[infinispan-issues] [JBoss JIRA] Commented: (ISPN-815) Clone caches should be created and started much faster

[Galder Zamarreño (JIRA)]

    [ https://jira.jboss.org/browse/ISPN-815?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12566577#comment-12566577 ] 

Galder Zamarreño commented on ISPN-815:
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Btw, we should probably avoid using JDK clone mechanism cos it's pretty hard to code and very easy to make mistakes. A copy contructor or factory would be a better, safer way to do so.

> Clone caches should be created and started much faster
> ------------------------------------------------------
>
>                 Key: ISPN-815
>                 URL: https://jira.jboss.org/browse/ISPN-815
>             Project: Infinispan
>          Issue Type: Bug
>          Components: Configuration
>    Affects Versions: 4.2.0.CR2
>            Reporter: Galder Zamarreño
>            Assignee: Galder Zamarreño
>             Fix For: 4.2.0.Final
>
>         Attachments: CacheStartProfile.png, StressCacheCreationTest.java
>
>
> We must be faster creating caches that are just simply copies of the same configuration.
> Creating 500 caches of the default cache configuration takes around 4 seconds.
> Creating 1000 caches takes around 10 seconds.
> This is too slow. As shown in the profiler screenshot, calling componentRegistry.registerComponent(spi, AdvancedCache.class); is quite expensive.
> The start procedure is also quite expensive, specially due to some reflection going on there.
> IMO, we need fast way to clone caches. IOW, if you create Cache A based on config default config, creating/starting Cache B based on default config should be extremely fast. Simply duplicate objects and set them in the right state.
> This is of particular importance in 2LC use cases where each entity/collection is stored in a separate cache and these are generally created on startup by the Hibernate Session Factory.
> Check the linked user forum post for some feedback from a 2LC user.

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