[jboss-jira] [JBoss JIRA] (DROOLS-3056) [DMN Designer] Data Types - List View Performance - The view items take ~100ms to be instantiated

[Guilherme Carreiro (Jira)]

     [ https://issues.jboss.org/browse/DROOLS-3056?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Guilherme Carreiro updated DROOLS-3056:
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    Story Points: 5  (was: 3)


> [DMN Designer] Data Types - List View Performance - The view items take ~100ms to be instantiated
> -------------------------------------------------------------------------------------------------
>
>                 Key: DROOLS-3056
>                 URL: https://issues.jboss.org/browse/DROOLS-3056
>             Project: Drools
>          Issue Type: Enhancement
>          Components: DMN Editor
>            Reporter: Guilherme Carreiro
>            Assignee: Guilherme Carreiro
>            Priority: Major
>              Labels: drools-tools
>         Attachments: DMCommunity Challenge - March 2017.dmn
>
>
> The creation of a new {{DataTypeListItem}} [here|https://github.com/kiegroup/kie-wb-common/blob/7f9a51f866fca11f7e7b10bc74a1d86591a7bf9c/kie-wb-common-dmn/kie-wb-common-dmn-client/src/main/java/org/kie/workbench/common/dmn/client/editors/types/listview/DataTypeList.java#L110] takes 100ms. This impacts the load time of the Data Types dialog when the user has many data types (e.g. more than 100).
> To solve this problem, we can pre-instantiate a poll of views and re-use them or take new views from this pool. I just validate this idea with a PoC, and I could reduce 70% of the load time.
> h2. Acceptance test
> # A lot of custom items, add top level item
> # A lot of custom items, remove top level item
> # Nested levels, add new deepest level item
> # Nested levels, remove deepest level item



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