| Commit message (Collapse) | Author | Age | Files | Lines |
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We introduced a performance hit by adding an additional iteration
through a model's attributes on creation. We don't actually need the
values from `Result` to be a hash, we can separate the columns and
values and zip them up ourself during the iteration that we have to do.
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Benchmark:
```ruby
require 'objspace'
require 'active_record'
ActiveRecord::Base.establish_connection adapter: "sqlite3",
database: ":memory:"
ActiveRecord::Base.connection.instance_eval do
create_table(:articles) { |t| t.string :name }
end
class Article < ActiveRecord::Base; end
a = Article.create name: "foo"
a = Article.find a.id
N = 10
ObjectSpace::AllocationTracer.trace do
N.times { Article.find a.id }
end
ObjectSpace::AllocationTracer.allocated_count_table
table.sort_by { |_,x| x }.each do |k,v|
p k => (v / N)
end
```
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This allows using polymorphism for the uninitialized attributes raising
an exception behavior.
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This will make it less painful to add additional properties, which
should persist across writes, such as `name`.
Conflicts:
activerecord/lib/active_record/attribute_set.rb
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Moved `Builder` to its own file, as it started looking very weird once I
added private methods to the `AttributeSet` class and the `Builder`
class started to grow.
Would like to refactor `fetch_value` to change to
```ruby
self[name].value(&block)
```
But that requires the attributes to know about their name, which they
currently do not.
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