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Anton Marsden edited a comment on an issue

Hi Steve, thanks for accepting the pull request. I have replied to your pull request questions and agree with much of your analysis. Feel free to improve my code :)

To summarise my thoughts:
- Lazy instantiation of query spaces performs better in scenarios where remove() or removeLastN() are called. I'm not sure how often this happens in the real world.
- I don't see double iteration as a major issue (it's still O(n) performance), but eager instantiation of query spaces would solve the problem.

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Hibernate ORM /

HHH-4577

Analyzing what our application is mainly doing during flush/commit,
we saw that very often the concerning thread is executing in jbosscache stuff (see 2 sample stacktraces below).
Analyzing the code we discovered that, if doing 1000 inserts for a determinate entity:
-on flush UpdateTimestampsCache.preinvalidate() is called 1000 times for the same space ...

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