| Commit message (Collapse) | Author | Age | Files | Lines |
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The methods Hash#transform_values and Hash#transform_values! have been
implemented in Ruby and they'll be available as part of the standard
library.
Here's the link to the discussion in Ruby's issue tracker:
https://bugs.ruby-lang.org/issues/12512
These methods are implemented in C so they're expected to perform
better.
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Updated docs for transform_keys & transform_values
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We're calling this function on an empty hash as part of copying the
attribute set during dirty checking initialization. The new structure
caused a performance regression on loading records from the database.
This causes `User.all.to_a` to perform about 10% faster w/ 10k records.
Calculating -------------------------------------
User.all - master 9.000 i/100ms
User.all - sg-fix-ar-regression
8.000 i/100ms
-------------------------------------------------
User.all - master 81.236 (± 7.4%) i/s - 405.000
User.all - sg-fix-ar-regression
89.716 (± 7.8%) i/s - 448.000
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Didn't get a chance to convert existing code, I'll skim through the code
base to make use of this later this afternoon.
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