Gem Netflix 發佈的 JSON Serializer，比 Active Model Serializer 的快二十多倍
Fast JSON API
A lightning fast JSON:API serializer for Ruby Objects.
Performance Comparison
We compare serialization times with Active Model Serializer as part of RSpec performance tests included on this library. We want to ensure that with every change on this library, serialization time is at least 25 times faster than Active Model Serializers on up to current benchmark of 1000 records. Please read the performance document for any questions related to methodology.
Benchmark times for 250 records
$ rspec
Active Model Serializer serialized 250 records in 138.71 ms
Fast JSON API serialized 250 records in 3.01 ms
We compare serialization times with Active Model Serializer as part of RSpec performance tests included on this library. We want to ensure that with every change on this library, serialization time is at least 25 times faster than Active Model Serializers on up to current benchmark of 1000 records. Please read the performance document for any questions related to methodology.
Rails 為了怕開發者受傷，做了很多保護開發者的事情 https://github.com/rails/rails/blob/64c88fb5d2caf3c34742a07394ac68b8377c4936/activesupport/lib/active_support/core_ext/object/json.rb
這造成有幾個 edge case 是 ActiveSupport::JSON::Encode 會過但是用 oj 時不會過。但是一般人應該沒在擔心這些 edge case 的。想必 netflix 的版本更不擔心。