerecord/lib/active_record/attribute_methods/read.rb +++ b/activerecord/lib/active_record/attribute_methods/read.rb @@ -33,8 +33,11 @@ module ActiveRecord protected # We want to generate the methods via module_eval rather than - # define_method, because define_method is slower on dispatch and - # uses more memory (because it creates a closure). + # define_method, because define_method is slower on dispatch. + # Evaluating many similar methods may use more memory as the instruction + # sequences are duplicated and cached (in MRI). define_method may + # be slower on dispatch, but if you're careful about the closure + # created, then define_method will consume much less memory. # # But sometimes the database might return columns with # characters that are not allowed in normal method names (like |