Avoid dozens of extra selects in seed_default_events #14722
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isimluk
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lpichler
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Apr 11, 2017
app/models/miq_event_definition.rb
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| @@ -123,6 +123,7 @@ def self.seed | |||
| end | |||
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| def self.seed_default_events | |||
| event_sets = MiqEventDefinitionSet.all.group_by(&:name) | |||
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isn't it operation on Array ?
what about to use sql ?
MiqEventDefinitionSet.group(:name)
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agh yes, I am sorry, it is not same, 😳 please ignore my comment
Fryguy
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Apr 11, 2017
app/models/miq_event_definition.rb
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| @@ -123,6 +123,7 @@ def self.seed | |||
| end | |||
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| def self.seed_default_events | |||
| event_sets = MiqEventDefinitionSet.all.group_by(&:name) | |||
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Is .index_by a better choice than .group_by ? Especially since you are doing a .first below?
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Amended. Great suggestion! Thanks!
and use common before section.
before calling seed_default_events, that will enable us to be more strict within the method -> more validations for db/fixtures Fail early, fail fast.
MiqEventDefinitionSet is static union. It is inefficient to use multiple
selects instead of a single one.
On my system `100.times { MiqEventDefinition.seed_default_events }`
gives
:gear: | rows | selects | time | %
------ | ----- | ------- | ---- | ---
Before | 16900 | 16900 | 204s | 100%
After | 1300 | 100 | 93s | 45%
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Checked commits isimluk/manageiq@0699939~...76d4220 with ruby 2.2.6, rubocop 0.47.1, and haml-lint 0.20.0 |
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MiqEventDefinitionSet is static union. It is inefficient to use multiple selects instead of a single one.
On my system
100.times { MiqEventDefinition.seed_default_events }gives