Ryuta Kamizono 8f2bb58ba2 PERF: Recover marshaling dump/load performance (#31827) ... * PERF: Recover marshaling dump/load performance This performance regression which is described in #30680 was caused by f0ddf87 due to force materialized `LazyAttributeHash`. Since 95b86e5, default proc has been removed in the class, so it is no longer needed that force materialized. Avoiding force materialized will recover marshaling dump/load performance. Benchmark: https://gist.github.com/blimmer/1360ea51cd3147bae8aeb7c6d09bff17 Before: ``` it took 0.6248569069430232 seconds to unmarshal the objects Total allocated: 38681544 bytes (530060 objects) allocated memory by class ----------------------------------- 12138848 Hash 10542384 String 7920000 ActiveModel::Attribute::Uninitialized 5600000 ActiveModel::Attribute::FromDatabase 1200000 Foo 880000 ActiveModel::LazyAttributeHash 400000 ActiveModel::AttributeSet 80 Integer 72 ActiveRecord::ConnectionAdapters::SQLite3Adapter::SQLite3Integer 40 ActiveModel::Type::String 40 ActiveRecord::Type::DateTime 40 Object 40 Range allocated objects by class ----------------------------------- 250052 String 110000 ActiveModel::Attribute::Uninitialized 70001 Hash 70000 ActiveModel::Attribute::FromDatabase 10000 ActiveModel::AttributeSet 10000 ActiveModel::LazyAttributeHash 10000 Foo 2 Integer 1 ActiveModel::Type::String 1 ActiveRecord::ConnectionAdapters::SQLite3Adapter::SQLite3Integer 1 ActiveRecord::Type::DateTime 1 Object 1 Range ``` After: ``` it took 0.1660824950085953 seconds to unmarshal the objects Total allocated: 13883811 bytes (220090 objects) allocated memory by class ----------------------------------- 5743371 String 4940008 Hash 1200000 Foo 880000 ActiveModel::LazyAttributeHash 720000 Array 400000 ActiveModel::AttributeSet 80 ActiveModel::Attribute::FromDatabase 80 Integer 72 ActiveRecord::ConnectionAdapters::SQLite3Adapter::SQLite3Integer 40 ActiveModel::Type::String 40 ActiveModel::Type::Value 40 ActiveRecord::Type::DateTime 40 Object 40 Range allocated objects by class ----------------------------------- 130077 String 50004 Hash 10000 ActiveModel::AttributeSet 10000 ActiveModel::LazyAttributeHash 10000 Array 10000 Foo 2 Integer 1 ActiveModel::Attribute::FromDatabase 1 ActiveModel::Type::String 1 ActiveModel::Type::Value 1 ActiveRecord::ConnectionAdapters::SQLite3Adapter::SQLite3Integer 1 ActiveRecord::Type::DateTime 1 Object 1 Range ``` Fixes #30680. * Keep the `@delegate_hash` to avoid to lose any mutations that have been made to the record		2018-02-02 07:52:33 +09:00
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active_model	PERF: Recover marshaling dump/load performance (#31827)	2018-02-02 07:52:33 +09:00
active_model.rb	Bump license years for 2018	2017-12-31 22:36:55 +09:00